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Martin Doyle

Professor in the Environmental Sciences and Policy Division
Environmental Sciences and Policy
Environment Hall 3108, 9 Circuit Drive, Durham, NC 27708-0328
Environment Hall 3108, 9 Circuit Drive, Durham, NC 27708

Selected Publications


A new metric for sunlight exposure in rivers, lakes, and oceans

Journal Article Limnology And Oceanography Letters · April 1, 2024 Vertical motion is an important driver of sunlight exposure in aquatic environments, shaping the growth and fate of materials and organisms. We derive a simple model accounting for turbulent depth fluctuations of particles to predict the depth that contrib ... Full text Cite

Making a market in environmental credits I: Streams of value

Journal Article Environment and Planning E: Nature and Space · December 1, 2023 This pair of papers examines and describes the state action necessary to make markets function as environmental policy instruments and as strategies of governance. They do this through a detailed look at the mechanics of environmental credit compliance mar ... Full text Cite

Making a market in environmental credits II: Watershed moments

Journal Article Environment and Planning E: Nature and Space · December 1, 2023 This pair of papers examines and describes the state action necessary to make markets function as environmental policy instruments and as strategies of governance. We do this through a detailed look at the mechanics of environmental credit compliance marke ... Full text Cite

Accounting for Residential Nonpayment Risk for Water Utility Financial Sustainability

Journal Article Water Economics and Policy · June 1, 2023 Residential "Nonpayment risk"for water utilities-The risk of revenue loss from residential customers not paying water bills-is a financial risk for water service providers that remains poorly understood. Current rate setting strategies do not explicitly co ... Full text Cite

Financial Capability and Performance: Assessing Trends Among North Carolina Utilities

Journal Article Journal - American Water Works Association · January 1, 2023 Of 301 analyzed utilities in North Carolina, 51% reported operating revenues less than operating expenditures—operating ratios (ORs) less than 1. Affordability burden and OR were both affected by utilities’ respective population size, population growth or ... Full text Cite

Climate, race, and the cost of capital in the municipal bond market.

Journal Article PloS one · January 2023 Both climate risk and race are factors that may affect municipal bond yields, yet each has received relatively limited empirical research attention. We analyzed > 712,000 municipal bonds representing nearly 2 trillion USD in par outstanding, focusing on cr ... Full text Cite

Emerging roles for finance in river restoration and resilience

Chapter · January 1, 2023 River restoration has primarily relied on public sources for funding projects, such as agency-based grants and philanthropy. More recently, there is growing interest in the potential role of private finance to offset the declines in public funding and to p ... Full text Cite

A simple metric for predicting the timing of river phytoplankton blooms

Journal Article Ecosphere · December 1, 2022 In rivers, phytoplankton populations are continuously exported by unidirectional, advective flow. Both transport and growth conditions determine periods of excess phytoplankton growth, or blooms, in a given reach. Phytoplankton abundance, however, has main ... Full text Cite

Customer Assistance Programs and Water Affordability

Journal Article Journal - American Water Works Association · June 1, 2022 Water affordability is a growing concern, with inflation, aging infrastructure, source water protection, climate change, and other factors pushing up the cost of providing water. Customer assistance program (CAP) rate discounts provide needed assistance bu ... Full text Cite

Uncommitted State Revolving Funds

Report · March 21, 2022 States and the federal government invest in water, wastewater, and stormwater infrastructure by providing subsidized loans and other financial assistance through State Revolving Fund (SRF) programs. The funds are capitalized with federal grants, state cont ... Open Access Link to item Cite

Sensitivity Analysis of Using Municipal Boundaries as a Proxy for Service Area Boundaries When Calculating Water Affordability Metrics

Report · March 18, 2022 Water is essential for life, and yet one of the nation’s most pressing water challenges has become ensuring that water services are affordable for households and communities. While there has been growing attention and concern around affordable water servic ... Open Access Link to item Cite

Rising Market Risk Exposure of Municipal Water Service Providers in Distressed Cities

Journal Article Journal of Water Resources Planning and Management · February 1, 2022 Local governments in the US routinely provide water services drinking water delivery and wastewater treatment. After the Great Depression, the federal government shared the financial responsibility for water services. However, over the last 3 decades, fede ... Full text Cite

Influence of Aquatic and Semi-Aquatic Organisms on Channel Forms and Processes

Chapter · January 1, 2022 Recently, an interest has emerged in the role of aquatic biota as geomorphic agents. Although it is difficult to untangle the interconnectedness of the biotic and abiotic constituents within channel networks, a few theoretical efforts and several recent em ... Full text Cite

Measuring water affordability and the financial capability of utilities

Journal Article AWWA Water Science · November 1, 2021 The cost of providing water services is increasing, placing greater financial burdens on individual households and utilities. Five metrics were calculated at multiple volumes of water usage and were applied to 1791 utilities, estimating bills from 2020 rat ... Full text Cite

Water Consumption and Utility Revenues at the Start of a Pandemic: Insights From 11 Utilities

Journal Article Journal - American Water Works Association · November 1, 2021 Eleven utilities from across the United States were studied to understand the pandemic's effects on water consumption and utility revenues. Most utilities in the study saw an overall increase in water consumption with a rise in residential demand that offs ... Full text Cite

Growing Options for Shrinking Cities

Journal Article Journal - American Water Works Association · December 1, 2020 When people and industries leave a community, water utilities face the potential loss of revenue from departing customers and the cost and issues associated with maintaining excess system capacity. Water systems seek to (1) ensure affordability, (2) mainta ... Full text Cite

2020 Aspen-Nicholas Water Forum Water Affordability and Equity Briefing Document

Report · August 12, 2020 The importance of water and sanitation for public health is once again visible and may change the trajectory of the water sector moving forward. Given that water is essential for public health, what must be done to ensure that these life-sustaining service ... Open Access Link to item Cite

Riparian vegetation as an indicator of stream channel presence and connectivity in arid environments

Journal Article Journal of Arid Environments · July 1, 2020 Stream channels in the American Southwest are misunderstood because they have been understudied and overgeneralized. This misunderstanding has serious consequences for environmental policy, particularly in defining the scope of jurisdiction under the Clean ... Full text Cite

Compensatory Mitigation on Federal Lands

Report · February 6, 2020 As compensatory wetland and stream mitigation expands, particularly in the western United States, the availability and prominence of federal lands will become increasingly relevant in affecting the execution of mitigation. Moreover, as land management agen ... Open Access Link to item Cite

Light exposure along particle flowpaths in large rivers

Journal Article Limnology and Oceanography · January 1, 2020 Sunlight is a critical resource in aquatic systems driving photosynthesis, photodegradation of organic matter and contaminants, animal behavior, and the activity of human pathogens. In rivers, solutes, materials, and organisms are turbulently mixed across ... Full text Cite

A new metric for sunlight exposure in rivers, lakes, and oceans

Journal Article Limnology And Oceanography Letters · April 1, 2024 Vertical motion is an important driver of sunlight exposure in aquatic environments, shaping the growth and fate of materials and organisms. We derive a simple model accounting for turbulent depth fluctuations of particles to predict the depth that contrib ... Full text Cite

Making a market in environmental credits I: Streams of value

Journal Article Environment and Planning E: Nature and Space · December 1, 2023 This pair of papers examines and describes the state action necessary to make markets function as environmental policy instruments and as strategies of governance. They do this through a detailed look at the mechanics of environmental credit compliance mar ... Full text Cite

Making a market in environmental credits II: Watershed moments

Journal Article Environment and Planning E: Nature and Space · December 1, 2023 This pair of papers examines and describes the state action necessary to make markets function as environmental policy instruments and as strategies of governance. We do this through a detailed look at the mechanics of environmental credit compliance marke ... Full text Cite

Accounting for Residential Nonpayment Risk for Water Utility Financial Sustainability

Journal Article Water Economics and Policy · June 1, 2023 Residential "Nonpayment risk"for water utilities-The risk of revenue loss from residential customers not paying water bills-is a financial risk for water service providers that remains poorly understood. Current rate setting strategies do not explicitly co ... Full text Cite

Financial Capability and Performance: Assessing Trends Among North Carolina Utilities

Journal Article Journal - American Water Works Association · January 1, 2023 Of 301 analyzed utilities in North Carolina, 51% reported operating revenues less than operating expenditures—operating ratios (ORs) less than 1. Affordability burden and OR were both affected by utilities’ respective population size, population growth or ... Full text Cite

Climate, race, and the cost of capital in the municipal bond market.

Journal Article PloS one · January 2023 Both climate risk and race are factors that may affect municipal bond yields, yet each has received relatively limited empirical research attention. We analyzed > 712,000 municipal bonds representing nearly 2 trillion USD in par outstanding, focusing on cr ... Full text Cite

Emerging roles for finance in river restoration and resilience

Chapter · January 1, 2023 River restoration has primarily relied on public sources for funding projects, such as agency-based grants and philanthropy. More recently, there is growing interest in the potential role of private finance to offset the declines in public funding and to p ... Full text Cite

A simple metric for predicting the timing of river phytoplankton blooms

Journal Article Ecosphere · December 1, 2022 In rivers, phytoplankton populations are continuously exported by unidirectional, advective flow. Both transport and growth conditions determine periods of excess phytoplankton growth, or blooms, in a given reach. Phytoplankton abundance, however, has main ... Full text Cite

Customer Assistance Programs and Water Affordability

Journal Article Journal - American Water Works Association · June 1, 2022 Water affordability is a growing concern, with inflation, aging infrastructure, source water protection, climate change, and other factors pushing up the cost of providing water. Customer assistance program (CAP) rate discounts provide needed assistance bu ... Full text Cite

Uncommitted State Revolving Funds

Report · March 21, 2022 States and the federal government invest in water, wastewater, and stormwater infrastructure by providing subsidized loans and other financial assistance through State Revolving Fund (SRF) programs. The funds are capitalized with federal grants, state cont ... Open Access Link to item Cite

Sensitivity Analysis of Using Municipal Boundaries as a Proxy for Service Area Boundaries When Calculating Water Affordability Metrics

Report · March 18, 2022 Water is essential for life, and yet one of the nation’s most pressing water challenges has become ensuring that water services are affordable for households and communities. While there has been growing attention and concern around affordable water servic ... Open Access Link to item Cite

Rising Market Risk Exposure of Municipal Water Service Providers in Distressed Cities

Journal Article Journal of Water Resources Planning and Management · February 1, 2022 Local governments in the US routinely provide water services drinking water delivery and wastewater treatment. After the Great Depression, the federal government shared the financial responsibility for water services. However, over the last 3 decades, fede ... Full text Cite

Influence of Aquatic and Semi-Aquatic Organisms on Channel Forms and Processes

Chapter · January 1, 2022 Recently, an interest has emerged in the role of aquatic biota as geomorphic agents. Although it is difficult to untangle the interconnectedness of the biotic and abiotic constituents within channel networks, a few theoretical efforts and several recent em ... Full text Cite

Measuring water affordability and the financial capability of utilities

Journal Article AWWA Water Science · November 1, 2021 The cost of providing water services is increasing, placing greater financial burdens on individual households and utilities. Five metrics were calculated at multiple volumes of water usage and were applied to 1791 utilities, estimating bills from 2020 rat ... Full text Cite

Water Consumption and Utility Revenues at the Start of a Pandemic: Insights From 11 Utilities

Journal Article Journal - American Water Works Association · November 1, 2021 Eleven utilities from across the United States were studied to understand the pandemic's effects on water consumption and utility revenues. Most utilities in the study saw an overall increase in water consumption with a rise in residential demand that offs ... Full text Cite

Growing Options for Shrinking Cities

Journal Article Journal - American Water Works Association · December 1, 2020 When people and industries leave a community, water utilities face the potential loss of revenue from departing customers and the cost and issues associated with maintaining excess system capacity. Water systems seek to (1) ensure affordability, (2) mainta ... Full text Cite

2020 Aspen-Nicholas Water Forum Water Affordability and Equity Briefing Document

Report · August 12, 2020 The importance of water and sanitation for public health is once again visible and may change the trajectory of the water sector moving forward. Given that water is essential for public health, what must be done to ensure that these life-sustaining service ... Open Access Link to item Cite

Riparian vegetation as an indicator of stream channel presence and connectivity in arid environments

Journal Article Journal of Arid Environments · July 1, 2020 Stream channels in the American Southwest are misunderstood because they have been understudied and overgeneralized. This misunderstanding has serious consequences for environmental policy, particularly in defining the scope of jurisdiction under the Clean ... Full text Cite

Compensatory Mitigation on Federal Lands

Report · February 6, 2020 As compensatory wetland and stream mitigation expands, particularly in the western United States, the availability and prominence of federal lands will become increasingly relevant in affecting the execution of mitigation. Moreover, as land management agen ... Open Access Link to item Cite

Light exposure along particle flowpaths in large rivers

Journal Article Limnology and Oceanography · January 1, 2020 Sunlight is a critical resource in aquatic systems driving photosynthesis, photodegradation of organic matter and contaminants, animal behavior, and the activity of human pathogens. In rivers, solutes, materials, and organisms are turbulently mixed across ... Full text Cite

Federal Decentralization and Adaptive Management of Water Resources: Reservoir Reallocation by the U.S. Army Corps of Engineers

Journal Article Journal of the American Water Resources Association · October 1, 2019 Reservoir operations must respond to changing conditions, such as climate, water demand, regulations, and sedimentation. The U.S. Army Corps of Engineers (Corps) can reallocate reservoir storage to respond to such changes. We assembled and analyzed a datab ... Full text Cite

Managing rivers under changing environmental and societal boundary conditions, Part 2: Expected compared with experienced conditions at U.S. Army Corps of Engineers reservoirs

Journal Article River Research and Applications · May 1, 2019 Reservoirs are critical infrastructure typically built to function as designed for 50 to 100 years. The majority of U.S. Army Corps of Engineers reservoirs are more than 50 years old. The environmental, societal, and regulatory conditions surrounding the r ... Full text Cite

Managing rivers under changing environmental and societal boundary conditions, Part 1: National trends and U.S. Army Corps of Engineers reservoirs

Journal Article River Research and Applications · May 1, 2019 Most major rivers in the United States are managed by a system of reservoirs; many of which were built more than a half century ago. These reservoirs were designed based on environmental, societal, and regulatory assumptions at the time of construction. Si ... Full text Cite

Scoured or suffocated: Urban stream ecosystems oscillate between hydrologic and dissolved oxygen extremes

Journal Article Limnology and Oceanography · May 1, 2019 Headwater streams draining urbanized watersheds are subject to frequent and intense storm flows. These floods can disrupt metabolic processes occurring in benthic biofilms via the removal of biomass (i.e., scouring flows, bed mobilization) or light attenua ... Full text Cite

The Abundance, Size, and Spacing of Lakes and Reservoirs Connected to River Networks

Journal Article Geophysical Research Letters · March 16, 2019 Descriptions of river network topology do not include lakes/reservoirs that are connected to rivers. We describe the properties and scaling patterns of river network topology across the contiguous United States: how lake/reservoir abundance, median lake/re ... Full text Cite

Sediment–Water Surface Area Along Rivers: Water Column Versus Benthic

Journal Article Ecosystems · December 1, 2018 Aquatic ecosystems have two distinct zones: the water column and benthic zone. Although the benthic zone has received considerable attention, recent studies have found the water column capable of accounting for a majority of whole ecosystem processes in ri ... Full text Cite

Gene flow simulations demonstrate resistance of long-lived species to genetic erosion from habitat fragmentation

Journal Article Conservation Genetics · December 1, 2018 Habitat fragmentation restricts the movement of individuals across a landscape. In terrestrial and aquatic systems, barriers to movement can modify population and community dynamics at local or regional scales. This study contrasted life history traits rel ... Full text Cite

Addressing Declining Appropriations for Bureau of Reclamation Infrastructure: Policies Needed for Enabling Private Finance

Journal Article Journal of the American Water Resources Association · October 1, 2018 Western water infrastructure was funded in the early and mid-20th Century through federal financing through the Bureau of Reclamation. Over the past 30 years, federal financing has been less forthcoming, which has been commensurate with an increase in the ... Full text Cite

Impacts of Recreational Flow Releases on Macroinvertebrate Drift at Different Distances Downstream from Abanakee Dam, New York

Journal Article Northeastern Naturalist · May 1, 2018 We examined macroinvertebrate drift at 4 sites downstream of Abanakee Dam on the Indian River, NY, on separate days at base-flow conditions and following days during recreational releases (rapid releases supporting white-water rafting enterprises). Macroin ... Full text Cite

A Nationwide Analysis of U.S. Army Corps of Engineers Reservoir Performance in Meeting Operational Targets

Journal Article Journal of the American Water Resources Association · April 1, 2018 The United States (U.S.) Army Corps of Engineers operates reservoirs across the U.S. with 89% of reservoirs constructed prior to 1980. Many reservoirs have experienced changes in environmental conditions (e.g., climate and sediment yield) and societal cond ... Full text Cite

The Source: How Rivers Made America and America Remade Its Rivers

Book · February 6, 2018 Through his encounters with experts all over the country—a Mississippi River tugboat captain, an Erie Canal lock operator, a dendrochronologist who can predict the future based on the story trees tell about the past, a western rancher ... ... Cite

New strategies for measuring rates of environmental processes in rivers, lakes, and estuaries

Journal Article Freshwater Science · September 1, 2017 A central goal in limnology is measurement of physical, biogeochemical, and biological process rates. We can measure process rates from the temporal and spatial patterns they create in a measured variable, and we use 3 approaches for making those measureme ... Full text Cite

Environmental Impact Investing in Real Assets: What Environmental Measures Do Fund Managers Consider?

Report · June 30, 2017 As concerns over climate change and natural resource depletion grow, investors have begun seeking opportunities for generating both market-rate financial returns and quantifiable environmental gains. Investing with the objectives of social or environmental ... Open Access Link to item Cite

Estimating the Value of Public Water Data

Report · June 22, 2017 Public water data, such as river flow from stream gauges or precipitation from weather satellites, produce broad benefits at a cost to the general public. This paper presents a review of the academic literature on the costs and benefits of government inves ... Open Access Link to item Cite

Nature: A Conversation in Three Parts

Journal Article Annals of the American Association of Geographers · January 2, 2017 This conversation considers the contemporary popularity across the academy and among the wider public of the idea that humans and nature are always interconnected, as reflected especially in the idea of the Anthropocene. On the one hand, the popularity of ... Full text Cite

Shaping the Physical Template: Biological, Hydrological, and Geomorphic Connections in Stream Channels. Biological, Hydrological, and Geomorphic Connections in Stream Channels

Chapter · July 21, 2016 Stream channels are scaled to the amount of water and sediment they convey. The amount and size of bed sediment, composition of bank material, type of channel vegetation (both riparian and in-stream), and valley morphology (slope and width) influence chann ... Full text Cite

Designer Ecosystems: Incorporating Design Approaches into Applied Ecology

Chapter · November 4, 2015 To satisfy a growing population, much of Earth's surface has been designed to suit humanity's needs. Although these ecosystem designs have improved human welfare, they have also produced significant negative environmental impacts, which applied ecology as ... Full text Cite

Causes and consequences of habitat fragmentation in river networks.

Journal Article Annals of the New York Academy of Sciences · October 2015 Increases in river fragmentation globally threaten freshwater biodiversity. Rivers are fragmented by many agents, both natural and anthropogenic. We review the distribution and frequency of these major agents, along with their effects on connectivity and h ... Full text Cite

Effect of tributary and braided confluences on aquatic macroinvertebrate communities and geomorphology in an alpine river watershed

Journal Article Freshwater Science · September 1, 2015 River-channel confluences create habitat heterogeneity by introducing multiple zones of hydraulic flow and increase macroinvertebrate densities and diversity via the input of coarse sediment, allochthonous detritus, and nutrients. Current understanding of ... Full text Cite

The morphology of streams restored for market and nonmarket purposes: Insights from a mixed natural-social science approach

Journal Article Water Resources Research · July 1, 2015 Featured Publication We use geomorphic surveys to quantify the differences between restored and nonrestored streams, and the difference between streams restored for market purposes (compensatory mitigation) from those restored for nonmarket programs. We also analyze the social ... Full text Cite

Reservoir sedimentation and storage capacity in the United States: Management needs for the 21St Century

Journal Article Journal of Hydraulic Engineering · April 1, 2015 Forum papers are thought-provoking opinion pieces or essays founded in fact, sometimes containing speculation, on a civil engineering topic of general interest and relevance to the readership of the journal. The views expressed in this Forum article do not ... Full text Cite

Conditional water rights in the western United States: Introducing uncertainty to prior appropriation?

Journal Article Journal of the American Water Resources Association · February 1, 2015 In the prior-appropriation water rights regimes that prevail in the arid western United States, claims to annually variable surface water flows are fulfilled based on the order of their establishment. The two-step process used to establish an appropriative ... Full text Cite

Environmental management strategy: four forces analysis.

Journal Article Environmental management · January 2015 Featured Publication We develop an analytical approach for more systematically analyzing environmental management problems in order to develop strategic plans. This approach can be deployed by agencies, non-profit organizations, corporations, or other organizations and institu ... Full text Cite

Rangeland management and fluvial geomorphology in northern Tanzania.

Journal Article Geomorphology (Amsterdam, Netherlands) · June 2014 Researchers have independently documented the effects of land use on rivers and threats to river management institutions, but the relationship between changes in institutional context and river condition is not well described. This study assesses the conne ... Full text Cite

Influence of flood history and hydrology on transport of organic matter in a frequently flooded river

Journal Article Journal of Freshwater Ecology · January 2, 2014 Most studies of organic matter transport have been conducted on small headwater streams and have found that floods strongly influence downstream transport. We studied five sites on four rivers, each with different hydrographs and flood frequencies, in the ... Full text Cite

How wide is a stream? Spatial extent of the potential "stream signature" in terrestrial food webs using meta-analysis.

Journal Article Ecology · January 2014 The magnitude of cross-ecosystem resource subsidies is increasingly well recognized; however, less is known about the distance these subsidies travel into the recipient landscape. In streams and rivers, this distance can delimit the "biological stream widt ... Full text Cite

Bilateral oligopoly in pollution permit markets: Experimental evidence

Journal Article Economic Inquiry · January 1, 2014 We experimentally investigate behavior in a bilateral oligopoly using a supply function equilibria model discussed by Klemperer and Meyer (1989), Hendricks and McAfee (2010), and Malueg and Yates (2009). We focus on the role that market size and the degree ... Full text Cite

Stacking ecosystem services

Journal Article Frontiers in Ecology and the Environment · January 1, 2014 Featured Publication Ecosystem service markets are increasingly used as a policy solution to environmental problems ranging from endangered species to climate change. Such markets trade in ecosystem credits created at restoration sites where conservation projects are designed ... Full text Cite

Optimizing the scale of markets for water quality trading

Journal Article Water Resources Research · 2014 Featured Publication Applying market approaches to environmental regulations requires establishing a spatial scale for trading. Spatially large markets usually increase opportunities for abatement cost savings but increase the potential for pollution damages (hot spots), vice ... Full text Open Access Cite

Climate and direct human contributions to changes in mean annual streamflow in the South Atlantic, USA

Journal Article Water Resources Research · November 1, 2013 Streamflow responds to changing climate patterns as well as human modifications within a basin. Understanding the contribution of these different drivers to changes in streamflow provides important information regarding how to effectively and efficiently a ... Full text Cite

Geomorphology within the interdisciplinary science of environmental flows

Journal Article Geomorphology · October 15, 2013 The field tradition in geomorphology informs beyond studying landforms by also providing a stage for understanding how geomorphic elements influence the ecology of biota. The intersection between fluvial geomorphology and riverine ecology represents an ide ... Full text Cite

Market power, private information, and the optimal scale of pollution permit markets with application to North Carolina's Neuse River

Journal Article Resource and Energy Economics · September 1, 2013 We extend the analysis of optimal scale in pollution permit markets by allowing for both market power and private information. We characterize the total costs (abatement costs and damages) under market power and private information and compare them to tota ... Full text Cite

Reply to Discussion by Daniel A. Auerbach "America's Rivers and the American Experiment"

Journal Article Journal of the American Water Resources Association · August 1, 2013 Full text Cite

Hydrologic Versus Biogeochemical Controls of Denitrification in Tidal Freshwater Wetlands

Journal Article Estuaries and Coasts · May 1, 2013 Tidal freshwater wetlands (TFW) alter nitrogen concentrations in river water, but the role of these processes on a river's downstream nitrogen delivery is poorly understood. We examined spatial and temporal patterns in denitrification in TFW of four rivers ... Full text Cite

The effect of tide on the hydrology and morphology of a freshwater river

Journal Article Earth Surface Processes and Landforms · May 1, 2013 How does river hydrology and morphology change due to tidal influence? We contend that this is a question of particular consequence to many earth surface disciplines, but one that has not been adequately addressed. Previous studies have relied on gradients ... Full text Cite

River Federalism

Journal Article Annals of the Association of American Geographers · March 2013 Featured Publication Full text Cite

Retention and transport of nutrients in a mature agricultural impoundment

Journal Article Journal of Geophysical Research: Biogeosciences · March 1, 2013 Small impoundments intended for irrigation, livestock watering, and hydropower are numerous in agricultural regions of the world. Many of these artificial water bodies are well positioned to intercept fertilizer runoff and pollutants but could be vulnerabl ... Full text Cite

Generation, transport, and disposal of wastewater associated with Marcellus Shale gas development

Journal Article Water Resources Research · February 1, 2013 Hydraulic fracturing has made vast quantities of natural gas from shale available, reshaping the energy landscape of the United States. Extracting shale gas, however, generates large, unavoidable volumes of wastewater, which to date lacks accurate quantifi ... Full text Cite

The hydrologic and economic feasibility of micro hydropower upfitting and integration of existing low-head dams in the United States

Journal Article Energy Policy · January 1, 2013 The integration of hydropower facilities on existing low-head, non-Federal dams and their subsequent tie to regional electricity grids may serve as a useful de-centralized component of renewable energy integration in the United States. Thousands of low-hea ... Full text Cite

Characterization of Drought in the South Atlantic, United States

Journal Article Journal of the American Water Resources Association · January 1, 2013 Drought has been less extensively characterized in the humid South Atlantic compared to the arid western United States. Our objective was to characterize drought in the South Atlantic and to understand whether drought has become more severe in this region ... Full text Cite

Influence of Aquatic and Semi-Aquatic Organisms on Channel Forms and Processes

Journal Article · January 1, 2013 Recently, an interest has emerged in the role of aquatic biota as geomorphic agents. Although it is difficult to untangle the interconnectedness of the biotic and abiotic constituents within channel networks, a few theoretical efforts and several recent em ... Full text Cite

Influence of Aquatic and Semi-Aquatic Organisms on Channel Forms and Processes

Chapter · January 1, 2013 Recently, an interest has emerged in the role of aquatic biota as geomorphic agents. Although it is difficult to untangle the interconnectedness of the biotic and abiotic constituents within channel networks, a few theoretical efforts and several recent em ... Full text Cite

Characterization of drought in the south atlantic, united states

Journal Article Journal of the American Water Resources Association · 2013 Cite

Streamflow Changes in the South Atlantic, United States During the Mid- and Late 20th Century

Journal Article Journal of the American Water Resources Association · December 1, 2012 Repeated severe droughts over the last decade in the South Atlantic have raised concern that streamflow may be systematically decreasing, possibly due to climate variability. We examined the monthly and annual trends of streamflow, precipitation, and tempe ... Full text Cite

Physical and plant community controls on nitrogen and phosphorus leaching from impounded riverine wetlands following dam removal

Journal Article River Research and Applications · November 1, 2012 Dam removal has emerged as a critical issue in water resources engineering and management. Of particular concern in many regions of the USA is the effect of dam removal on downstream water quality and potential methods of decreasing sediment and nutrient l ... Full text Cite

Tidal geomorphology affects phytoplankton at the transition from forested streams to tidal rivers

Journal Article Freshwater Biology · October 1, 2012 1. Coastal rivers can have long tidally influenced reaches that are affected by tides but do not contain saline water. These tidal freshwater reaches have steep geomorphic gradients where the river transitions from narrow, heavily shaded streams to wide, u ... Full text Cite

America's Rivers and the American Experiment

Journal Article Journal of the American Water Resources Association · August 1, 2012 Featured Publication America's rivers are managed, over long periods of time, based on the most basic ideologies of the United States (U.S.) government. An essential notion of the U.S. government, and thus a necessity of river management, is governing as experiment. This leads ... Full text Cite

The geography of trading ecosystem services: A case study of wetland and stream compensatory mitigation markets

Journal Article Harvard Environmental Law Review · July 25, 2012 Featured Publication With the exception of greenhouse gas trading programs, environmental markets are prisoners of their own geography - and with good reason. Climate change is a global phenomenon, and so carbon markets can be geographically all-inclusive - a ton of carbon dio ... Cite

Compensatory mitigation for streams under the Clean Water Act

Journal Article J Amer Water Resources Assoc · July 2012 Featured Publication Cite

Compensatory Mitigation for Streams Under the Clean Water Act: Reassessing Science and Redirecting Policy

Journal Article Journal of the American Water Resources Association · June 1, 2012 Featured Publication Current stream restoration science is not adequate to assume high rates of success in recovering ecosystem functional integrity. The physical scale of most stream restoration projects is insufficient because watershed land use controls ambient water qualit ... Full text Cite

Evolving law and policy of freshwater ecosystem service markets

Journal Article William and Mary Environmental Law and Policy Review · 2012 Cite

Historical perspectives on river restoration design in the USA

Journal Article Progress in Physical Geography · January 1, 2012 River restoration as a science needs to balance numerical analysis with a more general systems understanding typical of a classification-based approach. We show the need for this balance by comparing the Davis-Gilbert debate in physical geography to the cu ... Full text Cite

Risk and markets for ecosystem services.

Journal Article Environmental science & technology · December 2011 Market-based environmental regulations (e.g., cap and trade, "payments for ecosystem services") are increasingly common. However, few detailed studies of operating ecosystem markets have lent understanding to how such policies affect incentive structures f ... Full text Cite

Micro hydropower in the north Carolina piedmont: A feasibility study on integrating existing Low-head dams into the regional grid

Journal Article Association of State Dam Safety Officials Annual Conference 2011, Dam Safety 2011 · December 1, 2011 The integration of hydropower facilities on existing low-head, non-Federal dams and their subsequent tie to regional electricity grids may serve as a useful de-centralized component of renewable domestic energy integration. We focus specifically on functio ... Cite

Micro hydropower in the North Carolina Piedmont: A feasibility study on integrating existing low-head dams into the regional grid

Journal Article Association of State Dam Safety Officials - Dam Safety 2011 · December 1, 2011 The integration of hydropower facilities on existing low-head, non-Federal dams and their subsequent tie to regional electricity grids may serve as a useful de-centralized component of renewable domestic energy integration. We focus specifically on functio ... Cite

Water quality changes in the world's first special economic zone, Shenzhen, China

Journal Article Water Resources Research · November 18, 2011 Shenzhen, as the first special economic zone in the world, has been in the process of rapid urbanization for 30 years. Many special economic zones have been established in China and other nations following Shenzhen's experience. However, Shenzhen has attai ... Full text Cite

Hypsographic demography across scale

Journal Article Professional Geographer · November 1, 2011 The typical framework for assessing human population distribution is across a flat, two-dimensional landscape. We alter this perspective by examining population distribution with respect to a third dimension, elevation. This alternative framework, termed h ... Full text Cite

Macroinvertebrate community responses to a dewatering disturbance gradient in a restored stream

Journal Article Hydrology and Earth System Sciences · June 20, 2011 Dewatering disturbances are common in aquatic systems and represent a relatively untapped field of disturbance ecology, yet studying dewatering events along gradients in non-dichotomous (i.e. wet/dry) terms is often difficult. Because many stream restorati ... Full text Cite

Impact of regulated releases on periphyton and macroinvertebrate communities: The dynamic relationship between hydrology and geomorphology in frequently flooded rivers

Journal Article River Research and Applications · June 1, 2011 Flood-type disturbances affect both periphyton and macroinvertebrate communities depending on their frequency, magnitude and duration, but some impacts can be mitigated by geomorphic constraints. We studied four rivers in the Adirondack Mountains; the Indi ... Full text Cite

Human impacts to river temperature and their effects on biological processes: A quantitative synthesis

Journal Article Journal of the American Water Resources Association · June 1, 2011 Land-use change and water resources management increasingly impact stream and river temperatures and therefore aquatic organisms. Efforts at thermal mitigation are expected to grow in future decades. Yet the biological consequences of both human thermal im ... Full text Cite

Light as a first-order control on ecosystem structure in a temperate stream

Journal Article Ecohydrology · May 1, 2011 An emerging issue in ecohydrology is the role of light in fluvial ecosystem dynamics. Here, we investigate how photosynthetically active radiation (PAR) influences the hydrogeomorphology and biogeochemistry of a second-order temperate stream with varying r ... Full text Cite

Effect of channel restoration on flood wave attenuation

Journal Article Journal of Hydraulic Engineering · January 14, 2011 Stream channel restoration can increase flow storage and energy dissipation of passing flood waves. Elements of restoration design that can enhance attenuation include remeandering, which reduces channel slope and increases channel length relative to the f ... Full text Cite

Quantitatively evaluating restoration scenarios for rivers with recreational flow releases

Journal Article Geophysical Monograph Series · January 1, 2011 Rivers worldwide have been drastically altered in terms of hydrology and morphology. To date, restoration has focused heavily on channel design (i.e., channel morphology), despite the well-known importance of flow regime on controlling ecological processes ... Full text Cite

Ecological response to riverine temperature change

Journal Article J Amer Water Resources Assoc · 2011 Cite

What is a stream?

Journal Article Environmental science & technology · January 2011 Featured Publication Full text Cite

Phosphorus export from a restored wetland ecosystem in response to natural and experimental hydrologic fluctuations

Journal Article Journal of Geophysical Research: Biogeosciences · December 1, 2010 Wetland restoration is a commonly used approach to reduce nutrient loading to freshwater and coastal ecosystems, with many wetland restoration efforts occurring in former agricultural fields. Restored wetlands are expected to be effective at retaining or r ... Full text Open Access Cite

Effect of channel restoration on flood wave attenuation

Journal Article Watershed Management Conference 2010: Innovations in Watershed Management under Land Use and Climate Change - Proceedings of the 2010 Watershed Management Conference · December 1, 2010 Re-establishment of floodplain hydraulic function is increasingly a goal of restoration programs, yet the approximate magnitude of possible change to attenuation due to reach-scale restoration remains poorly quantified. The efficacy of channel restoration ... Full text Cite

The Water Quality Consequences of Restoring Wetland Hydrology to a Large Agricultural Watershed in the Southeastern Coastal Plain

Journal Article Ecosystems. · November 2010 To ameliorate local and coastal eutrophication, management agencies are increasingly turning to wetland restoration. A large portion of restoration is occurring in areas that were drained for agriculture. To recover wetland function these areas must be ref ... Full text Cite

Privatizing stream restoration in the US

Journal Article Social Studies of Science · October 6, 2010 In this paper, we use a case study of the stream restoration field to demonstrate how the particular state and market logics of neoliberalism are shifting both the practice of restoration scientists and the relations between public and private sector scien ... Full text Cite

Response of stream macroinvertebrates in flow refugia and high-scour areas to a series of floods: a reciprocal replacement study

Journal Article Journal of the North American Benthological Society · June 1, 2010 Disturbances from flooding are a dominant feature of the habitat template in streams. Frequent floods created by recreational releases (1–2 d between releases/floods) from Abanakee Dam in the Adirondack Mountains, USA, result in a static mosaic of scoured ... Full text Cite

Planning for ecosystem service markets

Journal Article Journal of the American Planning Association · February 22, 2010 Problem: Market mechanisms are emerging as means of offsetting the environmental effects of growth. Unfortunately, formal regulation of ecosystem markets is often separated from broader planning for urban development, resulting in offsets that are unsustai ... Full text Cite

Stream ecosystem service markets under no-net-loss regulation

Journal Article Ecological Economics · February 15, 2010 We analyze interactions between economics and ecology for ecosystem service markets under no-net-loss regulation. Previous studies of no-net-loss regulation address the ecological efficacy and valuation of restoration but largely ignore the effects of mark ... Full text Cite

Life in the truck lane: Urban development in Western Rough Cilicia

Journal Article Jahreshefte des Osterreichischen Archaologischen Institutes in Wien · December 1, 2009 Full text Cite

Landscape characteristics of a stream and wetland mitigation banking program.

Journal Article Ecological applications : a publication of the Ecological Society of America · December 2009 In the United States, stream restoration is an increasing part of environmental and land management programs, particularly under the auspices of compensatory mitigation regulations. Markets and regulations surrounding stream mitigation are beginning to mir ... Full text Cite

Infrastructure and the environment

Journal Article Annual Review of Environment and Resources · December 1, 2009 Infrastructure is the foundation on which industrialized economies are built. As global population has grown and as economies of many regions have expanded, the quantity and scale of Infrastructure has increased dramatically. Although some Infrastructure i ... Full text Cite

Environmental markets: the power of regulation.

Journal Article Science (New York, N.Y.) · November 2009 Full text Cite

Comparison of morphological and biological control of exchange with transient storage zones in a field-scale flume

Journal Article Journal of Geophysical Research: Biogeosciences · June 28, 2009 To determine how differences in geomorphologie setting influence spatial heterogeneity in transport and uptake of limiting nutrients, we investigated reach-scale interactions between porous bed material textures, bed morphology, transient storage, and nutr ... Full text Cite

Assessing effectiveness of national flood policy through spatiotemporal monitoring of socioeconomic exposure

Journal Article Journal of the American Water Resources Association · February 1, 2009 After a century of evolving flood policies, there has been a steady increase in flood losses, which has partly been driven by development in flood prone areas. National flood policy was revised in 1994 to focus on limiting and reducing the amount of develo ... Full text Cite

Restoration geographies

Journal Article Ecological Restoration · January 1, 2009 Full text Cite

Alternative reference frames in river system science

Journal Article BioScience · January 1, 2009 Featured Publication Understanding environmental processes begins with mental conceptualizations of system components and interactions. Conceptualizing rivers begins with adopting one of two reference frames for observing movement: Eulerian, wherein the flux of objects is obse ... Full text Cite

The influence of in-stream structures on summer water temperatures via induced hyporheic exchange

Journal Article Limnology and Oceanography · January 1, 2009 Temperature is an important controlling factor for ecological functions. In-stream geomorphic structures affect stream thermal regimes by facilitating hyporheic exchange of water and heat between stream channels and underlying sediments. We varied the heig ... Full text Cite

Stream restoration strategies for reducing river nitrogen loads

Journal Article Frontiers in Ecology and the Environment · December 1, 2008 Despite decades of work on implementing best management practices to reduce the movement of excess nitrogen (N) to aquatic ecosystems, the amount of N in streams and rivers remains high in many watersheds. Stream restoration has become increasingly popular ... Full text Cite

Riparian zone denitrification affects nitrogen flux through a tidal freshwater river

Journal Article Biogeochemistry · December 1, 2008 Tidal freshwater zones (TFZ) of coastal rivers link terrestrial watersheds to the ocean and are characterized by large, regularly inundated riparian zones. We investigated the effect of riparian denitrification on nitrogen flux in the TFZ Newport River, No ... Full text Cite

A mechanistic model of woody debris jam evolution and its application to wood-based restoration and management

Journal Article River Research and Applications · December 1, 2008 The natural tendency of woody debris to accumulate into complex debris jams has been adapted by the restoration industry because of the morphological and ecological benefits of these structures. While much work has been done on woody debris, there is a lac ... Full text Cite

Basin-scale consequences of agricultural land use on benthic light availability and primary production along a sixth-order temperate river

Journal Article Ecosystems · November 1, 2008 The emerging spatial scale of interest for fluvial ecosystem studies and applications is the river basin. Although much focus has been directed toward habitat availability and nutrient cycling across the fluvial landscape, light availability has received c ... Full text Cite

Optical water quality in rivers

Journal Article Water Resources Research · October 1, 2008 Optical water quality (OWQ) governs the quantity and quality of light in aquatic ecosystems, and thus spatiotemporal changes in OWQ affect many biotic and abiotic processes. Despite the fundamental role of light in rivers, studies on riverine OWQ have been ... Full text Cite

Suspended sediments in river ecosystems: Photochemical sources of dissolved organic carbon, dissolved organic nitrogen, and adsorptive removal of dissolved iron

Journal Article Journal of Geophysical Research: Biogeosciences · September 28, 2008 We generated suspended sédiment solutions using river sediments and river water at concentrations similar to those observed during 1.5 year floods (Q1.5) and a dam removal (∼325 mg L-1) on the Deep River, North Carolina. Suspended sediment solutions were e ... Full text Cite

Empirical modeling of light availability in rivers

Journal Article Journal of Geophysical Research: Biogeosciences · September 28, 2008 While the influence of hydrology and geomorphology on ecosystem-limiting factors in rivers has been well studied, particularly habitat availability and nutrient cycling, the more fundamental limitation of light availability has received much less attention ... Full text Cite

Hydrologic versus geomorphic limitation on CPOM storage in stream ecosystems

Journal Article Freshwater Biology · August 1, 2008 1. Stream ecosystems are the products of interactions between hydrology, geomorphology and ecology, but examining all three components simultaneously is difficult and rarely attempted. Frequently, either geomorphology or hydrology is treated as invariable ... Full text Cite

Reply to discussion

Journal Article Journal of the American Water Resources Association · June 1, 2008 Full text Cite

In-stream geomorphic structures as drivers of hyporheic exchange

Journal Article Water Resources Research · March 1, 2008 [1] Common in-stream geomorphic structures such as debris dams and steps can drive hyporheic exchange in streams. Exchange is important for ecological stream function, and restoring function is a goal of many stream restoration projects, yet the connection ... Full text Cite

An alternative measure of discharge effectiveness

Journal Article Earth Surface Processes and Landforms · February 1, 2008 Since 1960, geomorphic effectiveness has been quantified by analytically combining measures of the frequency and the magnitude of geomorphic processes, most often for the case of sediment yield in rivers via the calculation of effective discharge, Qeff. He ... Full text Cite

Why you should pay attention to stream mitigation banking

Journal Article Ecological Restoration · January 1, 2008 Full text Cite

Environmental science. Aging infrastructure and ecosystem restoration.

Journal Article Science (New York, N.Y.) · January 2008 Full text Cite

Critical evaluation of how the Rosgen classification and associated "natural channel design" methods fail to integrate and quantify fluvial processes and channel response

Journal Article Journal of the American Water Resources Association · October 1, 2007 Over the past 10 years the Rosgen classification system and its associated methods of "natural channel design" have become synonymous to some with the term "stream restoration" and the science of fluvial geomorphology. Since the mid 1990s, this classificat ... Full text Cite

Suspended sediment, dissolved organic carbon, and dissolved nitrogen export during the dam removal process

Journal Article Water Resources Research · September 1, 2007 Total suspended solids (TSS), dissolved organic carbon (DOC), and total dissolved nitrogen (TDN) loads were calculated for all stages of the dam removal process (dewatering, breaching, and removal) at various points upstream, within, and downstream of Lowe ... Full text Cite

The problem of boundaries in defining ecosystems: A potential landmine for uniting geomorphology and ecology

Journal Article Geomorphology · September 1, 2007 Forging stronger linkages between geomorphology and ecosystem ecology depends, in part, upon developing common conceptualizations of an ecosystem. Because most ecosystem processes are scale dependent, the choice of boundaries is of profound importance to t ... Full text Cite

Geomorphology and ecosystems: Challenges and keys for success in bridging disciplines

Journal Article Geomorphology · September 1, 2007 Geomorphology plays a fundamental role in controlling many ecosystem processes, and in turn, ecosystems can have a profound influence on many geomorphic forms and processes. Over the past few decades, a proliferation of research has developed at the interf ... Full text Cite

Structure and hydraulics of natural woody debris jams

Journal Article Water Resources Research · June 1, 2007 [1] Numerous studies exist on the hydraulics of woody debris jams and the mechanisms driving their geomorphic influence. While most hydraulic studies treat jams as single, solid objects, jams are clearly not individual cylindrical logs but rather an accumu ... Full text Cite

Channel-Forming Discharge Selection in River Restoration Design

Journal Article Journal of Hydraulic Engineering · January 1, 2007 The concept of channel-forming (Qcf) or dominant discharge is now a cornerstone of river channel restoration design. Three measures of channel-forming discharge are most commonly applied: effective discharge (Qeff), bankfull discharge (Qbf), and a discharg ... Full text Cite

Atmospheric photochemical transformations enhance 1,3-butadiene-induced inflammatory responses in human epithelial cells: The role of ozone and other photochemical degradation products

Journal Article Chemico-Biological Interactions · 2007 Chemistry of hazardous air pollutants has been studied for many years, yet little is known about how these chemicals, once reacted within urban atmospheres, affect healthy and susceptible individuals. Once released into the atmosphere, 1,3-butadiene (BD) r ... Full text Cite

Development and testing of a chemical mechanism for atmospheric photochemical transformations of 1,3-butadiene

Journal Article Chemico-Biological Interactions · 2007 1,3-Butadiene (BD) in the atmosphere is a highly reactive hazardous air pollutant, which has a short lifetime and is quickly transformed to reaction products, some of which are also toxic. The ability to predict exposure to BD and its' products requires mo ... Full text Cite

Nutrient spiraling in streams and river networks

Journal Article Journal of Geophysical Research: Biogeosciences · December 28, 2006 Over the past 3 decades, nutrient spiraling has become a unifying paradigm for stream biogeochemical research. This paper presents (1) a quantitative synthesis of the nutrient spiraling literature and (2) application of these data to elucidate trends in nu ... Full text Cite

Exploring potential spatial-temporal links between fluvial geomorphology and nutrient-periphyton dynamics in streams using simulation models

Journal Article Annals of the Association of American Geographers · December 1, 2006 Understanding stream ecosystem processes necessitates an awareness of not only the physical, chemical, and biological systems, but also how these separate systems interact with each other. Using a nutrient retention and periphyton growth model coupled to a ... Full text Cite

A heuristic model for potential geomorphic influences on trophic interactions in streams

Journal Article Geomorphology · July 30, 2006 Whereas certain linkages between stream channel morphology and stream ecology are fairly well-understood, how geomorphology influences trophic interactions remains largely unknown. As a first step, a simple, heuristic model is developed that couples reach- ... Full text Cite

Adapting existing models to examine effects of agricultural conservation programs on stream habitat quality

Journal Article Journal of the American Water Resources Association · February 1, 2006 Annual expenditures by the federal government in the United States for agricultural conservation programs increased about 80 percent with passage of the 2002 Farm Bill. However, environmental benefits of these programs have not been quantified. A national ... Full text Cite

Creating effective flood mitigation policies

Journal Article Eos · January 1, 2006 Full text Cite

The most-cited works in Geomorphology

Journal Article Geomorphology · December 1, 2005 We conducted a review and analysis of the references cited in articles published (1995-2004) in the journal Geomorphology and also solicited comments from the authors of the most-cited works on their major influences. Of the 31,696 unique works cited in th ... Full text Cite

How well do the rosgen classification and associated "natural channel design" methods integrate and quantify fluvial processes and channel response?

Journal Article World Water Congress 2005: Impacts of Global Climate Change - Proceedings of the 2005 World Water and Environmental Resources Congress · December 1, 2005 Over the past 10 years the Rosgen classification system and its associated methods of "natural channel design" have become synonymous (to many without prior knowledge of the field) with the term "stream restoration" and the science of fluvial geomorphology ... Full text Cite

Stream ecosystem response to experimental dam removals

Journal Article Proceedings of the 2005 Watershed Management Conference - Managing Watersheds for Human and Natural Impacts: Engineering, Ecological, and Economic Challenges · November 17, 2005 In this paper we synthesize a series of small dam removal studies to examine how changes in channel form can affect riparian vegetation, fish, macroinvertebrates, mussels, and nutrient dynamics. Our results suggest that ecosystems may follow two trajectori ... Cite

Channel adjustment and floodplain development following dam removal

Journal Article Proceedings of the 2005 Watershed Management Conference - Managing Watersheds for Human and Natural Impacts: Engineering, Ecological, and Economic Challenges · November 17, 2005 Dam removal is being used to experimentally investigate hydrologic, geomorphic and ecological links in streams, particularly riparian vegetation and floodplain wetlands as mediated by channel adjustment. Damming leads to accumulation of organic matter and ... Cite

Effective discharge analysis of ecological processes in streams

Journal Article Water Resources Research · November 1, 2005 [1] Discharge is a master variable that controls many processes in stream ecosystems. However, there is uncertainty of which discharges are most important for driving particular ecological processes and thus how flow regime may influence entire stream ecos ... Full text Cite

Stream ecosystem response to small dam removal: Lessons from the Heartland

Journal Article Geomorphology · October 1, 2005 In this paper, we synthesize a series of small dam removal studies to examine how changes in channel form can affect riparian vegetation, fish, macroinvertebrates, mussels, and nutrient dynamics. Each of the ecosystem attributes responded to the disturbanc ... Full text Cite

In-channel transient storage and associated nutrient retention: Evidence from experimental manipulations

Journal Article Limnology and Oceanography · January 1, 2005 We examined the effect of in-channel flow obstructions such as vegetation and coarse woody debris (CWD) on transient storage and nutrient uptake by using experimental channel manipulations. Transient storage and nutrient uptake were measured under existing ... Full text Cite

Sedimentation engineering design in river restoration: Task committee monograph DRAFT

Journal Article Joint Conference on Water Resource Engineering and Water Resources Planning and Management 2000: Building Partnerships · December 1, 2004 An ASCE Task Committee formed under the Sedimentation Committee has evolved into a technical committee of the new Environmental & Water Resource Institute. The committee has sponsored many sessions on sedimentation engineering in river restoration at ASCE ... Full text Cite

Dam removal: Physical, biological, and societal considerations

Journal Article Joint Conference on Water Resource Engineering and Water Resources Planning and Management 2000: Building Partnerships · December 1, 2004 The American environmental movement is currently witnessing significant changes in accepted approaches to river management. Rivers once developed and altered for human benefits are being restored in a variety of manners and magnitudes, often with the sole ... Full text Cite

Response of unionid mussels to dam removal in Koshkonong Creek, Wisconsin (USA)

Journal Article Hydrobiologia · September 1, 2004 Dam removal is a potentially powerful tool for restoring riverine habitats and communities. However, the effectiveness of this tool is unknown because published data on the effects of dam removal on in-stream biota are lacking. We investigated the effects ... Full text Cite

Effects of 1,3-butadiene, isoprene, and their photochemical degradation products on human lung cells

Journal Article Environmental Health Perspectives · 2004 Because of potential exposure both in the workplace and from ambient air, the known carcinogen 1,3-butadiene (BD) is considered a priority hazardous air pollutant. BD and its 2-methyl analog, isoprene (ISO), are chemically similar but have very different t ... Full text Cite

Photochemical products in urban mixtures enhance inflammatory responses in lung cells

Journal Article Inhalation Toxicology · 2004 Complex urban air mixtures that realistically mimic urban smog can be generated for investigating adverse health effects. "Smog chambers" have been used for over 30 yr to conduct experiments for developing and testing photochemical models that predict ambi ... Full text Cite

Modelling the effect of form and profile adjustments on channel equilibrium timescales

Journal Article Earth Surface Processes and Landforms · November 1, 2003 A model for describing river channel profile adjustments through time is developed and applied to a river responding to base-level lowering in order to examine the effect of channel widening and downstream aggradation on equilibrium timescales. Across a ra ... Full text Cite

A scaling approximation of equilibrium timescales for sand-bed and gravel-bed rivers responding to base-level lowering

Journal Article Geomorphology · September 5, 2003 The timescale required for a river channel to reach new equilibrium conditions following a disturbance presumably depends on channel substrate size, and previous field studies have suggested that gravel-bed channels should reach equilibrium more quickly th ... Full text Cite

Toward policies and decision-making for dam removal.

Journal Article Environmental management · April 2003 Dam removal has emerged as a critical issue in environmental management. Agencies responsible for dams face a drastic increase in the number of potential dam removals in the near future. Given limited resources, these agencies need to develop ways to decid ... Full text Cite

When models meet managers: Examples from geomorphology

Chapter · January 1, 2003 Geomorphic models are increasingly used to support public policy and natural resources management. We present five examples of the interaction between models and managers and consider factors that influence their success or failure. Essential elements incl ... Full text Cite

Design for Stream Restoration

Journal Article Journal of Hydraulic Engineering · January 1, 2003 Stream restoration, or more properly rehabilitation, is the return of a degraded stream ecosystem to a close approximation of its remaining natural potential. Many types of practices (dam removal, levee breaching, modified flow control, vegetative methods ... Full text Cite

Hydrogeomorphic controls on phosphorus retention in streams

Journal Article Water Resources Research · January 1, 2003 We compared the relative influences of biochemical uptake processes and dynamic hydrology and geomorphology (hydrogeomorphology) on molybdate reactive phosphorus (MRP) retention within a stream. MRP concentrations were measured upstream and downstream of a ... Full text Cite

Predicting the depth of erosion in reservoirs following dam removal using bank stability analysis

Journal Article International Journal of Sediment Research · 2003 Cite

Channel adjustments following two dam removals in Wisconsin

Journal Article Water Resources Research · January 1, 2003 We examined channel response following the removal of low-head dams on two low-gradient, fine- to coarse-grained rivers in southern Wisconsin. Following removal, channels eroded large quantities of fine sediment, resulting in deposition 3-5 km downstream. ... Full text Cite

Geomorphic analogies for assessing probable channel response to dam removal

Journal Article Journal of the American Water Resources Association · January 1, 2002 There is a pressing need for tools to predict the rates, magnitudes, and mechanisms by which sediment is removed from a reservoir following dam removal, as well as for tools to predict where this sediment will be deposited downstream and how it will impact ... Full text Cite

Short-term changes in channel form and macroinvertebrate communities following low-head dam removal

Journal Article Journal of the North American Benthological Society · January 1, 2002 Although >70 dams have been decommissioned in Wisconsin over the past 30 y, little is known about the physical and ecological effects of dam removal on riverine ecosystems. The purpose of our study was to document changes in channel form and macroinvertebr ... Full text Cite

A Categorization of Approaches to Natural Channel Design

Journal Article Proceedings of the 2001 Wetlands Engineering and River Restoration Conference · December 1, 2001 Presented herein is a categorization of commonly applied approaches to natural channel design. Approaches have been categorized as analog, empirical, or analytical. Methods and limitations of each approach and considerations for selection of an appropriate ... Cite

Rapid assessment of channel stability in vicinity of road crossing

Journal Article Journal of Hydraulic Engineering · January 1, 2001 Full text Cite

Incorporation of bed texture into a channel evolution model

Journal Article Geomorphology · October 5, 2000 Channel evolution models (CEM) have been developed to qualitatively describe the morphological adjustments of channels undergoing incision, but the grain size of the river bed material has not been addressed in existing evolution models. Herein, bed materi ... Full text Cite

Examining the effects of urbanization on streams using indicators of geomorphic stability

Journal Article Physical Geography · January 1, 2000 Understanding the response of a watershed to urbanization is important for future land use management and preserving or restoring aquatic habitat. Previous geomorphic studies of urbanization primarily consist of case studies documenting changes in hydrolog ... Full text Cite

Heterogeneous catalysis: Looking forward with molecular simulation

Journal Article Catalysis Today · May 12, 1999 Some of the areas in which we anticipate, over the next five years, notable advances in the application of molecular simulation to problems in heterogeneous catalysis are considered, in the context of recent progress to date. The areas specifically address ... Full text Cite

Perturbations of stage hydrographs caused by channelization and incision

Journal Article International Water Resources Engineering Conference - Proceedings · January 1, 1998 Fifty-five years of daily stage records were examined for two gages located on adjacent streams in northwestern Mississippi. The two streams have similar watersheds, but differ in management history: the upstream drainage network for one has been channeliz ... Cite