River restoration: the fuzzy logic of repairing reaches to reverse catchment scale degradation.

Published

Journal Article

River restoration is an increasingly common approach utilized to reverse past degradation of freshwater ecosystems and to mitigate the anticipated damage to freshwaters from future development and resource-extraction activities. While the practice of river restoration has grown exponentially over the last several decades, there has been little empirical evaluation of whether restoration projects individually or cumulatively achieve the legally mandated goals of improving the structure and function of streams and rivers. New efforts to evaluate river restoration projects that use channel reconfiguration as a methodology for improving stream ecosystem structure and function are finding little evidence for measurable ecological improvement. While designed channels may have less-incised banks and greater sinuousity than the degraded streams they replace, these reach-scale efforts do not appear to be effectively mitigating the physical, hydrological, or chemical alterations that are responsible for the loss of sensitive taxa and the declines in water quality that typically motivate restoration efforts. Here we briefly summarize this new literature, including the collection of papers within this Invited Feature, and provide our perspective on the limitations of current restoration.

Full Text

Duke Authors

Cited Authors

  • Bernhardt, ES; Palmer, MA

Published Date

  • September 2011

Published In

Volume / Issue

  • 21 / 6

Start / End Page

  • 1926 - 1931

PubMed ID

  • 21939034

Pubmed Central ID

  • 21939034

International Standard Serial Number (ISSN)

  • 1051-0761

Digital Object Identifier (DOI)

  • 10.1890/10-1574.1

Language

  • eng