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Chemical composition and spatial variation of bulk precipitation at a coastal plain watershed in South Carolina

Publication ,  Journal Article
Richter, DD; Ralston, CW; Harms, WR
Published in: Water Resources Research
January 1, 1983

Bulk precipitation was collected for analysis of ionic constituents at eight rainfall stations over a 4‐year period at a 500‐ha watershed in the Lower Coastal Plain of South Carolina. Mean annual deposition rates of ions in greatest supply, Cl−, SO42− ‐S, Ca2+, and Na+, were respectively 14.2, 7.51, 5.69, and 5.66 kg/ha. Annual deposition rate for total inorganic N (NH4+ −N plus NO3− −N) was about 2.6 kg/ha and for orthophosphate‐P about 0.12 kg/ha. Spatial variation of annual depositions to the eight rainfall stations was smallest for SO42−, NO3−, and Ca2+, with coefficients of variation (CV) less than 10%. Variation of annual inputs to the eight collectors was intermediate for Mg2+, Cl−, H+, and Na+ with CV ranging between 13.9 and 21.5%, whereas the CV for annual inputs of NH4+, PO43−, and K+ exceeded 30%. Sample size estimates for this 500‐ha watershed indicated that 19 collectors should provide estimates of the annual bulk precipitation inputs within 10% of true means for 7 of 10 ions (SO42−, NO3−, Ca2+, Mg2+, Cl−, H+, and Na+) and that more than 35 collectors would be necessary to provide similar confidence intervals for annual inputs of NH4+, PO43−, and K+ (± 10% at P < 0.05). Although estimates of annual bulk precipitation inputs may be quite variable over local areas, control of sampling errors can be gained by increasing the number of collectors. This paper is not subject to U.S Copyright. Published in 1983 by the American Geophysical Union.

Duke Scholars

Published In

Water Resources Research

DOI

EISSN

1944-7973

ISSN

0043-1397

Publication Date

January 1, 1983

Volume

19

Issue

1

Start / End Page

134 / 140

Related Subject Headings

  • Environmental Engineering
  • 4011 Environmental engineering
  • 4005 Civil engineering
  • 3707 Hydrology
  • 0907 Environmental Engineering
  • 0905 Civil Engineering
  • 0406 Physical Geography and Environmental Geoscience
 

Citation

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Richter, D. D., Ralston, C. W., & Harms, W. R. (1983). Chemical composition and spatial variation of bulk precipitation at a coastal plain watershed in South Carolina. Water Resources Research, 19(1), 134–140. https://doi.org/10.1029/WR019i001p00134
Richter, D. D., C. W. Ralston, and W. R. Harms. “Chemical composition and spatial variation of bulk precipitation at a coastal plain watershed in South Carolina.” Water Resources Research 19, no. 1 (January 1, 1983): 134–40. https://doi.org/10.1029/WR019i001p00134.
Richter DD, Ralston CW, Harms WR. Chemical composition and spatial variation of bulk precipitation at a coastal plain watershed in South Carolina. Water Resources Research. 1983 Jan 1;19(1):134–40.
Richter, D. D., et al. “Chemical composition and spatial variation of bulk precipitation at a coastal plain watershed in South Carolina.” Water Resources Research, vol. 19, no. 1, Jan. 1983, pp. 134–40. Scopus, doi:10.1029/WR019i001p00134.
Richter DD, Ralston CW, Harms WR. Chemical composition and spatial variation of bulk precipitation at a coastal plain watershed in South Carolina. Water Resources Research. 1983 Jan 1;19(1):134–140.
Journal cover image

Published In

Water Resources Research

DOI

EISSN

1944-7973

ISSN

0043-1397

Publication Date

January 1, 1983

Volume

19

Issue

1

Start / End Page

134 / 140

Related Subject Headings

  • Environmental Engineering
  • 4011 Environmental engineering
  • 4005 Civil engineering
  • 3707 Hydrology
  • 0907 Environmental Engineering
  • 0905 Civil Engineering
  • 0406 Physical Geography and Environmental Geoscience