Spatial Adequacy of Nasqan Water Quality Data in Ohio River Basin
Publication: Journal of Environmental Engineering
Volume 115, Issue 1
Abstract
Water quality data from 30 stations of the National Stream Quality Accounting Network (NASQAN) in the Ohio River basin were examined for spatial adequacy. A direct statistical test of differences between two sample means (for small sample size and unknown population variances) found that for over onehalf of the 53 water quality parameters, differences in water quality could not be distinguished for more than one‐third of the station pairs. An indirect statistical approach, correlating mean water quality to 136 possible explanatory basin characteristics, resulted in reasonable cause‐effect relationships for only 23 parameters. Based on a method developed to determine a spatially adequate sample size, it is recommended that the current bimonthly or quarterly sampling frequency be increased to monthly for all parameters and that the current annual reporting period be increased to four years. Other suggestions to make the system more cost‐effective are included.
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References
1.
Briggs, J. C., and Ficke, J. F. (1977). “Quality of rivers of the United States, 1975 water year—based on the National Stream Quality Accounting Network (NASQAN). “Open‐File Report 78‐200, U.S. Department of the Interior, Geological Survey, Reston, Va.
2.
Ficke, J. F., and Hawkinson, R. O. (1975). “The National Stream Quality Accounting Network (NASQAN)—some questions and answers.” Circular 719, U.S. Department of the Interior, Geological Survey, Reston, Va.
3.
Duncan, A. J. (1965). Quality control and industrial statistics. Richard D. Irwin, Inc., Homewood, Ill.
4.
Hirsch, R. M., Slack, J. R., and Smith, R. A. (1982). “Techniques of trend analysis for monthly water quality data.” Water Resour. Res., 18(1), 107–121.
5.
SAS Institute. (1979). SAS user's guide. SAS Institute, Inc., Cary, N.C.
6.
Smith, R. A., Alexander, R. B., and Wolman, M. G. (1987a). “Water quality trends in the nation's rivers.” Science, 235(Mar.), 1607–1615.
7.
Smith, R. A., Alexander, R. B., and Wolman, M. G. (1987b). “Analysis and interpretation of water‐quality trends in major U.S. rivers, 1974–81.” Water‐Supply Paper 2307, U.S. Department of the Interior, Geological Survey, U.S. Government Printing Office, Washington, D.C.
8.
Smith, R. A., Hirsch, R. M., and Slack, J. R. (1982). “A study of trends in total phosphorus measurements at NASQAN stations.” Water‐Supply Paper 2190, U.S. Department of the Interior, Geological Survey, U.S. Government Printing Office, Washington, D.C.
9.
Sykes, R. M., Whitlatch, E. E., and Skalsky, D. S. (1983). Analysis of NASQAN water quality data in the Ohio River basin, Volume 5: Adequacy of the National Stream Quality Accounting Network (NASQAN) in the Ohio River basin. Final Report to U.S. Department of the Interior, Geological Survey; Department of Civil Engineering, The Ohio State University, Columbus, Ohio.
10.
U.S. Department of Commerce. (1986). Statistical abstract of the United States 1987. U.S. Department of Commerce, U.S. Government Printing Office, Washington, D.C.
11.
U.S. Department of Commerce. (1987). Business conditions digest. U.S. Department of Commerce, U.S. Government Printing Office, Washington, D.C.
12.
U.S. Department of the Interior. (1987). The Interior budget in brief: fiscal year 1988 highlights. U.S. Department of the Interior, U.S. Government Printing Office, Washington, D.C.
13.
U.S. Geological Survey. (1976, 1980, 1986). United States geological survey yearbook, fiscal year 1975, 1979, 1985. U.S. Geological Survey, U.S. Government Printing Office, Washington, D.C.
14.
Wells, F. C., and Schertz, T. L. (1983). Statistical summary of daily values data and trend analysis of dissolved‐solids data at National Stream Quality Accounting Network (NASQAN) stations. Water Resources Investigations Report 83‐4172, U.S. Department of the Interior, Geological Survey, Austin, Tex.
15.
Whitlatch, E. E., et al. (1982a). Analysis of NASQAN water quality data in the Ohio River basin, Volume 1: Data sources and data reduction techniques. Final Report to U.S. Department of the Interior, Geological Survey by the Department of Civil Engineering, The Ohio State University, Columbus, Ohio.
16.
Whitlatch, E. E., et al. (1982b). Analysis of NASQAN water quality data in the Ohio River basin, volume 2: Data presentation and basin descriptions. Final Report to U.S. Department of the Interior, Geological Survey by the Department of Civil Engineering, The Ohio State University, Columbus, Ohio.
17.
Whitlatch, E. E., Sykes, R. M., and Shaffer, T. R. (1982c). Analysis of NASQAN water quality data in the Ohio River basin, volume 3: Statistical analysis of water quality data. Final Report to U.S. Department of the Interior, Geological Survey by the Department of Civil Engineering, The Ohio State University, Columbus, Ohio.
18.
Whitlatch, E. E., Sykes, R. M., and Martin, M. J. (1983). Analysis of NASQAN water quality data in the Ohio River basin, Volume 4: Correlation and regression analysis between disaggregated basin characteristics and water quality. Final Report to U.S. Department of the Interior, Geological Survey by the Department of Civil Engineering, The Ohio State University, Columbus, Ohio.
Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 115 • Issue 1 • February 1989
Pages: 173 - 191
Copyright
Copyright © 1989 ASCE.
History
Published online: Feb 1, 1989
Published in print: Feb 1989
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