Post‐Audit of Lake Model Used for NPS Management
Publication: Journal of Environmental Engineering
Volume 109, Issue 6
Abstract
Ability of a continuous simulation model to predict nonpoint pollution loads and reservoir water quality was reevaluated for conditions significantly different from those used for calibration/verification. Lower pollution loadings than calibration/verification period resulted from start‐up of regional advanced wastewater treatment (AWT) plant and significant switchover from high tillage cropland practices within the reservoir's 580 sq mile drainage area. Use of both parametric and nonparametric statistical tests to assess model goodness‐of‐fit is demonstrated. Nonpoint pollution loading factors from small testing sites are reverified with gaging data at the mouths of two watersheds representing more than 90% of reservoir drainage area. Simulated water quality statistics for two‐layer reservoir are compared with daily average of recorded data from 7 monitoring stations. There was typically no significant difference between simulated and recorded statistics on nonpoint pollution loadings and concentrations of critical indicators of lake eutrophication. Results are further evidence of the model's reliability for water quality studies of land use plans or control measures that also produce major changes in pollution loadings.
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References
1.
Donigian, A. S., and Crawford, N. H., “Modeling Nonpoint Pollution from the Land Surface,” EPA‐600/3‐76‐083, U.S. Environmental Protection Agency, Environmental Research Laboratory, Athens, Ga., July, 1976.
2.
Donigian, A. S., and Waggy, W. H., “Simulation—A Tool for Water Resource Management,” Water Resources Bulletin, Vol. 10, No. 2, Apr., 1974, pp. 229–244.
3.
“Follow‐up Assessments of Alternate AWT Operating Rules with Occoquan Basin Computer Model,” Northern Virginia Planning District Commission, prepared for Camp, Dresser, McKee, Inc., Boston Mass., Feb., 1980.
4.
Grizzard, T. J., Hartigan, J. P., and Randall, C. W., “The Development of Water Quality Management Plans Using Data from Automatic Stormwater Monitoring Networks,” Water Science Technology, Vol. 13, 1981, pp. 95–102.
5.
Hartigan, J. P., et al., “Areawide and Local Frameworks for Urban Nonpoint Pollution Management in Northern Virginia,” Stormwater Management Alternatives, J. T. Tourbier, and R. Westmacott, eds., University of Delaware, Newark, Del., Apr., 1980, pp. 211–245.
6.
Hartigan, J. P., Lumb, A. M., Smullen, J. T., Grizzard, T. J., and Alcivar, P. A., “Calibration of Urban Nonpoint Pollution Loading Models,” presented at the August 9–11, 1978, 26th Annual ASCE Hydraulics Division Speciality Conference on Verification of Mathematical and Physical Models in Hydraulic Engineering, held at College Park, Md., pp. 363–372.
7.
Hartigan, J. P., Quasebarth, T. F., and Southerland, E., “Use of Continuous Simulation Model Calibration Techniques to Develop Nonpoint Pollution Loading Factors,” Proceedings of Stormwater and Water Quality Management Modeling Users Group Meeting: March 25–26, 1982, (EPA‐600/9‐82‐015), U.S. Environmental Protection Agency, Environmental Research Laboratory, Athens, Ga., 1982, pp. 101–127.
8.
Hollander, M., and Wolfe, D. A., Nonparametric Statistical Methods, John Wiley & Sons, Inc., New York, N.Y., 1973.
9.
“Hydrocomp Simulation Programming: Water Quality Simulation Operations Manual,” Hydrocomp, Inc., Palo Alto, Calif., 1977.
10.
Jettmar, R. U., Young, C. K., Perez, A. I., and Oros, R., “Dynamic Water Quality Modeling in Southeast Florida,” Journal of the Environmental Engineering Division, ASCE, Vol. 106, No. EE1, Proc. Paper 15173, Feb., 1980, pp. 105–124.
11.
Johanson, R. C., Imhoff, f., and Davis, H. H., “Users Manual for Hydrological Simulation Program—FORTRAN (HSPF),” EPA‐600/9‐80‐015, Laboratory, Athens, Ga., Apr., 1980.
12.
“Methods for Chemical Analysis of Water and Wastes,” EPA‐625/6‐74‐003, U.S. Environmental Protection Agency, National Environmental Research Center, Washington, D.C., 1974.
13.
“The Occoquan Basin Computer Model: Calibration, Verification, and User's Manual,” Hydrocomp, Inc., prepared for Northern Virginia Planning District Commission, Falls Church, Va., May, 1978.
14.
“Occoquan Basin Computer Model: Summary of Calibration Results,” Northern Virginia Planning District Commission, Falls Church, Va., Jan., 1979.
15.
Randall, C. W., Grizzard, T. J., and Hoehn, R. C., “Effect of Upstream Control on a Water Supply Reservoir,” Journal of Water Pollution Control Federation, Vol. 50, No. 12, Dec., 1978, pp. 2687–2702.
16.
Thomann, R. V., “Verification of Water Quality Models,” Journal of Environmental Engineering Division, ASCE, Vol. 108, No. EE5, Oct., 1982, pp. 923–940.
17.
Winter, T. C., “Uncertainties in Estimating the Water Balances of Lakes,” Water Resources Bulletin, Vol. 17, No. 1, Feb., 1981, pp. 82–115.
18.
Zison, S. W., et al., “Rates, Constants, and Kinetics Formulations in Surface Water Quality Modeling,” EPA‐600/3‐78‐105, U.S. Environmental Protection Agency, Environmental Research Laboratory, Athens, Ga., Dec., 1978.
Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 109 • Issue 6 • December 1983
Pages: 1354 - 1370
Copyright
Copyright © 1983 ASCE.
History
Published online: Dec 1, 1983
Published in print: Dec 1983
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