Uncertainty Analysis for Coupled Watershed and Water Quality Modeling Systems
Publication: Journal of Water Resources Planning and Management
Volume 132, Issue 5
Abstract
A series of uncertainty analysis methods was applied to investigate the propagation of parameter uncertainty within a coupled model system and to evaluate the effects of uncertainty on model outputs and decision-making processes. First-order error analysis showed that among a large number of model parameters, only a few significantly affected the variation in pollutant loads at the watershed outlets and concentrations in the receiving body of water, and the variation in pollutant concentrations is greater than the variation in pollutant loads. The uncertainty analysis regarding the loads and concentrations showed different patterns, underscoring the importance of a complete uncertainty analysis and the need for an explicit quantification of the errors associated with the predicted loads. Monte Carlo simulation showed that best management practice scenarios considered as a safe scheme based on a deterministic model could actually lead to a significant risk of violating the water quality standards when model uncertainty is considered. With a modeling framework that considers uncertainty, feasible alternatives can be evaluated and ranked based on their risks of exceeding the target water quality criteria.
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References
Arhonditsis, G. B., and Brett, M. T. (2004). “Evaluation of the current state of mechanistic aquatic biochemical modeling.” Mar. Ecol.: Prog. Ser., 271, 13–26.
Beck, M. B. (1987). “Water quality modeling: A review of the analysis of uncertainty.” Water Resour. Res., 23(8), 1393–1442.
Bicknell, B. R., Imhoff, J. C., Kittke, J. L., Jr., and Donigian, A. S., Jr. (1996). Hydrological simulation program-FORTRAN, user’s manual for release 11, Environmental Research Laboratory, Athens, Ga.
Binley, A. M., Beven, K. J., Calver, A., and Watts, L. G. (1991). “Changing responses in hydrology: Assessing the uncertainty in physically based model predictions.” Water Resour. Res., 27(6), 1253–1261.
Bobba, A. G., Singh, V. P., and Bengtsson, L. (1996). “Application of first-order and Monte Carlo analysis in watershed water quality models.” Water Resour. Manage., 10, 219–240.
Brown, L. C., and Barnwell, T. O., Jr. (1987). “The enhanced stream water quality models QUAL2E and QUAL2E-UNCAS: Document and user manual.” Rep. No. EPA 600/3-87/007, U.S. Environmental Protection Agency, Athens, Ga.
Chesapeake Bay Program (CBP). (1994). “Watershed model application to calculate bay nutrient loadings—final findings and recommendations.” The Modeling Subcommittee of the Chesapeake Bay Program, Rep. No. EPA 903-R-94-042, U.S. Environmental Protection Agency, Washington, D.C.
Cloe, W. W., Feaser, S. R., Sirois, D., Hein-Harmon, C., and Duval, G. E. (1999). “Hydrological and water quality characteristics of Swift Creek Reservoir and watershed, 1997.” Swift Creek Water Treatment Plant Laboratory, Chesterfield County Department of Utilities, Chesterfield, Va.
Cole, T. M., and Wells, S. A. (2000). “CE-QUAL-W2: A two-dimensional, laterally averaged, hydrodynamic and water quality model, Version 3.0.” Instruction Rep. No. EL-2000, U.S. Army Engineering and Research Development Center, Vicksburg, Miss.
Di Toro, D. M., and Van Straten, G. (1979). “Uncertainty in the parameters and predictions of phytoplankton models.” International Institute of Applied Systems, Laxenburg, Austria, WP-79-27.
Guyonnet, D., Come, B., Perrochet, P., and Parriaux, A. (1999). “Comparing two methods for addressing uncertainty in risk assessments.” J. Environ. Eng., 125(7), 660–666.
Haan, C. T., Storm, D. E., Al-Issa, T., Prabhu, S., Sabbagh, G. J., and Edwards, D. R. (1998). “Effect of parameter distribution on uncertainty analysis of hydrologic models.” Trans. ASAE, 41(1), 65–70.
Haan, C. T., and Zhang, J. (1996). “Impact of uncertain knowledge of model parameters on estimated runoff and phosphorus loads in the lake Okeechobee basin.” Trans. ASAE, 39(2), 511–516.
Hession, W. C., Storm, D. E., and Haan, C. T. (1996). “Two-phase uncertainty analysis: An example using the Universal Soil Loss Equation.” Trans. ASAE, 39(4), 1309–1319.
Hession, W. C., and Storm, D. E. (2000). “Watershed-level uncertainties: Implications for phosphorus management and eutrophication.” J. Environ. Qual., 29, 172–1179.
Laroche, A. M., Gallichand, J., Lagace, R., and Pesant, A. (1996). “Simulating atrazine transport with HSPF in an agricultural watershed.” J. Environ. Eng., 122(7), 622–630.
Lei, J., and Schilling, W. (1994). “Parameter uncertainty propagation analysis for urban rainfall runoff modelling.” Water Sci. Technol., 29(1–2), 145–154.
Malone, R., Bowles, D. S., Windham, M. P., and Grenney, W. J. (1983). “Comparison of techniques for assessing effects of loading uncertainty upon a long term phosphorus model.” Appl. Math. Model., 7, 11–18.
Melching, C. S., and Bauwens, W. (2001). “Uncertainty in coupled nonpoint source and stream water-quality models.” J. Water Resour. Plan. Manage., 127(6), 403–412.
Melching, C. S., and Yoon, C. G. (1996). “Key sources of uncertainty in QUAL2E model of Passaic River.” J. Water Resour. Plan. Manage., 122(2), 105–113.
Omlin, M., Brun, R., and Reichert, P. (2001). “Biogeochemical model of Lake Zurich: Sensitivity, identifiably and uncertainty analysis.” Ecol. Modell., 141, 105–123.
Song, Q., and Brown, L. C. (1990). “DO model uncertainty with correlated inputs.” J. Environ. Eng., 116(6), 1164–1180.
Srinivasan, M. S., Hamlett, J. M., Day, R. L., Sams, J. I., and Petersen, G. W. (1998). “Hydrologic modeling of two glaciated watersheds in northeast Pennsylvania.” J. Am. Water Resour. Assoc., 34(4), 963–978.
Tsihrintzis, V. A., Fuentes, H. R., and Gadipudi, R. K. (1996). “Modeling prevention alternatives for nonpoint source pollution at a watershed in Florida.” Water Resour. Bull., 32(2), 317–331.
USEPA (1999). “HSPFParm: An interactive database of HSPF model parameters, version 1.0.” Rep. No. EPA 823-R-99-004, U.S. Environmental Protection Agency, Washington, D.C.
Water Quality Research Group (WQRG). (2005). “CE-QUAL-W2, hydrodynamic and water quality model.” Application history, ⟨http://www.ce.pdx.edu/w2/⟩ (Aug. 20, 2005).
Zhang, H. X. (2001). “The critical flow-storm approach and uncertainty analysis for the TMDL development process.” Ph.D. dissertation, Univ. of Virginia, Charlottesville, Va.
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© 2006 ASCE.
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Received: Sep 16, 2004
Accepted: Dec 21, 2005
Published online: Sep 1, 2006
Published in print: Sep 2006
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