HR: 1340h
AN: H43E-0409    [Abstracts]
TI: Comparison of Two Watershed Models in Developing a Nutrient Management Plan for the Napa River Watershed
AU: * Peng, W
EM: pwang@bren.ucsb.edu
AF: Donald Bren school of Environmental Science and Management, University of California, Santa Barbara, Bren Hall, UCSB, Santa Barbara, CA 93117 United States
AU: Arturo, K
EM: keller@bren.ucsb.edu
AF: Donald Bren school of Environmental Science and Management, University of California, Santa Barbara, Bren Hall, UCSB, Santa Barbara, CA 93117 United States
AB: California has identified the Napa River Watershed as impaired due to excessive nutrient loading. A nutrient management plan, which will serve as the basis for the final TMDL to be submitted to the EPA by SFRWQCB (San Francisco Regional Water Quality Control Board), was developed for the region by using distributed parameter watershed models. Two watershed models, SWAT (Soil and Water Assessment Tools) and WARMF (Watershed Analysis Risk Management Framework), were used for this study. The two models were set up for the Napa River Watershed essentially based on same data sets, with minor adaptations based on model parameterization of processes. Although in general the models produced similar results, differences in the modeling frameworks with regards to certain non-point sources, such as atmospheric deposition, agricultural management and septic systems, resulted in local and regional differences in source strength and timing. Sensitivity analyses were conducted for the two models, to determine the robustness of modeling assumptions. Similarities and dissimilarities between two models were compared, and advantages and disadvantages of two models in terms of their future role in development of a monitoring program for the TMDL development were highlighted.
DE: 0345 Pollution--urban and regional (0305)
SC: Hydrology [H]
MN: 2004 AGU Fall Meeting