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CITY OF LINO LAS 10/24/94 Water Quality Program NTRM Nitrogen, Tillage, Residue Management Model UTM Unified Transport Model (Oak Ridge National Laboratory) SWMM Storm Water Management Model (U.S. Environmental Protection Agency) STORM Storage, Treatment, Overflow, Runoff Model (U.S. Army Corps of Engineers) P8 Program for Predicting Polluting Particle Passage through Pitts, Puddles and Ponds (William W. Walker Jr.) DEPOND Detention Pond Design Model (Robert E. Pitt, Department of Civil Engineering, University of Alabama Birmingham and John Voorhees, MSCEE). Receiving water quality models simulate water quality conditions in streams, rivers, lakes, reservoirs, and estuaries. Early models included prediction of dissolved oxygen (DO) and biochemical ;oxygen demand (BOD). Recent models consider nutrient cycling, sediment transport, and other biological processes. Most receiving water quality models require estimates of inflow and constituent concentrations. Such quality models include CE- QUAL -R1, a comprehensive reservoir water quality -- model, and QUALII - Stream Quality Model, a stream flow model that can be used to analyze the effects of point and nonpoint sources on water quality in the stream. Groundwater quality models are used to study aquifer drawdown as a result of drainage, irrigation pumping, and water quality characteristics. However, due to complexity of problems, and the difficulty on defining the physical environmental of an aquifer, groundwater modeling lags well behind surface water modeling. In 1982, the U.S. Geological Survey published a reference to surface flow and water quality models, Computer Programs for Modeling Flow and Water Quality of Surface Streams. The booklet briefly Local Water Management Plan SEH No. A- LINOL9402.00 Reference Document Page 47