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PC - POLLUTANT ROUTING MODEL (PC-PROUTE)
Description:
The PC - Pollutant Routing Model (PC-Proute) is a simple first order decay routing model that estimates aqueous pollutant concentrations on a reach by reach stream flow basis. PC-Proute is similar to the RGDS model; however it utilizes an improved method of estimating average reach concentration of a pollutant. The Office of Science and Technology in the Office of Water as part of their TMDL program has a need for a simple pollutant routing model which can estimate point source and non-point source pollutant concentrations. The basic functions include the following: a. Downstream concentration modeling of point and non-point source pollutants. Stream segments of interest may be identified as: 1. all reaches a specified number of miles downstream of a specified upstream reach or reaches; 2. all reaches a specified number of miles upstream of a downstream reach or reaches; 3. all reaches within a specified USGS stream cataloging unit. b. For each reach retrieval method described above, discharge facilities can be identified by reach for all modeled reaches. It is possible to associate one or more point source discharges with each modeled reach. c. For each reach, it is possible to identify points for water sampling or withdrawal. The model calculates final concentrations for each of these points. d. It is possible to associate a non-point source load with each modeled reach. e. Pollutant chemical data supported includes: name, CAS, first order decay rate for a single chemical and growth of a daughter chemical. f. The system supports transport and decay for two flow regimes: 7Q10 low flow and mean flow. g. Model output includes: 1. A summary of the input data, 2. A table of reaches, length, average concentration, final concentration, and final concentration for a child decay product, 3. A table describing sampling or withdrawal sites; data includes site information, reach, mile point, pollutant final concentration and child final concentration.