Coupled Dynamic Streamflow-Temperature Models

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Abstract
Current interest in stream temperature prediction stems largely from concern for the possible deleterious environmental consequences of thermally polluted surface waters. Stream temperature is an important determinant of the solubility of dissolved gases, biological reaction kinetics, the distribution of fish and lower forms of aquatic life, and the efficiency of water treatment for domestic and industrial use. This paper describes the Dynamic Stream Temperature Model (DSTEMP). The model is suitable for prediction of stream temperatures over a diurnal cycle and over extended periods of time. DSTEMP may be used for unsteady flow conditions by linkage with a dynamic streamflow routing model (DNRT). Alternatively steady flow conditions may be specified. Data requirements are realistic in terms of data types usually collected by the National Weather Service, NOAA, and the United States Geological Survey. In addition to describing the model an application of DNRT-DSTEMP to the Brazos-Little Rivers, Texas, is included to illustrate that the models provide a practical tool for streamflow-stream temperature forecasting.

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