Pollution Transport in Karstby C. Warren Campbell,
Mohamed Abd El Latif,
Abstract: A new model of pollution transport in natural streams was developed and tested. Dead zone storage is modeled as a two time constant process. This approach better matches the observed persistence of concentration distribution skewness. Calibration of the model for a cave stream is in progress. Tracer dye was dropped in a cave stream and water samples collected at three downstream stations. The tracer studies were performed once during low flow and once during moderate flow. From this data, dispersion coefficients and dead zone volume ratios were determined. Once calibrated for several different flow regimes, the model can be used to develop a water pollution model for this karst watershed. The effect of rerouting of subsurface flow on mixing is discussed.
Subject Headings: Water pollution | Rivers and streams | Calibration | Caves | Probe instruments | Subsurface flow | Model tests
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