Shape of Storm Pollutograph from the Four Different Rural Watersheds

by Youngchul Kim,
Jaesoo Lee,
Wan-Joong Kim,

Document Type: Proceeding Paper

Part of: Watershed Management and Operations Management 2000


(Abstract only) Just as a hydrograph describes the flow rate of water for a storm event, a pollutograph shows the rate at which pollutants dissolved or suspended in the runoff are transported. Shapes of hydrograph and peak flow rates vary from types of the watersheds such as slope, cover, storage, and land use. In this study, four small and isolated rural watersheds (A, B, C, and D) were selected to investigate if shape of the pollutographs generated from storm events could be characterized and predictable. Watersheds used for this purpose mostly consist of irrigated and/or dryland croplands and forestland, but they have their own distinctive drainage characteristics. At the outlets of these rural watersheds, runoff water was manually sampled during three precipitation events from June 1999 to August 1999. For the single storm event, more than fifteen runoff samples were collected during the entire period of rain. Measured water quality parameters include pH, Alkalinity, Conductivity, COD, filtered-COD, SS, Turbidity, T-N, NH,-N, NO,-N, NO,-N, and T-P, PO,-P. These parameters were used for characterizing and comparing detailed runoff pollutographs.

Subject Headings: Watersheds | Water pollution | Runoff | Stormwater management | Storms | Rural areas | Water quality

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