A load model based on antecedent dry periods for pollutants in stormwater
| Autor: | Erik R. Christensen, Puripus Soonthornnonda |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Biochemical oxygen demand
Rain Stormwater chemistry.chemical_element Water Purification Metals Heavy Water Movements Environmental Chemistry Water Pollutants Cities Waste Management and Disposal Water Science and Technology Total suspended solids Vehicle Emissions Pollutant Hydrology Ecological Modeling Phosphorus Environmental engineering Models Theoretical Pollution Mercury (element) Fecal coliform Deposition (aerosol physics) chemistry Environmental Pollution Mathematics Environmental Monitoring |
| Zdroj: | Water environment research : a research publication of the Water Environment Federation. 80(2) |
| ISSN: | 1061-4303 |
| Popis: | A load model for stormwater constituents is proposed that describes mass retained on the drainage area after previous storms, as a function of a weighted sum of previous antecedent dry periods. It was used to compute the event load for 14 constituents--zinc, copper, cadmium, nickel, chromium, lead, mercury, silver, total suspended solids (TSS), E. coli, fecal coliform, total soluble phosphorus, total phosphorus, and 5-day biochemical oxygen demand. The results show acceptable fits for most constituents based on over 400 rain events (2000 to 2004) in Milwaukee, Wisconsin. Considering the retained pollutant mass after one previous storm rather than assuming the area to be clean after the previous storm gives more accurate results for all constituents, except TSS and silver. The model can be used for mixed land-use areas. The ratios of deposition fluxes of zinc and individual metals were determined at a major parking lot producing a profile characteristic of automobile emissions. |
| Databáze: | OpenAIRE |
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