Sampling and Analysis of Stormwater Runoff from Urban and Semi-Urban/Rural Watersheds,

摘要

Stormwater runoff samples were collected and analyzed from urban and semi-urban/rural watersheds located in West Lafayette,Ind. Preliminary sampling was performed in order to develop sampling methodology;and to determine the importance of sampling frequency,duration on the resultant stormwater pollutographs. The effects of total rainfall,rainfall intensity,and antecedent dry period on the runoff quality were also determined. The data clearly showed a significant difference in the pollutional concentration of BOD and suspended solids between the urban and semi-urban/rural watersheds. The peak concentration was almost always higher in the urban watershed,being 1-2times higher in suspended solids and 8-9times higher in BOD.