Inorganic Chemistry of Urban Runoff and Hydrologic Relationships, Bloomington, Indiana

摘要

Identification and quantification of key pollutants and the impact of storm-water runoff was carried out in the karst-controlled landscape of Bloomington, Indiana, and surrounding suburban and agricultural areas. Water quality data were obtained from 10 gaging stations and 5 subsites before and after rainfalls of differing intensities and duration. Concentrations of NO3, NH3, PO4, F, K, Fe, and Mn were increased at the sewage treatment plant and storm sewer outfalls and for several miles downstream. Values of Na, Cl, SO4, conductivity, and Zn were highest in the runoff from the most developed areas. There were no increases of NO3, NH3, PO4, and suspended sediment correlating to an increased proportion of impervious cover.