Loss Characteristics of Non-point Pollutant from a Mixed Agriculture Watershed

In order to explore the temporal and spatial variability of non-point source pollution in an agriculture watershed, water quality quantity characteristics five flood events at Shuangqiao station Siheshui watershed (south China) were monitored. Five pollutants, including BOD5, TSS, TP, TN, NH3-N, measured analyzed. The pollutant concentrations load-transport rates investigated. It is shown that are remarkably larger than those non-flood events. sequences peak values between parameters runoff flows explored. indicates time interval would be short if high-intensity rainfall occurred initial period a event. Most preceded flow peaks. correlation coefficients TSS other there significant TP