农用化学物对河网地区地表水质的影响

Effects of Agricultural Chemicals on the Surface Water Quality in River Network Area

为了解平原河网地区农用化学物(化肥和农药)对地表水质的污染程度,调查了嘉兴市某农区在施肥和雨后,径流对地表水质的影响,初步揭示了水质与农时和降雨情况的关系。调查表明,农业非点源污染受农时、降雨的影响较大,其中农时的影响更大,施肥后短时间内水质即下降,变化非常显著。

In order to understand the degree of pollution of river network area, investigation of effects of runoff after fertilization and precipitation on surface water quality were made. The result indicated that pollution during cultivation time and precipitation were more serious, and after a short interval of fertilization, the water quality of surface water deteriorated obviously.