城市非点源污染的初步探讨

非点源污染是造成环境污染的重要因素之一，是指溶解的或固体的污染物从非特定的地点，在降水和径流的冲刷作用下，通过径流过程汇入受纳水体，而引起的水体污染，是相应于点源的重要污染源类型。非点源污染的危害与严重性随着点源污染控制能力的提高而逐渐表现出来。介绍了城市非点源污染的国内外研究现状，分析比较了城市非点源污染的研究方法。通过实地采集水样与实验室化验，分析了由城市降雨径流造成水环境污染的程度、污染物类型和各污染物浓度随径流时间的变化过程，进行了初步的探讨，并提出了一些规律性结论。

A preliminary investigation of urban nonpoint source pollution

Nonpoint source pollution(NPS) is one of the important factors that cause environmental pollution. It is defined as the dissolved or solid pollutants running into the water bodies and making them polluted under the scouring effect of the rainfall runoff from the steadfast positions, and is recognized as a vital pollution source compared to the point source pollution. The jeopardy and ponderancy of NPS is rising with the developing capability of point source pollution control. It comprehensively introduces the current situation of NSP research at home and abroad, analyzes and compares the exploration methods of NSP. By monitoring on the spot, it analyzes the situation of the water pollution caused by urban rainfall-runoff, the varieties of pollutants, and the variation of pollutant concentration with time. After a preliminary study, it presents a series of NPS'regulations.