黄河兰州段水环境污染状况和成因分析

较详细的描述了兰州水污染现状，从工业废水和生活污水排放及黄河入河排放口排放历史和趋势进行了分析和预测，对近几年的兰州市区段污染物的主要成分、污染物来源、污染物的总量和污染物浓度，不同时期兰州市区段水质与不同断面水污染状况做了分析与对比。找出黄河兰州段水污染的主要污染物与污染源，并对造成黄河兰州段污染的原因做了归纳总结，指出黄河兰州段水污染问题需要通过合理利用水资源，控制污染物的随意排放，调整产业结构等手段来解决。

Analysis on Causation and State of Water Environment in Lanzhou Section of the Yellow River

It describes the water pollution situation in Lanzhou in detail, analyzes and forecast on the history and tendency of the Yellow River discharge outlet, industrial waste and the sanitary sewage. Analyzes the primary pollutants, its sources, total quatity and density in the urban area. In addition, it makes a contrast on the water quality in different periods and the pollution state among different profiles. And finally it points out the major pollutants and its sources in Lanzhou section of Yellow River, besides a brief summary is also made on the causation of the pollution in Lanzhou section of Yellow River, and points out the Yellow River in Lanzhou section water pollution question needs through the reasonable favorable water used resources, the control pollutant to discharge at will, methods and so on adjustmentindustrlal structure solves.