岷江乐山段有机污染状况及变化趋势分析

Analysis of Changing Trends and Characteristics of OrganicPollution of Minjiang River in Leshan City

“三氧”是衡量水质有机污染的重要指标。本文针对岷江乐山段地面水质污染属有机污染的特点，以“三氧”为依据研究了其有机污染的变化趋势，并对其污染状况进行了分析，提出了防治污染的对策和建议。

DO , COD and BOD5 are the important indexes which can be used to measure the organic pollution in water. As organic pollution predominates the pollution of Minjiang River,one of the tributories of the Yangtze,in Leshan city,the changing trends of pollution are studied based on the data of DO,COD and BOD5.After analyzing the cause of pollution,suggestions to prevent and control it are put forward.