大凌河锦州段近年COD状况分析

对大凌河锦州段近年ＣＯＤ状况进行监测可见，大凌河枯水期水质污染严重．指出了对大凌河的水质治理，仍是“九五”期间不容忽视的重要课题．

The Analysis on COD Situation in Jinzhou Section of Daling River in Recent Years

Based on the monitoring data and from the aspect of statistics,this paper studies the yearly tendency of COD changes of Jinzhou section of Daling river,discloses the regularity and influencing factors of the COD variation in time and space and then builds up a chart on this variation.By analysing,this paper concludes that the main reason of the serious pollution in Daling river is the lack of rainfall in spring and the low runoff volumes of the river.So it is still an indispensable and important task to treatment Daling river during the ninth five-years plan.