曹娥江干流水质有机污染时空变异分析和可生化性研究

根据2003-2005年曹娥江干流的水质监测资料，对水体中有机物污染进行综合评价，并进行时空变异分析，在此监测阶段，有机物的污染趋于缓解，但仍然属于中度污染。对各断面进行有机物污染综合评价指数的相关性分析和可生化度评价，表明上游水质改善将对下游水质的提高有直接影响；上游2#点有机物污染最为严重；整个干流在1月份有机物污染强度最大，有机物的排放量和流域的水文气象条件是其时空变化的主要因素；下游6#点受工业废水影响较大，水体的生物降解能力相对较低。

Research on Spatial and Temporal Variation and Biodegradabilityof Organic Pollution of CaoE Mainstream

Based on monitoring datum of water quality of Cao'E mainstream from 2003 to 2006,organic pollution in waterbody was synthetically evaluated,and spatial and temporal variation was analyzed.In this monitoring stage organic pollution tended to decline,but it remained medium polluting still.The result of the correlation analysis between organic pollution synthetical evaluation indexes of each section and the evaluation on biodegradability indicated that improving water quality of upper reach directely influenced improving that of lower Cao'E river.The organic pollution of Qingfeng bridge(upper 2#)section was the most serious,and the pollution degree of whole Cao'E mainstream was strongest in January.Emission of pollutant,condition of hydrology and weather of its valley were the main factors of spatial and temporal variation.The section beside 104 national highway(lower 6#) seriously influenced by industrial wastewater,and its capacity of waterboby biodegradation was lower.