3、ofeutrophicationofwaterbodieshasdirectlyinfluencedthedevelopmentofChaohuLakeandthesurroundingcities.Though,govornmentinvestsahugeamountofmoneyforwaterpollutioncontroleveryyear,the situationis not improved.BasedontheanalysisofChaohuLakewaterenvironment,thispaper summarizesthereasonsofwaterpolluti