Application Of Grey System Theory On Water Environment Study In The Lake Of Wuliangsuhai

Lake environment system is generalized energy system, mechanism of the inner system is very complicated. it is difficult to be measured. Information provide by monitoring data (quantitative information, non-qualitative information) reflect a time and spatial environmental condition. Meanwhile,information parameter is part known and part unknown,that is grey. Therefore,by taking wuliangsuhai lake as research object, grey system theory as a basis,evaluated wulangsuhai lake status and characteristics of water quality and eutrophication.This paper choiced grey clustering evaluation to evaluated wuliangsuhai lake water quality in may, july and september, choiced grey situation decision to evaluated wuliangsuhai lake eutrophication status. By using of the gray connection methed, providing a row order and creating the"advantage factors"that exhibited the greatest effects on chlorophyll-a in wuliangsuhai lake.Analyzing relationship between environment factors and chlorophyll-a.Forecasting water quality of main drainage canal and eight drainage canal by using GM(1,1) model and analyzing water qualit status,establishing grey model:this model is applied to predict such as TN,TP,total hardness,pH,DO five water quality parameter of main drainage canal and eight drainage canal. the precision of the model is tested and verified by the posterior variance examination and residual method.