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The lake Dalinuoer lake is located in the arid and semi-arid areas, this is closed lakes west of Keshiketeng County in Inner Mongolia, to their water quality analysis, evaluation, prediction and research of ecological environmental water demand, using 2008 and 2009 actual monitoring data, using principal component analysis, SPSS software as analysis tools, analysis by the three principal components can represent the original 10 water quality objectives, and retain85.842% of the original information, of which the first principal component, reflecting the amount of information, and electrical conductivity (EC), salinity (Sal), total phosphorus (TP) Etc. closely related, explain Dalinuoer Lake is more serious salinization ; using matter-element analysis method water quality evaluation, and using cluster analysis to determine the weight, The results showed that 2008 and 2009, both the water quality is GradeⅤ, and 2009 pollution was serious in 2008, the evaluation results consistent with the fuzzy comprehensive evaluation .Description of Matter Element Analysis of evaluation results more reasonable and consistent with the actual situation, more serious pollution of the Dalinuoer lake; using gray model GM (1,1) into the Lake 4 River of the Dalinuoer of water quality analysis forecasting, are pH, CODcr, BOD5, TN, TP, DO five indicators GM (1,1) model; Using functional method Eco-environmental water demand analysis, as Dalinuoer Lake Salinization is more serious, The results obtained Dalinuoer Lake Anti-salinity water demand for the 79.4×108m3, Through analysis, water the environment problems of Dalinuoer lake is more serious, protection and management Dalinuoer lake water quality is a long way arduous task.
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