The Ma'anshan section of the Yangtze River is the most important water source of Ma'anshan and the section still collect city's industrial wastewater and domestic sewage. Therefore,it is more important to establish the evaluation and prediction model of water quality which can predict the effect of pollution discharge on water quality in Ma'anshan section of the river. The influence scope and extent of pollution discharge on water quality could be forecasted through establishing the two dimensional simulati...