Water environmental capacity analysis of Moguhu reservoir based on SMS water quality model

The Moguhu reservoir is a typical piedmont alluvial fan plain reservoir situated in the arid area of Northwest China.The water quality of Moguhu reservoir has been seriously polluted for a long time.Based on the pollution source survey and estimation of pollution load,the water quality of Moguhu reservoir was simulated by using SMS water quality model in different planning years.The water environmental capacity of the reservoir was analyzed through the distribution characteristics and evolution trends of various pollutant concentrations.The prevention and control plan for the total amount of pollution load reduction was proposed in a targeted manner.The results showed that water quality of the Moguhu reservoir continued to deteriorate into a worse than Grade V.To ensure the improvement of the water quality of the Moguhu reservoir in the future,it is necessary to reduce the discharge of pollutants in the watershed.The simulation results of the pollutant concentration field showed that controlling the upstream inlet port of the south was the key to the main pollution load reduction of the Moguhu reservoir.According to the prediction of the pollutant distribution concentration field after reduction,the water quality was obviously improved which indicated that the pollution control scheme was effective.

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