Study on the calculation of water environmental capacity and water pollution control strategy of Beihai City

The water environmental capacity calculation was essential for the water environmental protection.By analyzing the water environmental features of Beihai City,the land control units and the corresponding water environmental calculation units were divided.On the basis of the hydrologic condition design and the target of water quality protection,one-dimension water environment capacity models for the normal reach and tidal reach were selectively applied to calculate the water environmental capacity of each river respectively.Considering the offshore environmental capacities,the available environmental capacity for each control unit of Beihai City was evaluated base on the current loads of point and non-point pollutant sources within the unit.Finally,the pollution control measures were put forward.