Study on Pollution Load Control in Water-Diluting Channel──An Example of Water-Diluting Channel of the Yangtze River Water Diversion in Northern Jiangsu Province

Based on the hydrological and geographical features of the plain river network region in the northern Jiangsu province,a model on pollution load control is established.The model is used to calculate the water environmental carrying capacity,the pollutant reduction amount,or remaining environmental carrying capacity based on pollutant discharge amount in the area influenced by water-diluting channel of the Yangtze River water diversion.Then pollution load control strategies are studied.Results show that the water quality of the main river reaches downstream the water-dilution channel can meet the water quality requirements.But point pollution is pretty intensive,which can lead to deterioration of water quality at the tributaries.So water environment quality can be improved by increasing the water diversion form the Yangtze River.