The study of total load allocation of water environmental capacity in Yuanhe River, China

Yuanhe River is a branch of the middle and lower reaches of Ganjiang River in Jiangxi Province. The Yuanhe River is a major source of drinking, irrigation, industrial, hydropower generation, and recreational water. And it flows through some heavy industry cities. So the allocation of wastewater discharge permit is a challenge in total mass control due to the conflicts between environmental equality and efficiency. In this study, we select the population, GDP, land area and pollution discharge as the allocation criterion and use the Gini coefficient to evaluate and adjust the allocation result. The result shows that we can enhance the balance between efficiency and equality by adjusting the weight of GDP in Yuanhe River. The final allocation result shows that the capacity allocation of Luxi County, Xinyu City and Yichun City are 3896 t/a, 29719 t/a and 10245 t/a respectively. The application of Gini coefficient in wastewater permits allocation more easily acceptable by stakeholders and local Environmental Protection Bureau. The results will help to management wastewater discharge and find suitable protect and treatment techniques for the Yuanhe River.