Study on water resources optimization allocation and its sustainability development in Zhangjiakou

Water scarcity is an important constrict factor for economy development and eco-environment protection in Zhangjiakou. In this paper, based on analysis of water resources system in Zhangjiakou, a multi-source water coordination allocation model has been established, which combining water quality and water quantity. The maximum economy benefit as objective function, the maximum available water and minimum water requirement as constricts, the water resources optimization allocation model has been carried out. After meet the water requirement of eco-environment, the water resources has been distributed by using the model under different frequency in different planning years. The results indicate the ration of water shortage respectively are 11.6%, 12.5% in 2025 and 2030, and the water scarcity would be increased during dry year or very dry year. The water shortage mainly occurred in Haihe river basin. The underground water is main source for water supply, and utilization of reclaimed water is gradually increasing. The main water user is agriculture sector in Zhangjiakou, and the water use by agriculture is gradually decreasing. The sustainability development measure have been proposed for water exploitation of Zhangjiakou in the future, which provides a support for harmonious development between eco-society and environment protection.