Dynamic Analysis of Water Resources Supply- demand Balance about Mining Cities in Central Liaoning
辽中地区矿业城市水资源供需平衡动态分析

The mining cities in central Liaoning region are important energy production and heavy industry base in China. It is important to conduct research on their water resources supply-demand change. The framework of water resources supply-demand balance, the calculation of both useable water resources and water resource demand, and the influencing factors of water resources supply-demand balance were analyzed. Results showed that: from 1997 to 2005, the regional differences of water resources supply-demand balance among the mining cities in central Liaoning region were evident. The water resources supply-demand in Anshan was notably unbalanced, while the lack of water resources was declining, which was 0.32 ×108 m3 in 2005; the supply-demand of water resources in Fushun kept balance on the whole, the surplus of water resources was increasing, which was 5.25 ×108 m3 in 2005; for Benxi the water resources supply-demand was balanceable, the available water resources exceeded the water resource demand each year, the surplus of water resource was 8.65×108 m3 in 2005. The utilization rate of water resources in Anshan was 65.56%, while the degree of water demand was highly intense; the utilization rate of water resources in Fushun was 35.11%, while the degree of water demand was moderately highly intense; for Benxi the utilization rate of water resources was 27.96% , while the degree of water demand was moderately highly intense. The structures of water resource demand were also different among mining cities in central Liaoning region. In Anshan, the water demand of agriculture and eco-environment were primary, which accounted for 76% of the total; in Fushun, the eco-environment water demand was most significant, which accounted for 60% , the agriculture water demand accounted for only 23%; in Benxi, eco-environment water demand accounted for 67%, while industrial water demand accounted for only 15%.