Abstract:

Given the current concerns with water resources sustainable utilization under the background of socioeconomic rapid development,water resources threshold including its definition and meaning based on the natural and social characteristic of water resources is studied.According to the research,water resources threshold can be described with the coupling of water resources quantity threshold in natural system and its allocation ratio threshold in the socioeconomic system.Then given an example of Tai Lake Basin,the water resources threshold is calculated.The results show that the water resources quantity threshold of the Tai Lake is 1788×108 m3.According to the current economic development and its future plans in the target,the water resources threshold in the socioeconomic system is 1564×108 m3 under the restriction of natural ecology system water demand and water environmental capacity of the Tai Lake.The ratio of water resources threshold in the socioeconomic system is 531%, and the ratio in natural ecology system is 469%.It demonstrates that natural ecology system and the sustainable development idea of harmony between human and water are more focused in the Tai Lake.The ratio threshold of water resources allocation between different industries is domestic consumption 98%,primary industry 266%,secondary industry 582%,and tertiary industry 54% respectively,which provides profitable information for water resources sustainable development and utilization in the Tai Lake Basin