Study On Water Ecological Carrying Capacity Of Fen River Basin

With the rapid economical development in our country, many rivers have faced serious problems such as pollution, arid, and deteriorate ecological system. These problems are more serious in our country than others. For weighing the harmony degree between human economy society and ecological environment of river, the concept of water environment carrying capacity (simplified as WECC) of river is put forward. The WECC of river is the important part of natural resources carrying capacity, we can optimize arrangement of water environment and water resource, and harmonize the relationship between ecological construction, people's life and water resource environment. It is very important meaning for sustainable development district.Based on water ecology and water environment, this paper studies the WECC of Fen River. Firstly this paper combines the WECC of river with the water environmental capacity, and builds some basic theory system of WECC of river. Secondly it builds the index system of WECC by means of the carrying objects(such as population, agriculture,industry,water pollution, water resource), starting from the carrying media of WECC(water resources quantity and water quality).Finally it builds the WECC model by system dynamics, taking Fen River as an example to study the WECC of river. The main achievements obtained are as follows:(1) This paper builds the concept model of WECC of river, analyzing the critical effect factors of WECC of river. It builds the evaluation index system of WECC of river. The index system includes five subsystems of industry, agriculture, population, water resources, water pollution altogether 12 indexes. It decides of each index and subsystem by the method AHP.(2) Based on the complicacy of water environment system, this article uses system dynamics to build the system model of Fen River WECC to analyze the relationship among the indexes and systems. after examination of the effectiveness of system model, the make some proposals and imitation, finally decide the best proposal (3)Operable and specific measures to advance the WECC of Fen River are put forward, aiming at optimum program. The research is supported by ShanXi hydraulic and hydropower institute.