| In recent years, the water shortage and pollution are increasingly serious. In the socialistic market economy system, it is urgent for us to reckon water practicality and its value. To make the social progress and economy development harmony with the water resource each other. The reasonable water price will be an important way to adjust the water consumption.Taihu basin is a main developed area in our country, as well as an area of serious water resource problems. As a result, the date in 2000 about the plain river network of the area is selected to be the study object and the assessments of water resource value is discussed.Firstly, the water quantity and quality calculation are programmed depend on the data that could be gained.Secondly, according to the summarization of various methods of water resource value assessment, gray theory method is selected to analyze and estimate the study contents. Based on the knowledge system of gray theory, gray theory model which is an intergraded method of water resource value assessment is brought to bear.Thirdly, three water quality indexes BOD5, COD and NH3—N, are selected to be the factors, and the average water quality in 2000 of the river network is evaluated. The result shows that the general water quality of plain river network in Taihu Basin is rather bad, as most average water quality of each plain subarea is class IV or even worse. Water quality is affected greatly by water resources self-circs, population and economic development.Finally, water resources value analysis of every plain subarea in the Taihu basin is made using gray theory evaluation method as water quality, water quantity, population density and gross national product are selected to be the factors. The result produced the differences of water resource value between each subarea, evaluated Water Resource Value in Plain River Network of Taihu Basin and it is also help to the analysis of water resource sustainable utilization in the area.
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