Study On Eco-environmental Water Requirement And Eco-environmental Early Warning Of River System In TaiZhou

With the rapid development of population and economy, water resource has been excessively exploited and the balance of ecosystem has been seriously changed and destroyed. The problem of water resource pollution and shortage is becoming more and more serious. The contradiction between exploitation water resource and environment is becoming more and more acute. The river system is one of the most important ecological system. The function of river system usually includes ecological function, environmental function and resources function etc. However, because of the mankind's unreasonable activity that they exploit the river water and occupy the ecosystem space of water resource excessively, the structure and functions of the river system are destroyed and create tremendous influence to the people and the eco-environment. Therefore, we should protect and improve the river eco-environment and resolve the eco-environmental water requirement of river system, which become the prerequisite for the sustainable development of social economy of our country. With the support of Jiangsu Water Conservancy Technology Key Item(2004216), eco-environmental water requirement and eco-environmental early warning of river system in southern plain are discussed. Main contents are as following.(1) On the basis of analyzing the research headway of the eco-environmental water demand of river in recent years, the conception and its systemic composition of the eco-environmental water demand of river were discussed in the paper.(2)In this paper, methods on eco-environmental water requirement of river were summarized and analyzed. The method of water environment capacity for the calculation of the eco-environmental water requirement in river netlike of southern plain was selected.(3)The definition and function of eco-environmental early warning of river system were described. The early-warning system of river eco-environment was designed totally from three aspects of conceiving the index system, choosing the early-warning model and expressing the early-warning signal.(4)In this paper, the eco-environmental water requirement of river system in Taizhou was calculated and the eco-environmental water demand of different planning...