山区城市河流生态环境需水量计算模式及其应用

Calculation mode for ecological water demand of mountain-city-rivers and its application

分析山区城市河道的生态环境特征,探讨山区城市河道生态环境需水规律,认为城市河道生态环境需水量主要与水生生物栖息场所需水量、污染物稀释净化需水量、景观功能要求的适宜水深和适宜水面面积等因素有关,据此建立了山区城市河道生态环境需水量和生态需水水深的计算模式,并用该模式对浙江省丽水市城市生态环境需水量和生态需水水深进行了计算,其结果为丽水市城市水生态系统建设提供了科学依据和技术支持.

Based on a review of the research on ecological water demand at home and abroad, the characteristics of ecological environment of mountain-city-rivers were systematically analyzed, and the regularities of ecological water demand of the rivers were discussed. It is concluded that the ecological water demand is mainly related to the factors, including the water demand by the survival of aquatic plants and animals, the water demand by pollutant dilution and purification, and the suitable water level and water surface area for water landscape construction. A calculation mode for ecological water demand and water depth of mountain-city-rivers was derived and applied to calculation for Lishui City of Zhejiang Province. The calculated results may provide scientific basis for and technical support to the construction of water ecological system in Lishui City.