重庆市盘溪河生态需水量初探

Preliminary Study on Ecological Water Demand of Panxi River in Chongqing

生态需水量的确定是指导城市水资源综合规划、海绵城市建设的基础内容之一,对海绵城市建设中城区河流生态需水量的计算方法进行了探讨,以重庆主城区盘溪河为例,建立了盘溪河生态需水量的计算模型,分别计算了盘溪河基本生态需水量、自净需水量及蒸发渗漏需水量,以确定其生态需水量。结果表明:城市按海绵城市理念开发后,盘溪河生态需水量为1.297×107 m 3/a,小于城市按传统模式开发后的河流生态需水量。

The assessment of ecological water demand is one of the key elements for integrating the comprehensive planning of urban water resources and sponge city construction.In this paper,the calculation method of river ecological water demand in sponge cities is discussed and studied.Based on the case study of Panxi River in main city of Chongqing,the calculation model of ecological water demand of Panxi River is established.The basic ecological water demand,self purification water demand,evaporation and leakage water demand of Panxi River are calculated to determine the ecological water demand.The results show that the ecological water demand of Panxi River is 1.297×107 m 3/a,which is smaller than the ecological water demand after the development of the city according to the traditional model.