城市河道生态需水量探讨

The study of ecological water requirement about urban river

随着社会经济的发展,水资源持续不断的开发利用,城市用水和工业用水挤占农业用水,农业用水挤占生态用水的情况时有发生。城市生态用水量不足、城市河道生态环境遭到破坏等问题也越发严重。本文以贾鲁河过郑州市段河道为研究对象,根据该段河道为排污河道的特点,提出了引水稀释污染物的方法用来改善河道的生态环境,并进一步计算了该段城市河道的生态需水量,得出影响城市河道生态需水量的主要因素:排污量、蒸发量以及地表径流量。

With the development of social economy, water resources continue to be taped and utilized. The situation that municipal and industrial water use diverted agricultural water use, and agricultural water use diverted ecological water use occur occasionally, which result in the problems on the shortage of urban ecological water and the destruction of urban riverway ecological environment. This article take Jialu river that in Zhengzhou city section as the research object. According to the characteristics of the riverway for the sewage discharge. The author put forward to the method of diverting water to dilution pollutant to improve the riverway^s eeological environment, and further ealculate the water demand of the riverway. Finally reach the main factors of affecting the water demand of the riverway. That is discharge capacity, evaporation capacity and the surface runoff.