东辽河流域河流系统生态需水研究

河流系统的生态需水是指维持河流正常的生态结构和功能所需要的一定水质最小水量 ,具有明显的时空变化特征。河流系统的生态用水包括河道系统 (包括排沙生态用水和水面蒸发生态用水 )和洪泛地系统两大系统的生态用水。东辽河流域河道系统生态需水量占年均径流量的 44 .43%。洪泛地生态用水量为 16 .87亿 m3,占全流域年均降水量的 2 8.0 2 %。必需采取有效措施进行河流水资源开发的有效调控。

Ecological Water Demand by River System in East Liaohe River Bas in

The ecological water demand by the river system is the least water which maintains the natural ecological structure and the function of the river, having the characteristics of spatially and the timely evolution. It includes the water demand by the watercourse system (including the water transferring sand and the evaporation from water surface) and by the floodplain land. The ecological water demand by the water course system is 44.43 % of average yearly runoff and the ecological water demand by the floodplain land is 1.687 billion being 28.02 % of the total precipitation. The effective countermeasures must be planed to control the exploitation of the water in east Liaohe river basin.