人类活动对水资源的集约高效利用使流域内水文循环产生了二元分化,天然、人工水循环的此消彼长,改变了水资源在人工绿洲、天然绿洲及过渡带之间的时空分布和转化条件.以玛纳斯河流域为例,通过考虑水的天然循环与人工水循环(二元水循环),后者包括水资源开发利用率、耗水率、污水排放浓度影响,探讨了二元水循环下河流生态需水“质”与“量”的综合评价,以区别以往仅从天然水循环(一元)出发评价河流生态需水的缺陷.建立了二元水循环下的河流生态需水的水量与水质计算方法,实现了对玛纳斯河流域河流生态需水水量与水质的综合评价. The intensive and efficient use of water resources by human activities has caused the dual differentiation of the hydrological cycle in the basin. The diversification of natural and artificial water cycles has changed the spatial and temporal distribution and transformation of water resources in artificial oases, natural oases and transitional zones Conditions. Taking the Manas River Basin as an example, by considering the natural circulation of water and the artificial water circulation (binary water circulation), the latter includes the influence of water resources development and utilization rate, water consumption rate and sewage discharge concentration, The comprehensive evaluation of ecological water demand, quality and quantity of the river, so as to distinguish the defect of evaluating the ecological water demand of the river only from the natural water cycle (one dollar), and establish the ecological water requirement of the river under the dual water cycle Water quantity and water quality calculation method to realize the comprehensive evaluation of ecological water demand and water quality of rivers in Manas River Basin.