Construction of dams has a significant impact on hydrological conditions of rivers. Eco-hydrology, as a sub-discipline of hydrology, focusses on ecological processes occurring within the hydrological cycle and strives to utilize them for enhancing the environmental sustainability. The aim of this study was to determine the stable and instable eco-hydrologic regions in the study area. First, the factors affecting the eco-hydrologic stability were selected according to field surveys. Afterwards, the layers related to each factor were prepared in geographic information system (GIS) and ArcGIS 10 software. These factors were also weighted using the analytic hierarchy process and pairwise comparisons. Ultimately, the final map was prepared by integrating and determining the homogenous units. The CEQUALW2 software, as a water quality and hydrodynamic model, was used to confirm the accuracy of the quality data and to perform the water quality simulation in the studied dam. According to the results, pollutant source and water quality were found to be the most important factors. The final map indicated that most of the areas had not a suitable condition in terms of stability at the downstream reaches.

大坝的建设对河流的水文状况有重要影响。生态水文学作为水文学的一个分支学科，关注发生在水文循环中的生态过程，并努力利用它们来提高环境的可持续性。本研究的目的是确定研究区的稳定和不稳定的生态水文区域。首先，根据实地调查选择了影响生态水文稳定性的因素。随后，在地理信息系统（GIS）和ArcGIS 10软件中准备好与各因素相关的图层。这些因素也使用层次分析法和成对比较进行加权。最终，最终的地图是通过整合和确定同质单位来准备的。CEQUALW2 软件，作为水质和水动力模型，用于确认质量数据的准确性并在所研究的大坝中进行水质模拟。结果表明，污染源和水质是最重要的影响因素。最终的地图表明，就下游河段的稳定性而言，大部分地区都没有合适的条件。