Journal
APPLIED WATER SCIENCE
Volume 11, Issue 7, Pages -Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s13201-021-01427-z
Keywords
CEQUALW2 Software; Eco-Hydrology (EH); Dam; Geographic Information System (GIS); Power Plant; Spatial Multi-Criteria Evaluation (SMCE)
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This study focused on determining stable and instable eco-hydrologic regions in the study area by selecting factors affecting eco-hydrologic stability, preparing layers in GIS, weighting factors using analytic hierarchy process and pairwise comparisons, and integrating homogenous units to create a final map. The CEQUALW2 software was used to confirm data accuracy and perform water quality simulation in the studied dam, with pollutant source and water quality identified as the most important factors. The final map indicated unsuitable stability conditions in most areas at downstream reaches.
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.
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