Ali Jozaghi; Abolfazl Shamsai
Abstract
Abstract
According to recent studies, in 2025, water shortages will increase in poor countries with limited resources and rapid growing populations; hence, a long term planning is necessary for saving water resources. One of the most important plans is building a dam onperennial rivers and the main ...
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Abstract
According to recent studies, in 2025, water shortages will increase in poor countries with limited resources and rapid growing populations; hence, a long term planning is necessary for saving water resources. One of the most important plans is building a dam onperennial rivers and the main step in this process is selecting the best place in watershed. The aim of this study is to develop the multi-criteria decision support framework for dam site selection in South of Sistanand Balouchestan province. A study has been made by applying GIS and Technique for Order Preference by Similarity to Ideal Solution, to select and prioritize potential places for constructing a dam. The criteria for dam site selection have been chosen upon scholars’ ideas and available data. They include Geology, Land use, Sediment, Water Quality, Erosion, Groundwater and Hydrology. Ratio Estimation Procedure has been used to estimate weight of criteria. First, TOPSIS method and GIS have been conflated and a geospatial layer has been createdthat is called “the relative closeness to the ideal solution” whose values are between zero and one. Second, A Model has been created based on streams and topographical conditions. This model evaluates structural height, crest length of dam, and volume of reservoirs. Then, upon the results of the model, 15 places have been selected. Finally, the sites have been prioritized by finding their values on the created layer. In conclusion, the best place is A - Kahir dam- whose value is 0.85, and the worst site is P,whose value is 0.47 as well as Pishin dam which is the worst dam amongst all the dams which have been built in the region with the value of 0.62. Also, the best option is K, that is located on the right side branch of Sarbaz Riverand its value is 0.67.
