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:Title

Locating Suitable Areas for Rain Water Harvesting

:Writers

Nasrollah Aslinejad, Abuzar Nasiri, Mansur Karkon varnosfaderani, Hamid Alipur and Rasoul Kharazmi

:ABSTRACT

More than 75 percent of Iran is located in arid and semi-arid and faces many hydrological constraints that often are attributed to the lack of rainfall and rainfall distribution. This issue is locating suitable areas for rain water harvesting in Birjand plain however it is more importance in poor farming communities that are dependent on rain-fed cultivation. To determine the areas those are prone to runoff collection used from a Decision Support System (DSS) and Geographic Information System (GIS) to identify a logical process in relation to harvesting the rainfall and within this system utilization from Model Builder in Arc GIS 9.3 software. The process defined in this paper uses from runoff capacity for decision and some information such as runoff potential map, distances from residential areas map, irrigated cultivation map and rain-fed cultivation map is inputting in the system. With combination of these maps makes the rain water harvesting prone areas map. The result shows that more than 40 present is in medium class and 32 present is in good class

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