Determination of the Appropriate Sites to Rain Water Harvesting using Analysis Hierarchical Process (AHP)

Surface water that is the result of rainfall-runoff responses in a basin is a potential water source that if it is managed properly, can be useful to demand secure. Rain Water Harvestings an suitable option for monopoly and store runoff for future use, especially during the period that has restricted access to water. In this study has determined susceptible places for Rain Water Harvesting using AHP method in Birjand plain at southern Khorasan Province. For research using opinions of various experts, effective criteria's in rain water harvesting process are determined and are pair wise compared together then paired comparison matrix of criteria was established and weight of each of them was estimated. After determining the weights, spatial layers of criteria combined together and was created the final layer of rain water harvesting prone areas. the results showed that with placing Talent plain in four-class weak, moderate, good and very good respectively, 0.82, 46.1, 50.4 and 2.66 percent of the total basin is allocated to the classes listed and generally from west to East of plain, is added on its ability to rain water harvesting.