Abstract
Rainwater harvesting is a critical issue and process to address water shortages at the global and regional levels. The effects of drought on Iraq in recent years have been exacerbated by climate change. Water resource management has become vital to solving this challenge. The study aimed to use GIS technology to study the best dam construction sites in the study area, and the basin is located in Samarra, Salah al-Din Governorate. The area of the basin is (5379.8) square kilometers at an altitude ranging between (23 - 144) meters above sea level, and the study used the natural criteria as a better suggestion is to use the integrated GIS programs in (3. ArcGIS10) and (AHP). The study showed that there are 7 sites for constructing dams with varying storage capacities. One of the dams in the felt basin was chosen to have the largest water storage capacity. The water capacity of the reservoir was 7.3 m 3 with an area of 144.2 km 2.
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