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Fla h flood strike different parts of Al-Ain area virtually every year causing Serious property loses this study investigates the main factors control ling this Flooding, namely. (a) Climate, (b) geomorphology, and (c) hydrogeology Climatically, mo t of rainstorms do occur during the month of February. Geomorphologic ally, the landforms and drainage systems are the main factors. Hydrogeological, twenty basins were carefully identified and their morphometric Parameters were measured the relations between these morphometric parameters and flash floods were accordingly assessed. The results show that most severe damage did occur in buildings and farms in Al Ain Area the most influential sources of floodwaters are Zarub gap and Wadi Al-Ain. The eastern foot slope of the eastern hogback of Jabal Hafit is the highest risk zone of the Investigated area The channelized course of Wadi Al-Ain is satisfactory for the t i me being as its Capacity exceeds that of the highest floods of the last few years, but the course originating at Zarub should be appropriately managed. The study shows also, that the distribution of the t race heavy metals Cu, Zn, and Pb in the area is directly related to the drainage system, and should be carefully monitored to avoid possible health hazards