Flash floods impact on the construction of rainwater harvesting structures

Introduction. The lack of fresh water has become a serious problem. main causes the crisis are population growth and climate change. Egypt is very arid country which facing scarcity due to increasing demand limited supply. Applying new approaches required in this situation deal with scarcity. Wadi Watir Sinai Peninsula, chosen as research area, an important tourist commercial watershed. It experiences threat flash floods. residents losing their crops sheep. Roads deserted, lives danger periodic occurrence Materials methods. For first time, current investigates impact floods on implementation rainwater harvesting (RWH) systems. flood risk RWH structure maps were overlaid using GIS. Results. results showed that five percolation tanks, check dams, 11.15 km2 area for on-ground 0.48 space farm ponds optimal during Conclusions. development was prioritized divided into three phases. Therefore, clearly affects plans. should be considered calculation design capacity structures.