Research about flood and run-off in arid environmental. Floods in semi-arid, arid and hyper-arid areas have their own characteristics that include their unpredictability, the fact that the wadies are dry most of the year and that this combination can lead to severe damages including in life. The need to understand floods is greater than ever. We welcome any presentation on flood related research including hydrology, geology, ecology, meteorology, agriculture, geography and related disciplines.