Determination of the Best Area for Collection of Flashflood Water using Geographic Information Systems and Digital Elevation Model

Modern techniques of remote sensing (RS) provide tremendous potentiality for monitoring dynamic changes in large surface water bodies, extracting hydrological parameters, and modeling water balance. Normalized Difference Water Index (NDWI) using Near Infrared (NIR) and green channels of Lands at can delineate and enhance open water features. Geographical techniques such as Geographical Information Systems (GIS) and remote sensing help in locating suitable water recharging and / or harvesting sites in recent last years. This water can be useful for constructing a dam or basin in the study area. In addition, they can be an effective way of providing water for agriculture and pasture areas, which are furthest from the Nile. The objective of this paper is to determine hydrological network and select the best area of flash flood water accumulation. This study had been carried out in the locality of Omdurman (Sudan). It had indicated the usefulness of the combination of   RS and GIS techniques in the determination the best possible site for floodwater accumulation.