Hydrological Design of Ashour Watershed by Geographic Information System (GIS)

In this research, geographic information systems (GIS) were used to analyze the basic features of the catchments in the study area and to calculate the necessary data requirement to design hydraulic structure such as reservoir capacity, culvert or bridge. Ashour-basin in Nineveh province in north region of Iraq is selected as case study. Hydrological, soil, and climatic data were collected for the study area. Hydrological calculations to estimate the runoff and maximum flood discharge of valleys for different flood return periods are designed. The use of (GIS) has emerged as a significant support tool for managing , analyzing and assembling water resources information. With the Natural Resources Conservation Service (NRCS) method has provided more information and facilitated to suggest the portable, site, size, and type of hydraulic structure to use in the region.