Surface water estimation in Sewell watershed

This study was conducted in the field of hydrology, through which the researcher analysed the hydrological characteristics of the waters of the Sewell Basin, depending on the file of the digital elevation model (DEM12.5m) for the study area, and the use of the hydrological GIS program to find the morphometric characteristics affecting the hydrology of the region. The researcher also resorted to a method Conservation of American soils and curve number In order to obtain the volume of running water during the year and in this way, it lies between two latitudes(35o 34- 29= - 35o 55- 23=)N and two longitudes (45o 26- 01= - 46o 20- 49=)to the east, the water channels of the Sewell Basin are six (6) ranks in an area of ​​about (1545 km2), its length is (82.6 km) and its width is (18.70 km), and the highest point in the basin is (2770 m) in the north of the region. The lowest point in the study area is located at an altitude of (816 m) above sea level. The objective of this study is to analyses the hydrological characteristics of the main Sewell Basin and the secondary basins in order to estimate the water flow in it. There are 11 secondary water basins in the study area. The hydrological characteristics of these basins have a direct impact on the amount of water accumulation. The study concluded that the basins have large areas of water resources, and the expected annual water volume in the main Sewell Basin (1.113 billion / m3), and the average annual irrigation during the period (2012-2015) was (6.69 m 3 / sec).