HYDROLOGICAL ANALYSIS OF THE WATERSHED OF AN
NAJAF PROVINCE BY GIS
الباحث الأول:
Ali H. Al Rammahi 1
الباحثين الآخرين:
, Emad A. Al Helaly 2, AbudAlla H. Al Khafagi3 and Mohammed Q.
Al Bedieri 3
المجلة:
Kufa Journal of Engineering
تاريخ النشر:
None
مختصر البحث:
The analysis of the watershed gives the surface area of land that rain streamed arrived in the
river. The modern method to analyze the catchment is the ArcGIS program based on the Digital
Elevation Model (DEM). The study area is An Najaf province,…
The analysis of the watershed gives the surface area of land that rain streamed arrived in the
river. The modern method to analyze the catchment is the ArcGIS program based on the Digital
Elevation Model (DEM). The study area is An Najaf province, which area equaled about 27675
square kilometers. The HECGeoHMS (Hydrologic Engineering Center's Hydrologic Modeling
System) is the link program on the ArcMap software that abled by serious steps to analyze the
specific watershed. The auto analysis of the watershed area gives four basins for each outlet
points located on the distributary Euphrates river. These four basins consisted of multi subbasins and streams of rain flow. Basin 4 has the most significant volume, about 11.4% of the
total case area of the basin, and the average slope is 3.2%. According to the amount of
accumulative rainwater, basin 4 is essential when any obstruction is constructed at the end of
the outlet point in the stream. This location of the construct is used to prevent the sediment in
the Euphrates river and to avoid surface soil degradation. The arrangement of importance basin
based on the advantage of water using to give maximum discharge and low evaporation is basin
four at the first, basin two at the second.
