الجريان السطحي في حوض وادي الجباب باستخدام التقنيات الجغرافية

Abstract EN

Hydrology Modeling is a commonly used tool for estimating hydrological basin response to surface runoff due to precipitation.

The SCS-CN model is one of the most important water modeling developed by the US Soil Conservation Service and is designed to simulate runoff of river basin systems.

The SCS-CN method was used to estimate the volume of runoff in the Wadi Al-Jabbab basin using ArcGIS 10.3 and ERDAS 2014.

The value of CN for the Jabbab basin was reached at 16 values.

The weighted CN is of 98 in the category of mountainous rock land - 63% of the land cover area of in the basin and the second highest value of CN is the value of 76 and accounted for 17.57% of the basin area and the rest of the values have been distributed differently.

The total surface runoff rate of the Wadi Al Jibab Basin was 81.37 million m3 and it took 11 hours to reach the basin outlet.

At the sub-basins, the average surface runoff during the 14 years of the sub-basins No.

(1,2,3,4,5) was 9.63, 4.67 , 10.51, 2.07, 56.18 million m3 / s respectively.

The sub-basins 1,2,3 took one hour, basin No.

4 took 6 hours and basin number 5 was similar to the total basin.

The depth of surface runoff for the highest rainfall in 14 years shows that the highest depth of surface runoff is for sub-basin 1, where it reached 73.16 mm, sub-basin No.

5 and the whole basin was 55.94 mm, and basin No.

2, 3, 4 were (59.15، 57.33، 33.63) respectively.

The total drainage peak or peak discharge of the whole basin was 1340.36 m3/s at while according to the sub-basins (1,2,3,4,5) were (1126.17، 390.66، 863.65، 11.56، 925.64) m3/s.