تقدير حجم الجريان المائي السطحي لحوض وادي بنات الحسن _ غرب العراق

Abstract

The basin of Wadi Banat al-Hassan is one of the dry valleys, located in the western plateau in the far west of Iraq, with an area of ​​(77) km2, and in order to obtain more accurate and objective results, the research relied on the American Soil Service and Conservation Corporation (SCS-CN) model to estimate the volume of runoff surface in the basin, which required the use of remote sensing and GIS techniques. Perhaps the most important finding of the research mechanism is that most of the (CN) values are higher than the average and reached a maximum of (91) mm, and the maximum value of the (S) coefficient reached (397.28) mm, and reached the highest value of (La) was (79.46), and the depth of the surface water runoff ranged between (10.36_122.59) mm, while the total annual water runoff volume amounted to (7523997) m3, which indicates the response of the water basin in forming a surface runoff that can be used in developing the research area, and the results of the research proved that the values of (CN) are the highest influencing the amount of water runoff at a rate of (46%), and that the (R) test recorded a very strong relationship between the specific variables and the dependent variable, as its value reached (0.97). As for the value of (R2), it amounted to (0.94), and 6% of it is due to other factors, while the total significance amounted to (231), which is a very high value.