Elevation the risks of water erosion in the valley Badiyya Basin in the Jazira Desert - northwest Iraq

Abstract

Abstract

The research aims to determine the risks of surface water erosion and the distribution of its degrees in the basin, based on the Gavrilović model, which depends on several indicators (vegetation cover index, soil protection index, soil erosion susceptibility index, slope index, drainage network development index, and temperature and rainfall index) and through Integrating these indicators into geographic information systems programs enabled the researcher to analyze the results obtained by applying the equation (W) to calculate the annual rate of erosion (m3/km2/year). It was found that the entire basin is exposed to the risks of water erosion, and this risk was recorded at four levels, as erosion was recorded Generalized has the largest area of (244) km2, with a percentage of (28.7%) in the basin, and the amount of lost soil ranges between 50 - 5000 m3/km2/year, the highest correlation value was recorded between the amount of soil lost and the soil erosion susceptibility index (Y), as the correlation value reached (-0.973), which is a very strong inverse relationship. Thus, the amount of lost soil increases with the decrease in the value of the soil erosion susceptibility index.