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Asgari S, Shirani K. Zoning and assessing the sensitivity of gully erosion using the maximum entropy model in the Ilam watershed. E.E.R. 2025; 15 (4)
URL: http://magazine.hormozgan.ac.ir/article-1-889-en.html
URL: http://magazine.hormozgan.ac.ir/article-1-889-en.html
Assistant Professor, Soil Conservation and Watershed Management Research Department, Ilam Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran. , shamsasgari@yahoo.com
Abstract: (3 Views)
Gully erosion is an advanced form of soil erosion, and having sufficient information about this type of land degradation can have a great impact on sustainable development. One of the problems of the Ilam watershed is the destruction of its lands due to gully erosion, so it is necessary to assess and zone gully erosion in the Ilam watershed. In this study, the ability of the maximum entropy model was used to zone the sensitivity of gully erosion. Using Google Earth images and field visits, 331 gully points were identified and recorded, and a gully distribution map was prepared. The spatial data of the distribution of gully erosion were divided into two random training (70%) and experimental (30%) groups. 23 factors affecting the occurrence of gully erosion were used in the model analysis. The results of the classification of the gulley erosion susceptibility zoning map using the maximum entropy model (MaxEnt) showed that the percentage of the area of the gulley erosion susceptibility classes of very high, high, medium, low and very low in the Ilam basin are 12.98, 24.05, 31.90, 11.58 and 19.49, respectively. Also, the percentage of gulley erosion occurrence in the very high, high, medium, low and very low sensitivity classes in the Ilam basin are 86.02, 12.16, 1.22, 0.30 and 0.30, respectively. In other words, the very high and high sensitivity classes have accounted for more than 37 percent in the Ilam basin. The response curve of gully erosion sensitivity thresholds and the Jackknife test diagram were prepared, plotted, and analyzed for the most important indicators affecting gully erosion. The results of the analyses showed that topography, channel density, lithology, land use, climate type, vegetation cover, and precipitation factors have the greatest impact on gully erosion.
Received: 2025/04/23
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