Document Type : پژوهشی
Authors
1 university of Mohaghgh Ardabili
2 University of Mohaghegh Ardabili
Abstract
the purpose of this research is to reveal the changes in land use and the destruction of forest cover and its effects on soil erosion in the watershed of Ghaleroodkhan Fuman.In the next step, using the object-oriented classification method and the nearest neighbor algorithm by eCognition software, land use maps were extracted in 1992 and 2023. In the next step, by identifying the effective factors involved in the erosion of the area and preparing the information layers of each criterion in GIS, the valuation and standardization of the layers were done using the fuzzy membership function and the weighting of the criteria, using the CRITIC method. Eventually; The final analysis was done using the MARCOS method. The forest cover of the studied area has experienced a decrease of about 1700 hectares in its area. Also, residential use with an increase of 27.17 square kilometers has changed the most during the 30-year period of study. In addition, the most important land use change in the basin has been the destruction of forests and their conversion to agricultural lands, pastures and settlements, as well as the conversion of agricultural lands to residential areas, and this method of land use change and conversion, along with other natural factors in the area, Such as; The distribution of loose and erodible formations, high slope, adequate rainfall and the abundance of river have played the greatest role in increasing the soil erosion potential of the Ghaleroodkhan basin.
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