Abstract:

Erosion is one of the most important environmental risks that our country is exposed to today. Topographic diversity, soil diversity, changes in precipitation regime in our geography cause various erosion risk levels to occur. In this study, the erosion risk in the Bendimahi sub-basin located in the Van Lake Basin, which is one of the few closed basins in our country, was determined by using two different risk assessment methods and it was aimed to compare the methods with each other. In this context, the Institute for the Conservation of the Nature (ICONA) and The Coordination of Information on the Environment (CORINE) risk assessment systems, which are among the most used techniques in erosion risk classification, were used. In this framework, according to the technique used, data that directly affect erosion such as soil structure, precipitation, vegetation cover, slope, drought and lithological structure were used. The results were confirmed with 18 highly eroded areas from field studies. According to this; The accuracy rates of ICONA and CORINE risk classification techniques were found to be 50%. However, when cross-validated, this rate was 33%. Therefore, although the accuracy of both methods is the same, it has been determined that their compatibility with each other is limited. In addition, it has been determined that the ICONA model is a more efficient method for small basins because it can produce results with the same accuracy with less input data.

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