Abstract
This investigation has been carried out at Badinska River watershed - one of the most famous torrents in Bulgaria. The purpose of the survey is tos analyse the main erosion factors and erosion potential of territories, with a view to assess soil erosion risk and opportunity of high water formation from watershed. A methodical approach for determination and mapping of the territories in terms of the class of erosion risk with the use of GIS is applied. Assessments are made according to the ?Methodology for preparing the national long term programme for protection against erosion and flooding in forestlands?. The total assessment for Badinska river watershed is ?low to moderate? potential risk and ?very low to low? actual erosion risk. About of 5% of the forest stock territory is with ?moderate? and ?moderate to high? actual risk, and the biggest part of this territory (about 63%) is in the main stream watershed above the Yaloviko tributary.
Highlights
The assessment of soil erosion risk was made for different purposes and at different levels field, watershed, regional, national and continental level
The current study has a specific purpose, connected with soil erosion risk assessment at the watershed level, but only for forestland territories, the data from which to be used for identification of the hazardous territories and erosion control activities, which are necessary to be performed
Rainfall erosivity index (R factor), which is the main parameter for soil erosion risk assessment, is with the mean value of 695.0 MJ mm ha1 h1 yr1, which is around the mean values for Europe (Panagos et al, 2015)
Summary
The assessment of soil erosion risk was made for different purposes and at different levels field, watershed, regional, national and continental level. For all these purposes, a large number of empirical and physical models are developed – USLE/RUSLE, EUROSEM, K2, etc. The current study has a specific purpose, connected with soil erosion risk assessment at the watershed level, but only for forestland territories, the data from which to be used for identification of the hazardous territories and erosion control activities, which are necessary to be performed. Rainfall erosivity index (R factor), which is the main parameter for soil erosion risk assessment, is with the mean value of 695.0 MJ mm ha h1 yr, which is around the mean values for Europe (Panagos et al, 2015).
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