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LONGTHERM AND EVENT-BASED MODELLING OF SOIL WATER EROSION IN SMALL CATCHMENTS
Abstract
Water erosion is considered to be the most important factor behind the degradation of agricultural land, together with human activities such as tillage erosion. For this purpose, the empirical models (combined with GIS technologies) present valuable way how to localize and calculate the prone areas to erosion processes. This study deals with the assessment of the potential soil water erosion in two small catchments in the north-western part of the Czech Republic. The applied models are MUSLE (Modified Universal Soil Loss Equation) developed by Williams [14] and USPED (Unit Stream Power based Erosion/Deposition model) developed in 1990s [8]. The aim of the study is to assess the contemporary intensity of erosion (and deposition) processes and evaluate the temporal and spatial distribution of these processes. The study is focusing on real (relatively) extreme hydrological situations measured at the Lukavec and the Leskovec gauging stations between 2016 and 2018. The intensity of erosion processes is strongly connected with the natural conditions of the study area and rainfall parameters, together with the land use and cultivated crops.
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