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In the present work the researches were carried out in the Tata Valley watershed, which has an area of 17 km² and administratively belongs to Dambovita county, Romania. The purpose of the study was to estimate the soil losses for a single storm event in the Tata Valley watershed using the MUSLE method and G.I.S. The identification of the erosion processes and the estimation of the quantity of eroded material is extremely important both for the elaboration of the risk maps, as well as for the analysis of the surfaces degraded by rill and gully erosion. The hydro-meteorological data for the 15 events studied (occuring from 3th June to 01st August 2018) were obtained from the rainfall station located in the area. The runoff factor of MUSLE was determined using SCS-Curve Number method and the peak flow using the rational method. Crop management factor (C), (K) factor and Topographic factor (LS) were determined using geographic information system (GIS) and field-based survey of land use and land cover (Corine Land Cover 2018) similar to USLE model. In the present scientific work the conservation practice (P factor) is obtained from the literature and it is considered as 1. Sediment yield has been simulated for fifteen storm events spread over the study period (3th July-01st August 2018) and the model results were validated using the values obtained by direct measurements. The results obtained for the study area, indicate that the MUSLE model can be used for highlighting both rill and gully erosion phenomena, produced in a small watershed like Tata Valley. The average sediment yield for the studied storms in Tita Valley watershed between June 3 and August 1 2018 is 3.70 tons. [ABSTRACT FROM AUTHOR]

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 northwestern 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. [ABSTRACT FROM AUTHOR]