E3S Web Conf.
Volume 314, 2021The 6th edition of the International Conference on GIS and Applied Computing for Water Resources (WMAD21)
|Number of page(s)||4|
|Section||Geomatics, Remote Sensing and Modelling|
|Published online||26 October 2021|
Influence of DEM resolution on the RUSLE model: Case of abandoned quarries in Settat province (Morocco)
Hassan First University of Settat, Faculty of Sciences and Techniques, BNRNE Laboratory, Settat, Morocco
2 Hassan First University of Settat, BO 473, 26000, Settat, Morocco
3 Hassan First University of Settat, Faculty of Sciences and Techniques, CAE Laboratory, Settat, Morocco
* Corresponding author: email@example.com
Topographic slope information is one of the critical variables, which governs soil erosion. This topographic slope can be derived from the Digital Elevation Model (DEM). Significant discrepancies are found in the estimation of soil erosion using different DEMs of different resolutions. In the present study, the Revised Universal Soil Loss Equation (RUSLE) was used for soils in the Settat province (Morocco) to assess the risk of water erosion caused by abandoned quarries. The soil erosion rate was divided into five classes to illustrate the erosion rate variability using two DEMs (30m and 90m). The impact of topography on erosion was determined by calculating the value of the LS factors. In this case, the values obtained vary between 0 - 120.623 for ASTER DEM (30m) and 0 - 10.225 for DEM SRTM (90m). The results also show that most quarries have a soil loss rate that varies between 0 t/ha/year and 8.1 t/ha/year for ASTER DEM (30 m). However, for DEM SRTM (90 m), the soil loss rate is zero. This suggests that RUSLE model users should use high-resolution input data for a close representation of reality and capture the maximum results with reasonable accuracy.
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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