| Issue |
E3S Web Conf.
Volume 708, 2026
7th International Conference on Smart Applications and Water Information Systems: “Intelligent Systems, Geospatial Technologies and Modeling for the Sustainable Management of Water Resources” (SAWIS 2025)
|
|
|---|---|---|
| Article Number | 03003 | |
| Number of page(s) | 10 | |
| Section | GIS, AI Applications, and Risk Assessment | |
| DOI | https://doi.org/10.1051/e3sconf/202670803003 | |
| Published online | 30 April 2026 | |
Subwatersheds prioritization using the compound parameter method: A case study of Drâa basin (morocco)
1 Department of Earth Sciences, Faculty of Sciences Semlalia Marrakech, Cadi Ayyad University, Marrakech 40000, Morocco.
2 Department of Geology, Faculty of Sciences, Ibn Zohr University, Agadir 80000, Morocco
* Corresponding author’s email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Abstract
Water induced risks are major concern in arid and semi-arid regions, like Drâa basin, where unpredictable rainfall and slope increase the threat. In this study, a GIS-based morphometric analysis was conducted to prioritize the three major subwatatersheds—Upper Drâa, Middle Drâa and Lower Drâa— in Drâa basin (south-southeast of Morocco). Digital Elevation Model- derived morphometric parameters were computed first, including basin length (Bl), compactness index (KG), overall slope index (Ig), specific elevation gain (Ds), drainage density (Dd), stream frequency (Fs), gradient ratio (Rg), basin relief (H), time of concentration (Tc) and torrentiality coefficient (Tcoef). After, the sub-watersheds were ranked using the compound parameter method (CPM). The results show that Upper Drâa is most sensitive to water induced risks due to steep slopes, high elevation range and short water concentration time. This study helps identify areas with a priority for water induced risk management, such as flash floods and soil erosion.
Key words: Flash floods / Water erosion / Morphometric analysis / Subwatersheds prioritization / Drâa basin
© The Authors, published by EDP Sciences, 2026
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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