The study of recent hydrological variability of five selected karstic lakes ofthe Middle Atlas, Morocco, provides important information on the climatic, geological as well as morphological factors influencing the surface variability. In this work, on annual scale from 1984 - 2019, the dataset of Pekel et al.,2016 regarding permanent water areas and on seasonal, monthly scale from 2015 - 2020 with sentinel satellite imagery the lake areas were investigated. The determination of lake areas serves as a proxy for water volume. All lakes show a supra-regional fluctuation trend on both time scales, which is influenced by precipitation on an annual scale, prevailing temperatures on a seasonal scale, and follows a drying trend. In addition, Lake Ifrah, due to its largest catchment area as well as the geometry of the lake basin, is subject to the greatest fluctuations. Furthermore, there is evidence of a large groundwater reservoir under Lake Afourgagh and a small reservoir under Lake Aguelmame Azizga. In summary, among many still unknown influencing variables, the factors of lake size and geometry of the basin, elevation gradients, climatic parameters, shoreline morphology, catchment size and groundwater storage exert a visible influence on lake area fluctuations. The methodology used to determine lake areas on both time scales has been shown to be appropriate by comparison with other publications.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:75846 |
| Date | 03 September 2021 |
| Creators | Flörke-Staats, Maja |
| Contributors | Universität Leipzig |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | German |
| Detected Language | English |
| Type | info:eu-repo/semantics/acceptedVersion, doc-type:bachelorThesis, info:eu-repo/semantics/bachelorThesis, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
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