![]() This study explains how a detailed structural mapping shows hydrology constraints. A hydrological model is discussed where the water flow is confined onto Liassic carbonates and driven by NW-SE fractures. A comparison between the regional water flow trend, drainage pattern and structural map shows that the NW-SE fractures control the water flow from the Tabular Middle Atlas to the Saïss plain. On the other hand, the NW-SE set was poorly described until now: it is both diffuse and widespread on the Tabular Middle Atlas. The first set is well known and corresponds to a main trend that controlled the tectonic and stratigraphic evolution of the study area. ![]() This structural map reveals two fracture sets trending NE-SW and NW-SE. ![]() This study provides new data to determine the water pathways based on a structural map produced from a novel analysis of SPOT images and a digital elevation model. The aquifers are fed by water coming from the Tabular Middle Atlas, for which the pathways are poorly constrained. This plain is located in the Meknes-Fes basin and between two deformed domains: the Rif and Middle Atlas. Therefore, the improved knowledge about the water supply is imperative within a context of recurrent droughts and overexploitation of the groundwater. The plain of Saïss is a fertile area of great agricultural production with major economic interests. Structural pattern of the Saïss basin and Tabular Middle Atlas in northern Morocco: Hydrological implications
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