LARHYSS Journal
Volume 18, Numéro 2, Pages 57-82
2021-07-07
The Waters Of The Cesse Watershed (south-east France): Cartographic And Geo-environmental Approaches
Authors : Lahmar Karim . Saied Sawssen . Majdoub Rajouane . Larue Jean- Pierre . Ballais Jean- Louis .
Abstract
The degradation of water quality and the competitive exploitation of this resource are accelerating, especially in the Mediterranean region. Climate change accentuates the phenomenon of water scarcity which is itself catalyzed by a marked degradation of resources. In order to produce an image of the runoff water quality of the Cesse watershed, located in the South-East of France, a method is proposed that combines a geo-environmental and cartographic study. Results and the mapping of the physico-chemical analyzes of the waters of the Cesse showed that the transfer of chemical facies occurs from upstream to downstream. High concentrations are often found at the outlets of rivers and tributaries. Interpretation of obtained results revealed the origin of the strong mineralization. The geology and hydrology of the study area explain the spatial variations. The experiment errors are negligible. The mapping by interpolation fills some gaps in the values obtained. The technique adopted reflects a better representation of certain processes, in particular Upstream / Downstream communication in the same watershed. That is, the concentrations of chemical elements in the samples change in relation to the morphology and hydrology of the watershed. This could improve the existing database in particular for the hydrological conditions of the small watersheds of the Mediterranean.
Keywords
The Cesse Watershed; cartography; chemical facies; evolution.
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