Water Resource Decrease Due to Land-Use Changes in the French Jura Mountains: A Combined Use of the SWAT Model and Land Cover Modeling to Evaluate the Global Trend

Rachid Nedjaï 1 Abdelhamid Azaroual 1 Laurent Touchart 1 Nasredine Messaoud-Nacer 2
1 CEDETE - Centre d'Etudes pour le Développement des Territoires et l'Environnement
2 USDB - Université de Saâd Dahlab [Blida]
Abstract : The main goal is to evaluate the impact of land-use changes on water resources and to predict their evolution during the next 30 years. The investigation of four landsat images (1975, 1992, 2000 and 2006) allows close detection of the landscape and shows substitution of grassland by trees, especially in higher areas. We use the LCM model with Idrisi software to predict land-use evolution and then the SWAT (hydrological model) to calculate the water flows under these new land-use conditions. The climatic conditions are kept unchanged for the predictive phase. The results show a clear decrease of the flows during the simulation period (1975-2010) which is around 15%. In fact, this observation can be related to the encroachment on landscape of landscape caused by the rural exodus recorded in France since 1970. The reduction in volume could be caused by evapo-transpiration and/or rises in infiltration generating underground circulation.
Keywords : GIS Response Unit Land-use Flow DEM Remote Sensing Watershed
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Journal articles
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https://hal-univ-orleans.archives-ouvertes.fr/hal-02082694
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Submitted on : Thursday, March 28, 2019 - 1:02:51 PM
Last modification on : Friday, June 21, 2019 - 3:48:03 PM

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Rachid Nedjaï, Abdelhamid Azaroual, Laurent Touchart, Nasredine Messaoud-Nacer. Water Resource Decrease Due to Land-Use Changes in the French Jura Mountains: A Combined Use of the SWAT Model and Land Cover Modeling to Evaluate the Global Trend. American Journal of Environmental Engineering, 2013, 3 (5), pp.225-235. ⟨10.5923/j.ajee.20130305.04⟩. ⟨hal-02082694⟩

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