Assessing land use impacts on flood processes in complex terrain by using GIS and modeling approach |
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Authors: | Y. B. Liu F. De Smedt L. Hoffmann L. Pfister |
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Affiliation: | (1) Department of Hydrology and Hydraulic Engineering, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium;(2) Research Unit in Environment and Biotechnologies, Centre de Recherche Public - Gabriel Lippmann, 162 Avenue de la Faïencerie, L-1511 Luxembourg, Grand-Duchy of Luxembourg |
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Abstract: | A distributed hydrologic modeling and GIS approach is applied for the assessment of land use impact in the Steinsel sub-basin, Alzette, Grand-Duchy of Luxembourg. The assessment focuses on the runoff contributions from different land use classes and the potential impact of land use changes on runoff generation. The results show that the direct runoff from urban areas is dominant for a flood event compared with runoff from other land use areas in this catchment, and tends to increase for small floods and for the dry season floods, whereas the interflow from forested, pasture and agricultural field areas contributes to the recession flow. Significant variations in flood volume, peak discharge, time to the peak, etc., are found from the model simulation based on the three hypothetical land use change scenarios. |
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Keywords: | hydrologic modeling flood prediction land use impact GIS Alzette |
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