MONITORING OF EVOLUTION IN THE SHORT-TERM OF RIVERS FOLLOWING THE ERASING OF A THRESHOLD (GLANE; LIMOUSIN)
J. BOTELLA 1, Y. BRIZARD 2, D. CHAISEMARTIN 1, R. NICOLAU 1 1. Groupement de Recherche Eau, Sol, Environnement ,Université de Limoges,
16 rue Atlantis, 87000 Limoges, France
2. Syndicat d’Aménagement du Bassin de la Vienne, 24 Avenue du Président Wilson,
87700 Aixe-Sur-Vienne, France
In this work was monitoring the morphological evolution of a river (Glane) following development thresholds. Erasing the obstacle caused a strong release of fine sediment towards downstream. A change of particle size distribution is well observed in the area with increased downstream fine and coarse appearance of the upstream substrate. In the short term, an improved hydro-morphological characteristic was observed upstream to the arranged threshold. Future measurements campaigns will verify the sustainability of these changes.
