MONITORING OF EVOLUTION IN THE SHORT-TERM OF RIVERS FOLLOWING THE ERASING OF A THRESHOLD (GLANE; LIMOUSIN)

  • J. BOTELLA
    Groupement de Recherche Eau, Sol, Environnement ,Université de Limoges, 16 rue Atlantis, 87000 Limoges, France
  • Y. BRIZARD
    Syndicat d’Aménagement du Bassin de la Vienne, 24 Avenue du Président Wilson, 87700 Aixe-Sur-Vienne, France
  • D. CHAISEMARTIN
    Groupement de Recherche Eau, Sol, Environnement ,Université de Limoges, 16 rue Atlantis, 87000 Limoges, France
  • R. NICOLAU
    Groupement de Recherche Eau, Sol, Environnement ,Université de Limoges, 16 rue Atlantis, 87000 Limoges, France

Abstract

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.

Cuvinte cheie

Morphology sediment transport flow facies substrates