Mots-clés
Ain ; Années 1950 ; Années 1990 ; Années 2000 ; Bois ; Bois flottant ; Cours d'eau ; Ecosystème ; Erosion des berges ; France ; Géométrie hydraulique ; Jura ; Méandre ; Végétation ripicoleAin ; Bank erosion ; Channel geometry ; Ecosystem ; France ; Jura ; Meander ; Riparian vegetation ; Stream ; The 1950's ; The 1990's ; The 2000's ; Wood ; Woody debrisDecadal changes in distribution and frequency of wood in a free meandering river, the Ain River, France
Auteur(s) et Affiliation(s)
LASSETTRE, N.S.
CNRS-UMR 5600 EVS, Univ., Lyon, France
PIÉGAY, H.
CNRS-UMR 5600 EVS, Univ., Lyon, France
DUFOUR, S.
CEREGE, CNRS UMR 6635, Univ. Aix-Marseille, Aix en Provence, France
Description :
This study examined the temporal dynamics and longitudinal distribution of wood over a multi-decadal timescale at the river reach scale (36 km) and a meander bend scale (300-600 m) in the Ain River, a large gravel-bed river flowing through a forested corridor, and adjusting to regulation and floodplain land-use change. At the reach scale they estimate wood production to the river from the riparian forest by bank erosion over a six-decade time period, and describe the distribution (longitudinal and cross-sectional) and abundance of wood over a ten-year period. At the sub-reach scale, they describe the change in wood distribution and mass over a ten-year period. The increase in wood since 1950 is a response to floodplain afforestation, to a change from braided to meandering channel pattern in response to regulation, and to recent large floods. The results, and the link between sinuosity and wood frequency, establish geomorphology as a dominant wood storage and recruitment control in large gravel-bed rivers.
Type de document :
Article de périodique
Source :
Earth surface processes and landforms, issn : 0197-9337, 2008, vol. 33, n°. 7, p. 1098-1112, nombre de pages : 15, Références bibliographiques : 38 ref.
Date :
2008
Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley
Langue :
Anglais
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)