NDLI: Aménagement hydroélectrique et continuité de la charge de fond : contribution à une mise en perspective historique dans des bassins alpins affluents du Rhône

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Aménagement hydroélectrique et continuité de la charge de fond : contribution à une mise en perspective historique dans des bassins alpins affluents du Rhône

Content Provider	Semantic Scholar
Author	Bravard, Jean-Paul
Copyright Year	2016
Abstract	La question de la continuite sedimentaire a pris une actualite recente a l’echelle europeenne en complement de la continuite ecologique. C’est en fait une question ancienne qui a culmine au XIXe siecle, epoque de surcharge sedimentaire des lits fluviaux du fait de l’erosion intense des versants defriches sous un climat agressif. Cet article montre comment, dans le bassin du Rhone : 1) les premiers ouvrages hydroelectriques ont ete adaptes a cette surcharge en permettant le passage des crues et de la charge solide grossiere ; 2) de grands barrages-reservoirs ont ete construits a partir des annees 1930 pour optimiser le potentiel energetique mais au risque d’un fort piegeage des sediments; 3) les extractions ont permis de partiellement controler les entrees sedimentaires et de menager leur capacite ; 4) Les barrages a derivation du Rhone (1899-1986) ont ete realises dans un contexte de tres forte reduction des entrees dans le fleuve, leurs contraintes propres fragmentant profondement la continuite sedimentaire.
File Format	PDF HTM / HTML
DOI	10.25518/0770-7576.4439
Alternate Webpage(s)	https://popups.uliege.be/0770-7576/index.php?file=1&id=4439
Alternate Webpage(s)	http://popups.ulg.ac.be/bao/mkh2p/index.php?upd=1481711224&url=http://popups.ulg.ac.be/0770-7576/index.php?id%3D4439%26format%3Dpdf
Alternate Webpage(s)	https://doi.org/10.25518/0770-7576.4439
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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