| Titre | L'incision d'affluents méditerranéens du Rhône : la Drôme et l'Ardèche / The incision of two sub-mediterranean tributaries of the Rhône : the Drôme and the Ardèche | |
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| Auteur | Hervé Piegay, Norbert Landon | |
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Revue |
Géocarrefour Titre à cette date : Revue de géographie de Lyon |
| Numéro | volume 69, no 1, 1994 Enfoncement des lits fluviaux : processus naturels et impacts des activités humaines | |
| Page | 63-72 | |
| Résumé anglais |
Over the period since the 1920s,the average values of entrenchment of the river beds of the Ardèche (middle reach) and the Drôme (lower and middle reaches) are respectively 0.43 and 1.68 metres. The main cause has been gravel extraction from the river bed during the 1970's. It seems that man-made incision has been increased by engineering works (dams, river embankments), the agricultural crisis of the 1950's and the natural peak flow reduction since the 1800's. Consequently, various reasons explain river bed degradation. Today, reversibility is the main problem of management. The damage to different uses (agriculture, water supply) and the deterioration of ecological diversity are well known. On the Drôme River, the planners have decided to halt incision because of the falling water table. Unfortunately, on the Ardèche River, continuing dredging to limit flooding and preserve tourist activities in the floodplain is likely to favour increased incision. Source : Éditeur (via Persée) |
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| Article en ligne | http://www.persee.fr/web/revues/home/prescript/article/geoca_0035-113x_1994_num_69_1_4239 |
