Mots-clés
Action anthropique Connectivité Cours d'eau Déboisement Etats-Unis Géométrie hydraulique Plaine d'inondation Siècles 17-19 Sédimentation Végétation ripicole Channel geometry Connectivity Deforestation Floodplain Human impact Riparian vegetation Sedimentation Stream United States of America Acción antrópica Corriente de agua Desmonte Estados Unidos Geometria hidráulica Llanura de inundación Sedimentación Vegetación ribereñaA legacy of absence : Wood removal in US rivers
Auteur(s) et Affiliation(s)
WOHL, E.
Colorado State Univ., Fort Collins, Etats-Unis
Description :
The focus in this paper is on rivers within the continental United States, including Alaska. Removal of natural wood rafts began in the 17th century in the eastern United States and proceeded westward with the movement of European settlers, accelerating during the 19th-century era of steamboats and floating of cut timber. Removal of the natural wood rafts likely forced many rivers from a multi-thread planform with high channel-floodplain connectivity into an alternative stable state of single-thread channels with substantially reduced overbank flow, sedimentation, and avulsions. The A. proposes that widespread removal of instream wood for steamboat routes, timber rafts, and flood control was equally significant in decreasing floodplain sedimentation and river complexity, and in causing a fundamental, extensive, and intensive change in forested river corridors throughout the United States.
Type de document :
Article de périodique
Source :
Progress in physical geography, issn : 0309-1333, 2014, vol. 38, n°. 5, p. 637-663, nombre de pages : 27, Références bibliographiques : 4 p.
Date :
2014
Editeur :
Pays édition : Royaume-Uni, London, Sage Publications
Langue :
Anglais
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)