Mots-clés
Barrage ; Bassin-versant ; Etats-Unis ; Etude comparée ; Habitat ; Humidité du sol ; Matière organique ; Oregon ; Propriétés du sol ; Pédogenèse ; Restauration écologique ; VégétationComparative study ; Dam ; Ecological restoration ; Habitat ; Oregon ; Organic materials ; Pedogenesis ; Soil moisture ; Soil properties ; United States of America ; Vegetation ; WatershedCuenca hidrográfica ; Estados Unidos ; Estudio comparativo ; Humedad del suelo ; Hábitat ; Materia orgánica ; Pedogénesis ; Propiedades del suelo ; Represa ; VegetaciónSoil ripening following dam removal
Auteur(s) et Affiliation(s)
KASSAB, C.
Dept. of Earth, Atmospheric, and Planetary Science, Purdue Univ., Lafayette, Etats-Unis
HARBOR, J.
Dept. of Earth, Atmospheric, and Planetary Science, Purdue Univ., Lafayette, Etats-Unis
Description :
The Marmot Dam, located on the Sandy River, Oregon, was one of the largest US dams to be removed. In this paper, the AA. report on the soil development of dewatered reservoir sediments, determined using a ripening index and assessing relative changes in sediment properties with depth in comparison to properties of downstream soils that were not inundated by the dam. The results indicate that chemical and biological ripening happen more slowly than physical ripening. As such, dewatered reservoir sediments likely reach field capacity before other crucial edaphic conditions have developed, such as the accumulation of plant-available iron and nitrate. This difference will greatly affect vegetation successional pathways in these newly created upland environments.
Type de document :
Article de périodique
Source :
Physical geography, issn : 0272-3646, 2013, vol. 34, n°. 2, p. 124-135, nombre de pages : 12, Références bibliographiques : 36 ref.
Date :
2013
Editeur :
Pays édition : Royaume-Uni, Abingdon, Taylor and Francis
Langue :
Anglais
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)