Effect of reservoir construction on suspended sediment load in a large river system : thresholds and complex response

Auteur(s) et Affiliation(s)

XU, J.

Inst. of Geographical Sciences and Natural Resources Research, Key Lab. for Water Cycle and Related Land Surface Processes, CAS, Beijing, Chine

YAN, Y.

Inst. of Geographical Sciences and Natural Resources Research, Key Lab. for Water Cycle and Related Land Surface Processes, CAS, Beijing, Chine

Description :
Based on hydrometric data in the upper Changjiang River basin, the change in behaviour of sediment transport of some dammed rivers was studied. As a result, some phenomena of threshold and complex response were found. The impacts of reservoir construction can be divided into several stages, including road construction, dam building and closure, water storage and sediment trapping. During these stages, some complex response was identified. At the station below the dam, the suspended sediment concentration (SSC) increases and reaches a maximum, and then declines sharply. This phenomenon was found on the main-stem and several major tributaries of the upper Changjiang River. In the Minjiang River, where a series of dams were built successively, the response of SSC is more complicated.

Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2010, vol. 35, n°. 14, p. 1666-1673, nombre de pages : 8, Références bibliographiques : 40 ref.

Date :
2010

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais