inscription
PORTAIL D'INFORMATION GÉOGRAPHIQUE

Quantitative study on influences of terraced field construction and check-dam siltation on soil erosion

Auteur(s) et Affiliation(s)

GAO, H.
Inst. of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, Shaanxi, Yangling, Chine
LI, Z.
Inst. of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, Shaanxi, Yangling, Chine
Key Lab. of Northwest Water Resources and Environment Ecology of MOE, Univ. of Technology, Xi'an, Chine
LI, P.
Key Lab. of Northwest Water Resources and Environment Ecology of MOE, Univ. of Technology, Xi'an, Chine
JIA, L.
Upper and Middle Yellow River Bureau, Yellow River Conservancy Commission of the Ministry of Water Resources, Xi'an, Chine
ZHANG, X.
Key Lab. of Northwest Water Resources and Environment Ecology of MOE, Univ. of Technology, Xi'an, Chine


Description :
To study the influences of terraced field construction and check-dam siltation on soil erosion of a watershed, the AA. built a simplified watershed model for the Loess Plateau hilly-gully region including terraced fields, slope farmlands, steep-slope grasslands, and dam farmlands, and defined 3states of watershed (i.e., pioneer, intermediate, and climax stages, respectively). Then, the watershed soil erosion moduli at various stages were studied by using a revised universal soil loss equation. The results show that the pioneer and climax stages are the extreme states of watershed soil-and-water conservation and control. In the intermediate stage, the soil erosion modulus above the edge of gully exhibited an exponential decline along with the increase in terraced field area percentage, while the soil erosion modulus below the edge of gully exhibited a linear decline along with the increase in siltation heigh.


Type de document :
Article de périodique

Source :
Journal of geographical sciences. Acta geographica sinica, issn : 1009-637X, 2012, vol. 22, n°. 5, p. 946-960, nombre de pages : 15, Références bibliographiques : 30 ref.

Date :
2012

Editeur :
Pays édition : Chine

Langue :
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)