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PORTAIL D'INFORMATION GÉOGRAPHIQUE

Spatial scale effects on sediment concentration in runoff during flood events for hilly areas of the Loess Plateau, China

Auteur(s) et Affiliation(s)

ZHENG, M.
Key Lab. of Water Cycle and Related Land Surface Processes, Inst. of Geographic Sciences and Natural Resources Research, CAS, Beijing, Chine
QIN, F.
College of Environment and Planning, Henan Univ., Kaifeng, Chine
SUN, L.
Key Lab. of Water Cycle and Related Land Surface Processes, Inst. of Geographic Sciences and Natural Resources Research, CAS, Beijing, Chine
QI, D.
Key Lab. of Water Cycle and Related Land Surface Processes, Inst. of Geographic Sciences and Natural Resources Research, CAS, Beijing, Chine
CAI, Q.
Key Lab. of Water Cycle and Related Land Surface Processes, Inst. of Geographic Sciences and Natural Resources Research, CAS, Beijing, Chine


Description :
The data on flow events observed at gauging stations and experimental plots, all located in the Dalihe watershed (north of Shaanxi Province), are presented. At the watershed scale, the scouring effect takes predominance first but is subordinate to the downstream dilution with a further increase in spatial scale. Therefore, the AA. propose a sediment-yield model, which is neither a physical-based model nor a regression model. This model, with only 2 variables (runoff depth and drainage basin area) and 2 parameters, can fairly accurate prediction of event sediment yield with a good efficiency if small events with runoff depth lower than 1 mm are excluded.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2011, vol. 36, n°. 11, p. 1499-1509, nombre de pages : 11, Références bibliographiques : 2 p.

Date :
2011

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

Langue :
Anglais
Droits :
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