Temporal variations of reservoir sediment sources in a small mountainous catchment in Korea

Auteur(s) et Affiliation(s)

KIM, J.K.

Quaternary Geology Research Dept., Korea Inst. of Geosciences and Mineral Resources, Daejeon, Coree, Republique de

ONDA, Y.

Dept. of Integrative Environmental Sciences, Graduate School of Life and Environmental Sciences, Univ., Tsukuba, Japon

YANG, D.-Y.

Quaternary Geology Research Dept., Korea Inst. of Geosciences and Mineral Resources, Daejeon, Coree, Republique de

KIM, M.S.

Dept. of Integrative Environmental Sciences, Graduate School of Life and Environmental Sciences, Univ., Tsukuba, Japon

Description :
Field measurements, sampling, and fingerprinting of reservoir sediment were undertaken from July 2005 to November 2007 in a mountainous catchment in Korea. Source fingerprinting of reservoir sediment was conducted using cesium-137 (137Cs). The relative contributions of gully bank and forest road, and forest floor material to reservoir sediment were calculated using a mixing model. Bank and forest road material, estimated to make up about 96% of the reservoir sediment, was the dominant source. Enormous reservoir sedimentation occurred during a heavy rainstorm with an 80-year recurrence time. To maintain the sustainability of the reservoir in this study, therefore, temporal and spatial preparation strategies for heavy rainstorms and bank and forest road erosion should be considered. However, spatial information on sediment sources from 137Cs fingerprinting is limited. To better identify the sediment sources spatially and temporally, further studies applying soil erosion models and more detailed field studies are needed.

Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2013, vol. 38, n°. 12, p. 1380-1392, nombre de pages : 13, Références bibliographiques : 2 p.

Date :
2013

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

Langue :
Anglais