IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2017  > Vol14 No.4
Role of debris flow on the change of 10Be concentration in rapidly eroding watersheds: a case study on the Seti River, central Nepal
KIM Dong Eun; SEONG Yeong Bae; CHOI Kwang Hee; YU Byung Yong
Corresponding AuthorSEONG Yeong Bae
2017-04
Source PublicationJournal of Mountain Science
ISSN1672-6316
Volume14Issue:4Pages:716-730
Subtype期刊论文
AbstractThe concentration of cosmogenic 10Be in riverine sediments has been widely used as a proxy for catchment-wide denudation rate (CWDR). One of the key assumptions of this approach is that sediments originating from sub-basins with different erosional histories are well mixed. A tragic debris flow occurred in the Seti River watershed, central Nepal, on May 5, 2012. This catastrophic debris flow was triggered by slope failure on the peak of Annapurna IV and resulted in many casualties in the lower Seti Khola. However, it provided an opportunity to test the assumption of equal mixing of sediments in an understudied rapidly eroding watershed. This study documents the CWDR of 10Be to evaluate the extent of the influence of episodic erosional processes such as debris flow on the spatio-temporal redistribution of 10Be concentrations. Our data show that the debris flow caused little change in CWDR across the debris flow event. In addition to isotopic measurement, we calculated denudation rates by using the modeled concentrations in pre- and post-landslide sediments based on the local 10Be productionrate. The modeled result showed little change across the event, indicating that the debris flow in May 2012 played a minor role in sediment evacuation, despite the rapid erosion in the catchment. Our study concludes that although the 2012 event caused many casualties and severe damage, it was a low-magnitude, high frequency event.
KeywordSeti River Beryllium-10(10be) Catchment-wide Denudation Rate (Cwdr) Debris Flow Episodic Erosional Processes
DOI10.1007/s11629-016-4282-y
Indexed BySCI
Language英语
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18553
CollectionJournal of Mountain Science_Journal of Mountain Science-2017_Vol14 No.4
Recommended Citation
GB/T 7714
KIM Dong Eun,SEONG Yeong Bae,CHOI Kwang Hee,et al. Role of debris flow on the change of 10Be concentration in rapidly eroding watersheds: a case study on the Seti River, central Nepal[J]. Journal of Mountain Science,2017,14(4):716-730.
APA KIM Dong Eun,SEONG Yeong Bae,CHOI Kwang Hee,&YU Byung Yong.(2017).Role of debris flow on the change of 10Be concentration in rapidly eroding watersheds: a case study on the Seti River, central Nepal.Journal of Mountain Science,14(4),716-730.
MLA KIM Dong Eun,et al."Role of debris flow on the change of 10Be concentration in rapidly eroding watersheds: a case study on the Seti River, central Nepal".Journal of Mountain Science 14.4(2017):716-730.
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