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Assessment of sediment yield in a small karst catchment by using Cs-137 tracer technique
Yan, Dong-chun1,2; Zhang, Xin-bao1; Wen, An-bang1; He, Xiu-bin1; Long, Yi1
Corresponding AuthorYan, Dong-chun
2012
Source PublicationINTERNATIONAL JOURNAL OF SEDIMENT RESEARCH
ISSN1001-6279
Volume27Issue:4Pages:547-554
SubtypeArticle
AbstractThere is very thin soil layer in karst rocky desertification areas in Southwest China, sediment deposition and sediment yield in the karst area affects the development of vegetation greatly. In the present study, the Cs-137 technique was used to assess the rate of sediment deposition and sediment yield in a small karst catchment. The Cs-137 inventory within the depression varied between 800 m(-2) and 2,200 Bq m(-2), with the mean value of 1,500.1 Bq m(-2). The Cs-137 reference inventory at a nearby reference site was 805.9 Bq m(-2). It could be inferred to that sediment deposition had occurred in the catchment. The mean depth of sediments deposition in the depression was 6 cm and the deposition rate was approximately 0.13 cm yr(-1). The analysis of the topographic characteristics of the catchment revealed that the sediment deposition occurred mainly at the lower part of the small catchment. Although, there was a sinkhole in the depression, little sediment had drained out with runoff through the sinkhole, because the local people built ridges around the sinkholes for storing water. According to this, sediment yield rate in the small catchment was estimated to be approximately 19.25 to 27.5 t km(-2) yr(-1), and the extremely low sediment yield was maybe the main obstacle to vegetation restoration in karst rocky desertification areas.
KeywordCs-137 Sediment Deposition Sediment Yield Karst Depression Southwest China
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine ; Physical Sciences
WOS Subject ExtendedEnvironmental Sciences & Ecology ; Water Resources
Indexed BySCI
WOS KeywordOVERBANK SEDIMENTATION ; ACCUMULATION RATES ; FALLOUT CESIUM-137 ; DEPOSITION RATES ; SOUTHWEST CHINA ; DRAINAGE-BASIN ; SOIL-EROSION ; RESERVOIR ; RIVER ; LAKE
Language英语
Quartile4区
TOP
WOS SubjectEnvironmental Sciences ; Water Resources
WOS IDWOS:000312894800012
Funding Organization973 program(2006CB403203) ; Chinese Science and Technology Ministry(2008BAD98B01)
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/9895
Collection山地表生过程与生态调控重点实验室
科技与合作处
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Environm Evolut & Regulat, Chengdu 610041, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Yan, Dong-chun,Zhang, Xin-bao,Wen, An-bang,et al. Assessment of sediment yield in a small karst catchment by using Cs-137 tracer technique[J]. INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH,2012,27(4):547-554.
APA Yan, Dong-chun,Zhang, Xin-bao,Wen, An-bang,He, Xiu-bin,&Long, Yi.(2012).Assessment of sediment yield in a small karst catchment by using Cs-137 tracer technique.INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH,27(4),547-554.
MLA Yan, Dong-chun,et al."Assessment of sediment yield in a small karst catchment by using Cs-137 tracer technique".INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH 27.4(2012):547-554.
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