GSTDTAP  > 资源环境科学
DOI10.1002/2017WR022192
Estimating Surface/Subsurface Sediment Mixing in Karst Settings Using Be-7 Isotopes
Wicks, C. M.; Paylor, R. L.; Bentley, S. J.
2018-03-01
发表期刊WATER RESOURCES RESEARCH
ISSN0043-1397
EISSN1944-7973
出版年2018
卷号54期号:3页码:2487-2493
文章类型Article
语种英语
国家USA
英文摘要

This study shows that the cosmogenic radionuclide beryllium-7 can be used to track sediment movement through caves. The activities of beryllium-7 and cesium-137 were measured in two different karst settings at both surface and subsurface sites before and after storm runoff events. At one site, Be-7-enriched sediment was detected up to 1.5 km along a stream conduit after a moderate storm event; however, the activity of Cs-137 was too variable to show a meaningful pattern. The percentages of surface sediment that was found ranged from 0 to 52% along the entire 3 km cave stream and from 33 to 52% along the upper 1.5 km. At the other site, as much as 96% of the sediment initially discharged at the spring during a storm event was fresh surface material that had traveled into and through the cave stream. Moreover, during the 4 day runoff event, approximately 23% of the total suspended sediment flux was estimated to originate from surface erosion with 78% being reworked sediment from within the cave. The data in this study show that cosmogenic radionuclides with multiyear half-lives are too long-lived to track sediment origins in the caves; whereas, Be-7 with a 53.2 day half-life, can be used to track movement of sediment along cave streams.


英文关键词karst sediment isotopes
领域资源环境
收录类别SCI-E
WOS记录号WOS:000430364900059
WOS关键词TRACER ; SOIL ; BERYLLIUM-7 ; TRANSPORT ; AQUIFER ; WATER
WOS类目Environmental Sciences ; Limnology ; Water Resources
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/21487
专题资源环境科学
作者单位Louisiana State Univ, Dept Geol & Geophys, Baton Rouge, LA 70803 USA
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GB/T 7714
Wicks, C. M.,Paylor, R. L.,Bentley, S. J.. Estimating Surface/Subsurface Sediment Mixing in Karst Settings Using Be-7 Isotopes[J]. WATER RESOURCES RESEARCH,2018,54(3):2487-2493.
APA Wicks, C. M.,Paylor, R. L.,&Bentley, S. J..(2018).Estimating Surface/Subsurface Sediment Mixing in Karst Settings Using Be-7 Isotopes.WATER RESOURCES RESEARCH,54(3),2487-2493.
MLA Wicks, C. M.,et al."Estimating Surface/Subsurface Sediment Mixing in Karst Settings Using Be-7 Isotopes".WATER RESOURCES RESEARCH 54.3(2018):2487-2493.
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