Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017WR022192 |
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
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
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 |
推荐引用方式 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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