Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2017WR021684 |
Direct Channel Precipitation and Storm Characteristics Influence Short-Term Fallout Radionuclide Assessment of Sediment Source | |
Karwan, D. L.1,2,3; Pizzuto, J. E.2; Aalto, R.4; Marquard, J.4; Harpold, A.5; Skalak, K.6; Benthem, A.6; Levia, D. F.7,8; Siegert, C. M.7,9; Aufdenkampe, A. K.2,10 | |
2018-07-01 | |
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:7页码:4579-4594 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; England |
英文摘要 | Fallout radionuclides (FRNs) and their ratios, such as Beryllium-7 (Be-7) and excess Lead-210 (Pb-210(xs)), have been used to determine suspended sediment source and age in catchments. These models are based on numerous assumptions, for example, that channel deposition of FRNs from precipitation is negligible in comparison to their delivery to the channel from land surface erosion during individual storm events. We test this assumption using a mass balance approach during eight storms from summer 2011 to fall 2012 in a mid-Atlantic United States piedmont region watershed with mixed land use. Event peak discharge and storm type corresponded to the importance of direct channel FRN deposition from precipitation. During relatively low discharge summer thunderstorms, with minimal overland flow, less than 1% of Be-7 and Pb-210(xs) flux deposited on the watershed exits the watershed associated with suspended sediment. The majority but not all deposited on the stream channel exits the watershed associated with suspended sediment (60% of Be-7 and 80% of Pb-210(xs)). Here precipitation and throughfall onto the wetted channel area can be responsible for any FRN newly associated with suspended sediment, as opposed to landscape surface erosion. Furthermore, FRNs can be stored with sediments in the channel between events. Events with higher discharges, including hurricanes, show the opposite pattern-FRN flux associated with suspended sediment exported from the reach is greater than channel FRN wet deposition, suggesting net erosion from the watershed landscape and/or stored material during these types of storms. |
英文关键词 | suspended sediment Beryllium-7 Lead-210 channel interception extreme event |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000442502100023 |
WOS关键词 | ORGANIC-MATTER ; METEORIC BE-7 ; SOURCE AREA ; PB-210 ; RIVER ; BERYLLIUM-7 ; TRANSPORT ; DYNAMICS ; TRACER ; CATCHMENTS |
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/21375 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Minnesota, Dept Forest Resources, St Paul, MN 55455 USA; 2.Univ Delaware, Dept Geol Sci, Newark, DE 19716 USA; 3.Stroud Water Res Ctr, Avondale, PA 19311 USA; 4.Univ Exeter, Coll Life & Environm Sci, Exeter, Devon, England; 5.Univ Nevada, Nat Resources & Environm Sci Dept, Reno, NV 89557 USA; 6.US Geol Survey, Hydrodynam Branch, 959 Natl Ctr, Reston, VA 22092 USA; 7.Univ Delaware, Dept Geog, Newark, DE USA; 8.Univ Delaware, Dept Plant & Soil Sci, Newark, DE 19717 USA; 9.Mississippi State Univ, Dept Forestry, Mississippi State, MS 39762 USA; 10.LimnoTech, Oakdale, MN USA |
推荐引用方式 GB/T 7714 | Karwan, D. L.,Pizzuto, J. E.,Aalto, R.,et al. Direct Channel Precipitation and Storm Characteristics Influence Short-Term Fallout Radionuclide Assessment of Sediment Source[J]. WATER RESOURCES RESEARCH,2018,54(7):4579-4594. |
APA | Karwan, D. L..,Pizzuto, J. E..,Aalto, R..,Marquard, J..,Harpold, A..,...&Aufdenkampe, A. K..(2018).Direct Channel Precipitation and Storm Characteristics Influence Short-Term Fallout Radionuclide Assessment of Sediment Source.WATER RESOURCES RESEARCH,54(7),4579-4594. |
MLA | Karwan, D. L.,et al."Direct Channel Precipitation and Storm Characteristics Influence Short-Term Fallout Radionuclide Assessment of Sediment Source".WATER RESOURCES RESEARCH 54.7(2018):4579-4594. |
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