Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016WR019722 |
Controls on solute concentration-discharge relationships revealed by simultaneous hydrochemistry observations of hillslope runoff and stream flow: The importance of critical zone structure | |
Kim, Hyojin1; Dietrich, William E.2; Thurnhoffer, Benjamin M.2; Bishop, Jim K. B.2,3; Fung, Inez Y.2 | |
2017-02-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | We investigated controls on concentration-discharge relationships of a catchment underlain by argillite by monitoring both groundwater along a hillslope transect and stream chemistry. Samples were collected at 1-3 day intervals over 4 years (2009-2013) in Elder Creek in the Eel River Critical Zone Observatory in California. Runoff at our study hillslope is driven by vadose zone flux through deeply weathered argillite (5-25 m thick) to a perched, seasonally dynamic groundwater that then drains to Elder Creek. Low flow derives from the slowly draining deepest perched groundwater that reaches equilibrium between primary and secondary minerals and saturation with calcite under high subsurface pCO(2). Arriving winter rains pass through the thick vadose zone, where they rapidly acquire solutes via cation exchange reactions (driven by high pCO(2)), and then recharge the groundwater that delivers runoff to the stream. These new waters displayed lower solute concentrations than the deep groundwater by less than a factor of 5 (except for Ca). Up to 74% of the total annual solute flux is derived from the vadose zone. The deep groundwater's Ca concentration decreased as it exfiltrates to the stream due to CO2 degassing and this Ca loss is equivalent of 30% of the total chemical weathering flux of Elder Creek. The thick vadose zone in weathered bedrock and the perched groundwater on underlying fresh bedrock result in two distinct processes that lead to the relatively invariant (chemostatic) concentration-discharge behavior. The processes controlling solute chemistry are not evident from stream chemistry and runoff analysis alone. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000398568800023 |
WOS关键词 | STEEP HEADWATER CATCHMENT ; UNCHANNELED CATCHMENT ; SUBSURFACE FLOW ; HYDROLOGIC RESPONSE ; NORTHERN CALIFORNIA ; FORESTED HILLSLOPE ; RESIDENCE TIME ; HUBBARD BROOK ; COASTAL BELT ; TRANSIT-TIME |
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/21790 |
专题 | 资源环境科学 |
作者单位 | 1.Penn State Univ, Earth & Engn Syst Inst, University Pk, PA 16802 USA; 2.Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA; 3.Lawrence Berkeley Natl Lab, Berkeley, CA USA |
推荐引用方式 GB/T 7714 | Kim, Hyojin,Dietrich, William E.,Thurnhoffer, Benjamin M.,et al. Controls on solute concentration-discharge relationships revealed by simultaneous hydrochemistry observations of hillslope runoff and stream flow: The importance of critical zone structure[J]. WATER RESOURCES RESEARCH,2017,53(2). |
APA | Kim, Hyojin,Dietrich, William E.,Thurnhoffer, Benjamin M.,Bishop, Jim K. B.,&Fung, Inez Y..(2017).Controls on solute concentration-discharge relationships revealed by simultaneous hydrochemistry observations of hillslope runoff and stream flow: The importance of critical zone structure.WATER RESOURCES RESEARCH,53(2). |
MLA | Kim, Hyojin,et al."Controls on solute concentration-discharge relationships revealed by simultaneous hydrochemistry observations of hillslope runoff and stream flow: The importance of critical zone structure".WATER RESOURCES RESEARCH 53.2(2017). |
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