Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016WR019393 |
Tracer-based characterization of hyporheic exchange and benthic biolayers in streams | |
Knapp, Julia L. A.1,2; Gonzalez-Pinzon, Ricardo3; Drummond, Jennifer D.4; Larsen, Laurel G.2,5; Cirpka, Olaf A.1; Harvey, Judson W.2 | |
2017-02-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
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 | Germany; USA; Spain |
英文摘要 | Shallow benthic biolayers at the top of the streambed are believed to be places of enhanced biogeochemical turnover within the hyporheic zone. They can be investigated by reactive stream tracer tests with tracer recordings in the streambed and in the stream channel. Common in-stream measurements of such reactive tracers cannot localize where the processing primarily takes place, whereas isolated vertical depth profiles of solutes within the hyporheic zone are usually not representative of the entire stream. We present results of a tracer test where we injected the conservative tracer bromide together with the reactive tracer resazurin into a third-order stream and combined the recording of in-stream breakthrough curves with multidepth sampling of the hyporheic zone at several locations. The transformation of resazurin was used as an indicator of metabolism, and high-reactivity zones were identified from depth profiles. The results from our subsurface analysis indicate that the potential for tracer transformation (i.e., the reaction rate constant) varied with depth in the hyporheic zone. This highlights the importance of the benthic biolayer, which we found to be on average 2 cm thick in this study, ranging from one third to one half of the full depth of the hyporheic zone. The reach-scale approach integrated the effects of processes along the reach length, isolating hyporheic processes relevant for whole-stream chemistry and estimating effective reaction rates. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000398568800032 |
WOS关键词 | TRANSIENT STORAGE MODEL ; SOLUTE TRANSPORT ; SURFACE-WATER ; MASS-BALANCE ; RIVER ; ZONE ; GROUNDWATER ; SEDIMENTS ; BIOFILMS ; DENITRIFICATION |
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/20105 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Tubingen, Ctr Appl Geosci, Tubingen, Germany; 2.US Geol Survey, Natl Res Program, 959 Natl Ctr, Reston, VA 22092 USA; 3.Univ New Mexico, Dept Civil Engn, Albuquerque, NM 87131 USA; 4.Ctr Adv Studies Blanes CEAB CSIC, Integrat Freshwater Ecol Grp, Girona, Spain; 5.Univ Calif Berkeley, Dept Geog, Berkeley, CA 94720 USA |
推荐引用方式 GB/T 7714 | Knapp, Julia L. A.,Gonzalez-Pinzon, Ricardo,Drummond, Jennifer D.,et al. Tracer-based characterization of hyporheic exchange and benthic biolayers in streams[J]. WATER RESOURCES RESEARCH,2017,53(2). |
APA | Knapp, Julia L. A.,Gonzalez-Pinzon, Ricardo,Drummond, Jennifer D.,Larsen, Laurel G.,Cirpka, Olaf A.,&Harvey, Judson W..(2017).Tracer-based characterization of hyporheic exchange and benthic biolayers in streams.WATER RESOURCES RESEARCH,53(2). |
MLA | Knapp, Julia L. A.,et al."Tracer-based characterization of hyporheic exchange and benthic biolayers in streams".WATER RESOURCES RESEARCH 53.2(2017). |
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