Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016WR018917 |
Quantifying nitrate and oxygen reduction rates in the hyporheic zone using Rn-222 to upscale biogeochemical turnover in rivers | |
Pittroff, M.1,2; Frei, S.3; Gilfedder, B. S.1,3 | |
2017 | |
发表期刊 | WATER RESOURCES RESEARCH
![]() |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany |
英文摘要 | Quantifying and upscaling chemical turnover in the hyporheic zone (HZ) is difficult due to limited reaction rate data, unknown carbon quality, and few methods for upscaling local measurements to river networks. Here we develop a method for quantifying reaction kinetics in situ in the HZ and upscaling biogeochemical turnover to catchment scales. Radon-222 was used to quantify water residence times in the HZ of the Roter Main River (RM), Germany. Residence times were then combined with O-2, NO3-, CO2, DOC, and carbon quality (EEMs, SUVA) data to estimate Monod and first-order reaction rates. Monod parameters mu(max) and k(sat) for NO3- reduction were 11 mu mol l(-1) h(-1) and 52 mmol l(-1), respectively, while the first-order rate was 0.04 h(-1). Carbon quality was highly bioavailable in the HZ and is unlikely to be limiting. Reaction kinetics was incorporated into the FINIFLUX model to upscale NO3- mass loss over a 32 km reach of the RM. The aims were to (1) to estimate hyporheic efficiency using Damkohler numbers (Da), and (2) calculate NO3- mass loss in the HZ over the reach. The Da analysis suggests that the hyporheic zone is inefficient for NO3- processing, however, this is somewhat misleading as the largest NO3- mass loss occurs at the shortest residence times where Da << 1. This is due to the largest water flux occurring in the uppermost part of the sediment profile. Nitrate processing in the HZ accounted for 24 kg NO3- h(-1) over the reach, which was 20% of the NO3- flux from the catchment. |
英文关键词 | Radon hyporheic residence times nitrate kinetics Monod kinetics hyporheic zone upscaling nitrate loss FINIFLUX oxygen kinetics |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000394911200034 |
WOS关键词 | DISSOLVED ORGANIC-CARBON ; WATER RESIDENCE TIME ; FLUORESCENCE SPECTROSCOPY ; GROUNDWATER INFLOWS ; HYDROLOGIC EXCHANGE ; SOLUTE TRANSPORT ; ALLUVIAL AQUIFER ; STREAM CHEMISTRY ; RADON ; CATCHMENT |
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/21835 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Bayreuth, Limnol Res Stn, Bayreuth, Germany; 2.Karlsruhe, DVGW Technol Zentrum Wasser TZW, Abt Analyt & Wasserbeschaffenheit, Baden Wurttemberg, Germany; 3.Univ Bayreuth, Dept Hydrol, Bayreuth Ctr Ecol & Environm Res Bayceer, Bayreuth, Germany |
推荐引用方式 GB/T 7714 | Pittroff, M.,Frei, S.,Gilfedder, B. S.. Quantifying nitrate and oxygen reduction rates in the hyporheic zone using Rn-222 to upscale biogeochemical turnover in rivers[J]. WATER RESOURCES RESEARCH,2017,53(1). |
APA | Pittroff, M.,Frei, S.,&Gilfedder, B. S..(2017).Quantifying nitrate and oxygen reduction rates in the hyporheic zone using Rn-222 to upscale biogeochemical turnover in rivers.WATER RESOURCES RESEARCH,53(1). |
MLA | Pittroff, M.,et al."Quantifying nitrate and oxygen reduction rates in the hyporheic zone using Rn-222 to upscale biogeochemical turnover in rivers".WATER RESOURCES RESEARCH 53.1(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论