Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017WR020667 |
Coupled Long-Term Simulation of Reach-Scale Water and Heat Fluxes Across the River-Groundwater Interface for Retrieving Hyporheic Residence Times and Temperature Dynamics | |
Munz, Matthias1; Oswald, Sascha E.1; Schmidt, Christian2 | |
2017-11-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany |
英文摘要 | Flow patterns in conjunction with seasonal and diurnal temperature variations control ecological and biogeochemical conditions in hyporheic sediments. In particular, hyporheic temperatures have a great impact on many temperature-sensitive microbial processes. In this study, we used 3-D coupled water flow and heat transport simulations applying the HydroGeoSphere code in combination with high-resolution observations of hydraulic heads and temperatures to quantify reach-scale water and heat flux across the river-groundwater interface and hyporheic temperature dynamics of a lowland gravel bed river. The model was calibrated in order to constrain estimates of the most sensitive model parameters. The magnitude and variations of the simulated temperatures matched the observed ones, with an average mean absolute error of 0.7 degrees C and an average Nash Sutcliffe efficiency of 0.87. Our results indicate that nonsubmerged streambed structures such as gravel bars cause substantial thermal heterogeneity within the saturated sediment at the reach scale. Individual hyporheic flow path temperatures strongly depend on the flow path residence time, flow path depth, river, and groundwater temperature. Variations in individual hyporheic flow path temperatures were up to 7.9 degrees C, significantly higher than the daily average (2.8 degrees C), but still lower than the average seasonal hyporheic temperature difference (19.2 degrees C). The distribution between flow path temperatures and residence times follows a power law relationship with exponent of about 0.37. Based on this empirical relation, we further estimated the influence of hyporheic flow path residence time and temperature on oxygen consumption which was found to partly increase by up to 29% in simulations. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000418736700014 |
WOS关键词 | 1ST-ORDER EXCHANGE COEFFICIENT ; GLOBAL SENSITIVITY-ANALYSIS ; SURFACE-SUBSURFACE FLOW ; SOLUTE TRANSPORT ; DISSOLVED-OXYGEN ; NONUNIFORM FLOW ; THERMAL REGIME ; STREAM WATER ; ZONE ; AQUIFER |
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/21859 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Potsdam, Inst Earth & Environm Sci, Potsdam, Germany; 2.UFZ, Helmholtz Ctr Environm Res, Dept Hydrogeol, Leipzig, Germany |
推荐引用方式 GB/T 7714 | Munz, Matthias,Oswald, Sascha E.,Schmidt, Christian. Coupled Long-Term Simulation of Reach-Scale Water and Heat Fluxes Across the River-Groundwater Interface for Retrieving Hyporheic Residence Times and Temperature Dynamics[J]. WATER RESOURCES RESEARCH,2017,53(11). |
APA | Munz, Matthias,Oswald, Sascha E.,&Schmidt, Christian.(2017).Coupled Long-Term Simulation of Reach-Scale Water and Heat Fluxes Across the River-Groundwater Interface for Retrieving Hyporheic Residence Times and Temperature Dynamics.WATER RESOURCES RESEARCH,53(11). |
MLA | Munz, Matthias,et al."Coupled Long-Term Simulation of Reach-Scale Water and Heat Fluxes Across the River-Groundwater Interface for Retrieving Hyporheic Residence Times and Temperature Dynamics".WATER RESOURCES RESEARCH 53.11(2017). |
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