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Estimating groundwater-ephemeral stream exchange in hyper-arid environments: Field experiments and numerical simulations
Wang, Ping1; Pozdniakov, Sergey P.2; Vasilevskiy, Peter Yu.2
2017-12-01
Source PublicationJOURNAL OF HYDROLOGY
ISSN0022-1694
Volume555Pages:68-79
Corresponding AuthorWang, Ping(wangping@igsnrr.ac.cn) ; Pozdniakov, Sergey P.(sppozd@geol.msu.ru)
AbstractSurface water infiltration from ephemeral dryland streams is particularly important in hyporheic exchange and biogeochemical processes in arid and semi-arid regions. However, streamflow transmission losses can vary significantly, partly due to spatiotemporal variations in streambed permeability. To extend our understanding of changes in streambed hydraulic properties, field investigations of streambed hydraulic conductivity were conducted in an ephemeral dryland stream in north-western China during high and low streamflow periods. Additionally, streamflow transmission losses were numerically estimated using combined stream and groundwater hydraulic head data and stream and streambed temperature data. An analysis of slug test data at two different river flow stages (one test was performed at a low river stage with clean water and the other at a high river stage with muddy water) suggested that sedimentation from fine-grained particles, i.e., physical clogging processes, likely led to a reduction in streambed hydraulic properties. To account for the effects of streambed clogging on changes in hydraulic properties, an iteratively increasing total hydraulic resistance during the slug test was considered to correct the estimation of streambed hydraulic conductivity. The stream and streambed temperature can also greatly influence the hydraulic properties of the streambed. One-dimensional coupled water and heat flux modelling with HYDRUS-1D was used to quantify the effects of seasonal changes in stream and streambed temperature on streamflow losses. During the period from 6 August 2014 to 4 June 2015, the total infiltration estimated using temperature-dependent hydraulic conductivity accounted for approximately 88% of that using temperature-independent hydraulic conductivity. Streambed clogging processes associated with fine particle settling/wash up cycles during flow events, and seasonal changes in streamflow temperature are two considerable factors that affect water infiltration in ephemeral dryland streams. Our results show that time series measurements of stream and sediment temperature and surface and groundwater head can be used to effectively determine the seasonal dynamics of streambed water exchange. Such combined heat and head monitoring at field sites is useful for calibrating regional surface-groundwater models. The results of this study may provide insights into hyporheic exchange in ephemeral dryland streams. (C) 2017 Elsevier B.V. All rights reserved.
KeywordSurface-groundwater exchange Hydraulic conductivity Streambed clogging Heat transport HYDRUS-1D
DOI10.1016/j.jbydrol.2017.10.004
WOS KeywordRIVER-AQUIFER EXCHANGE ; LOWER HEIHE RIVER ; HYDRAULIC CONDUCTIVITY ; SPATIAL VARIABILITY ; NORTHWESTERN CHINA ; DRIVING FORCES ; COUPLED MODEL ; WATER-FLOW ; RECHARGE ; HEAT
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41301025] ; National Natural Science Foundation of China-Russian Foundation for Basic Research (NSFC-RFBR) Programme[41511130025] ; National Natural Science Foundation of China-Russian Foundation for Basic Research (NSFC-RFBR) Programme[15-55-53010 GammaPhiEH_a] ; Fundamental Research Funds for the Central Universities[310829161005]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China-Russian Foundation for Basic Research (NSFC-RFBR) Programme ; Fundamental Research Funds for the Central Universities
WOS Research AreaEngineering ; Geology ; Water Resources
WOS SubjectEngineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS IDWOS:000418107600006
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/60767
Collection中国科学院地理科学与资源研究所
Corresponding AuthorWang, Ping; Pozdniakov, Sergey P.
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, 11A Datun Rd, Beijing 100101, Peoples R China
2.Lomonosov Moscow State Univ, Dept Hydrogeol, GSP 1, Moscow 119899, Russia
Recommended Citation
GB/T 7714
Wang, Ping,Pozdniakov, Sergey P.,Vasilevskiy, Peter Yu.. Estimating groundwater-ephemeral stream exchange in hyper-arid environments: Field experiments and numerical simulations[J]. JOURNAL OF HYDROLOGY,2017,555:68-79.
APA Wang, Ping,Pozdniakov, Sergey P.,&Vasilevskiy, Peter Yu..(2017).Estimating groundwater-ephemeral stream exchange in hyper-arid environments: Field experiments and numerical simulations.JOURNAL OF HYDROLOGY,555,68-79.
MLA Wang, Ping,et al."Estimating groundwater-ephemeral stream exchange in hyper-arid environments: Field experiments and numerical simulations".JOURNAL OF HYDROLOGY 555(2017):68-79.
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