Estimating groundwater-ephemeral stream exchange in hyper-arid environments: Field experiments and numerical simulations

doi:10.1016/j.jbydrol.2017.10.004

	Estimating groundwater-ephemeral stream exchange in hyper-arid environments: Field experiments and numerical simulations
	Wang, Ping 1; Pozdniakov, Sergey P.2; Vasilevskiy, Peter Yu.2
刊名	JOURNAL OF HYDROLOGY
	2017-12-01
卷号	555 页码:68-79
关键词	Surface-groundwater exchange Hydraulic conductivity Streambed clogging Heat transport HYDRUS-1D
ISSN号	0022-1694
DOI	10.1016/j.jbydrol.2017.10.004
通讯作者	Wang, Ping(wangping@igsnrr.ac.cn) ; Pozdniakov, Sergey P.(sppozd@geol.msu.ru)
英文摘要	Surface 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.
资助项目	National 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]
WOS关键词	RIVER-AQUIFER EXCHANGE ; LOWER HEIHE RIVER ; HYDRAULIC CONDUCTIVITY ; SPATIAL VARIABILITY ; NORTHWESTERN CHINA ; DRIVING FORCES ; COUPLED MODEL ; WATER-FLOW ; RECHARGE ; HEAT
WOS研究方向	Engineering ; Geology ; Water Resources
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000418107600006
资助机构	National 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
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/60766]
专题	中国科学院地理科学与资源研究所
通讯作者	Wang, Ping; Pozdniakov, Sergey P.
作者单位	1.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
推荐引用方式 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.