干旱区生态环境知识资源中心(Arid): Where the water goes: Partitioning surface flow and streambed infiltration in an ephemeral river laboratory experiment

Arid

DOI	10.1016/j.jhydrol.2023.130159
	Where the water goes: Partitioning surface flow and streambed infiltration in an ephemeral river laboratory experiment
	Partington, Daniel; Shanafield, Margaret; Banks, Eddie W.; Andersen, Martin S.; Rau, Gabriel C.; Felder, Stefan; Simmons, Craig T.
通讯作者	Partington, D
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2023
卷号	626
英文摘要	Ephemeral and intermittent flow in dryland streams plays a vital role in supporting delicate ecosystems and recharging groundwater in underlying aquifers. Despite extensive research, accurately predicting surface runoff, streambed water infiltration, and groundwater recharge during ephemeral streamflow events remains challenging due to the complex physical processes involved. Such processes are logistically difficult to observe in the field and should not be assessed through numerical studies alone. To tackle this complexity, we utilized an 8 m long, 0.25 m wide, and 0.6 m deep laboratory flume filled with fine sand as a physical model for event flows along a dry stream. This flume allowed us to measure both streamflow and streambed infiltration volumetrically as the stream wetting front advanced along its length during 8 steady inflow rates. The flume was divided into separate compartments to measure water across the sediment surface (streamflow) and water exiting through the flume's bottom (groundwater recharge). To validate our physical tests, we compared them with simulated flows in an integrated surface-subsurface hydrological numerical model. The model results exhibited good agreement with the observed stream and groundwater dynamics. Through a parametric numerical investigation, we identified that hydraulic conductivity significantly controlled the rate of surface infiltration and the advancement of the stream wetting front. Interestingly, we found a linear relationship between surface discharge and stream wetting front location, as well as groundwater recharge, under steady-state conditions, in line with the governing equations. However, our simulations of variable streambed heterogeneity and elevation unveiled the crucial influence of these factors in determining the timing of downstream flow progression. This insight is essential for establishing ecological connectivity along non-perennial rivers and has significant implications for delivering environmental flows in arid regions where ephemeral rivers are prevalent. Our study underscores the value of flume experiments in elucidating the transient physical processes during surface water and groundwater interactions in intermittent streams. By employing a combination of physical modelling and numerical simulations, we advance our understanding of these vital hydrological interactions, contributing to sustainable water management practices in semi-arid and arid environments.
英文关键词	Intermittent streams Groundwater recharge Flume experiments Numerical modelling Transmission loss
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001084344700001
WOS关键词	1ST-ORDER EXCHANGE COEFFICIENT ; TRANSMISSION LOSSES ; GROUNDWATER INTERACTIONS ; FLUME ; DYNAMICS ; CHANNELS ; INTERMITTENT ; SEEPAGE ; SIMULATION ; STREAMFLOW
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397425
推荐引用方式 GB/T 7714	Partington, Daniel,Shanafield, Margaret,Banks, Eddie W.,et al. Where the water goes: Partitioning surface flow and streambed infiltration in an ephemeral river laboratory experiment[J],2023,626.
APA	Partington, Daniel.,Shanafield, Margaret.,Banks, Eddie W..,Andersen, Martin S..,Rau, Gabriel C..,...&Simmons, Craig T..(2023).Where the water goes: Partitioning surface flow and streambed infiltration in an ephemeral river laboratory experiment.JOURNAL OF HYDROLOGY,626.
MLA	Partington, Daniel,et al."Where the water goes: Partitioning surface flow and streambed infiltration in an ephemeral river laboratory experiment".JOURNAL OF HYDROLOGY 626(2023).