干旱区生态环境知识资源中心(Arid): The evolutional states of seasonally losing unclogged stream-groundwater systems

Arid

DOI	10.1016/j.jhydrol.2021.127012
	The evolutional states of seasonally losing unclogged stream-groundwater systems
	Cheng, Dawei; Zhan, Hongbin; Hou, Xinyue; Guo, Jinqi; Feng, Shen
通讯作者	Zhan, HB (corresponding author), Texas A&M Univ, Dept Geol & Geophys, College Stn, TX 77843 USA.
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2021
卷号	603
英文摘要	Losing streams are widespread in arid and semi-arid regions. Exploring the evolutional states of losing stream-groundwater systems is of great significance to understand the exchanges of water, mass and energy in stream-aquifer systems. This study is devoted to investigate the evolutional process of infiltration flux, pressure head and flow states of a seasonally losing stream-groundwater system with the semi-permeable streambeds missing (or without clogging). The paper constructs a new theoretical framework for the evolutional states of the system. In particular, it focuses on investigating the transition among different evolutional states including disconnected state, transitional state, negative-pressure connected state and positive-pressure connected state, and the critical conditions of transition between connected and disconnected states. The critical conditions associated with disconnection or connection are that 1) the zero-flux zone starts to disappear, 2) the unsaturated zone starts to disappear, and 3) the negative pressure zone starts to disappear. Analytical solutions of those critical conditions are proposed. The evolutional process of stream leakage is characterized into two stages: the first stage corresponds to the disconnected and transitional states in which the seepage fluxes decrease with time; the second stage corresponds to the fully connected state in which the seepage flux decreases rapidly again as time developing. Finally, the influence of various controlling parameters on the critical conditions is analyzed. The critical time (t(CRI1)) and critical depth (z(CRI1)) of changing from the disconnected state to the transitional state have nonlinear correlations with saturated hydraulic conductivity (K-s), pore-size distribution index (A) and flux at the base of the unconfined aquifer (q). The critical time (t(CRI2)) and the critical depth (z(CRI2)) of changing from the transitional state to the negative-pressure connected state and the critical time (t(CRI3)) of changing from the negative-pressure connected state to the positive-pressure connected state all have nonlinear correlations with K-s and lambda.z(CRI1) and Z(CRI2) are independent of saturated water content (theta(s)) and residual water content WO. An innovative physical interpretation is given to system evolutional states and quantifiable criteria for those evolutional states are proposed. The findings of this study can help better understand the evolutional states of seasonally losing stream-groundwater systems, and it lays a foundation for further research on water exchange, mass transport and ecological protection in stream-groundwater systems.
英文关键词	Stream-groundwater systems Losing streams Unclogged streams Evolutional states Critical conditions
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000706318300080
WOS关键词	HYPORHEIC ZONE ; WATER-QUALITY ; AQUIFER ; RIVER ; FLOW ; RECHARGE
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/2XILL650/363931
作者单位	[Cheng, Dawei; Hou, Xinyue; Guo, Jinqi; Feng, Shen] Changan Univ, Sch Water & Environm, Xian, Peoples R China; [Cheng, Dawei; Hou, Xinyue; Guo, Jinqi; Feng, Shen] Changan Univ, Key Lab Subsurface Hydrol & Ecol Effects Arid Reg, Xian, Peoples R China; [Zhan, Hongbin] Texas A&M Univ, Dept Geol & Geophys, College Stn, TX 77843 USA
推荐引用方式 GB/T 7714	Cheng, Dawei,Zhan, Hongbin,Hou, Xinyue,et al. The evolutional states of seasonally losing unclogged stream-groundwater systems[J],2021,603.
APA	Cheng, Dawei,Zhan, Hongbin,Hou, Xinyue,Guo, Jinqi,&Feng, Shen.(2021).The evolutional states of seasonally losing unclogged stream-groundwater systems.JOURNAL OF HYDROLOGY,603.
MLA	Cheng, Dawei,et al."The evolutional states of seasonally losing unclogged stream-groundwater systems".JOURNAL OF HYDROLOGY 603(2021).