干旱区生态环境知识资源中心(Arid): Analytic solutions for fresh groundwater lenses floating on saline water under desert dunes: The Kunin-Van Der Veer legacy revisited

Arid

DOI	10.1016/j.jhydrol.2019.04.065
	Analytic solutions for fresh groundwater lenses floating on saline water under desert dunes: The Kunin-Van Der Veer legacy revisited
	Kacimov, A. R.1; Obnosov, Yu. V.2
通讯作者	Kacimov, A. R.
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2019
卷号	574 页码:733-743
英文摘要	A fully-saturated lens of steady fresh groundwater floating in a homogeneous and isotropic desert sandy aquifer is analytically studied based on a hydrological model by Kunin and interface solution by Van Der Veer. A static saline groundwater is beneath the lens. A phreatic surface of moving fresh water inside the lens is partially recharged (either naturally or by managed aquifer recharge) from the vadose zone and partially exfiltrates to it. A spatially focused recharge and intensive evapotranspiration preserve a steady downward-upward topology of fresh water motion. In terms of the 1-D Dupuit-Forchheimer approximation in a horizontal in-lens saturated flow a boundary value problem (BVP) for an ODE for the Strack potential is solved. The shape of the water table and, based on the Ghijben-Herzberg assumption, the interface are found. The total volume of the positive-pore pressure water flowing within the lens is evaluated. Constant infiltration and evaporation rates as well as evaporation linearly decreasing with depth of the water table (counted from the ground surface) are considered. The case of 2-D flow is tackled by the Toth model. A triangular analytic element approximates a half of the flow domain and consists of an isobaric side and two no-flow sides. Conformal mapping of this triangle onto a reference plane and solution of the Dirichlet BVP in a half-plane deliver the distribution of infiltration-exfiltration intensity along the water table, total flow rate and locus of the hinge point. A mathematically more cumbersome approximation of the flow domain assumes the water table to be a tilted straight line but the interface to be found as a free boundary. Solution of the corresponding BVP uses a curvilinear triangle in the hodograph plane.
英文关键词	Fresh-saline groundwater Interface Phreatic surface Conformal mappings 2-D Tothian and 1-D Dupuit-Forchheimer flow models Hydrology of arid desert dunes
类型	Article
语种	英语
国家	Oman ; Russia
收录类别	SCI-E
WOS记录号	WOS:000476962800057
WOS关键词	SOIL-WATER ; ISLAND ; FLOW ; INTERFACE ; AQUIFERS ; RECHARGE ; SEEPAGE ; FIELD ; CONDUCTIVITY ; INTRUSION
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/2XILL650/217155
作者单位	1.Sultan Qaboos Univ, Dept Soils Water & Agr Engn, POB 34, Al Khoud 123, Oman; 2.Kazan Fed Univ, Inst Math & Mech, Kazan, Russia
推荐引用方式 GB/T 7714	Kacimov, A. R.,Obnosov, Yu. V.. Analytic solutions for fresh groundwater lenses floating on saline water under desert dunes: The Kunin-Van Der Veer legacy revisited[J],2019,574:733-743.
APA	Kacimov, A. R.,&Obnosov, Yu. V..(2019).Analytic solutions for fresh groundwater lenses floating on saline water under desert dunes: The Kunin-Van Der Veer legacy revisited.JOURNAL OF HYDROLOGY,574,733-743.
MLA	Kacimov, A. R.,et al."Analytic solutions for fresh groundwater lenses floating on saline water under desert dunes: The Kunin-Van Der Veer legacy revisited".JOURNAL OF HYDROLOGY 574(2019):733-743.