Analytical solution for a sharp interface problem in sea water intrusion into a coastal aquifer

2001 ◽  
Vol 457 (2016) ◽  
pp. 3023-3038 ◽  
Author(s):  
A. R. Kacimov ◽  
Yu. V. Obnosov
Keyword(s):  
Analytical Solution ◽  
Coastal Aquifer ◽  
Sea Water ◽  
Sharp Interface ◽  
Interface Problem ◽  
Sea Water Intrusion ◽  
Water Intrusion

Tracing the evidence of sea water intrusion in the coastal aquifer of Adhirampattinam, India, using hydro-chemical analysis

2012 ◽  
Vol 18 (2) ◽  
pp. 90-100 ◽  
Author(s):  
C.R. Suribabu ◽  
S. Ravindar ◽  
S. Ananadapadmanaban ◽  
S. Seshadri ◽  
J. Bhaskar
Keyword(s):  
Chemical Analysis ◽  
Coastal Aquifer ◽  
Sea Water ◽  
Sea Water Intrusion ◽  
Water Intrusion

Mixing at the interface between two fluids in porous media: a boundary-layer solution

2007 ◽  
Vol 584 ◽  
pp. 455-472 ◽  
Author(s):  
AMIR PASTER ◽  
GEDEON DAGAN
Keyword(s):  
Boundary Layer ◽  
Sea Water ◽  
Mixing Layer ◽  
Sharp Interface ◽  
Sea Water Intrusion ◽  
Water Intrusion ◽  
Two Fluids ◽  
The Past ◽  
Boundary Layer Solution ◽  
Layer Solution

A lighter fluid (fresh water) flows steadily above a body of a standing heavier one (sea water) in a porous medium. If mixing by transverse pore-scale dispersion is neglected, a sharp interface separates the two fluids. Solutions for interface problems have been derived in the past, particularly for the case of interest here: sea-water intrusion in coastal aquifers. The Péclet number characterizing mixing, Pe = b′/αT where b′ is the aquifer thickness and αT is transverse dispersivity, is generally much larger than unity. Mixing is nevertheless important in a few applications, particularly in the development of a transition layer near the interface and in entrainment of sea water within this layer. The equations of flow and transport in the mixing zone comprise the unknown flux, pressure and concentration fields, which cannot be separated owing to the presence of density in the gravity term. They are nonlinear because of the advective term and the dependence of the dispersion coefficients on flux, the latter making the problem different from that of mixing between streams in laminar viscous flow.The aim of the study is to solve the mixing-layer problem for sea-water intrusion by using a boundary-layer approximation, which was used in the past for the case of uniform flow of the upper fluid, whereas here the two-dimensional flux field is non-uniform. The boundary-layer solution is obtained in a few steps: (i) analytical potential flow solution of the upper fluid above a sharp interface is adopted; (ii) the equations are reformulated with the potential and streamfunction of this flow serving as independent variables; (iii) boundary-layer approximate equations are formulated in terms of these variables; and (iv) simple analytical solutions are obtained by the von Káarmán integral method. The agreement with an existing boundary-layer solution for uniform flow is excellent, and similarly for a solution of a particular case of sea-water intrusion with a variable-density code. The present solution may serve for estimating the thickness of the mixing layer and the rate of sea-water entrainment in applications, as well as a benchmark for more complex problems.

Application of an Analytical Solution as a Screening Tool for Sea Water Intrusion

Ground Water ◽  
2016 ◽  
Vol 54 (5) ◽  
pp. 709-718 ◽  
Author(s):  
Calvin R. Beebe ◽  
Grant Ferguson ◽  
Tom Gleeson ◽  
Leanne K. Morgan ◽  
Adrian D. Werner
Keyword(s):  
Analytical Solution ◽  
Screening Tool ◽  
Sea Water ◽  
Sea Water Intrusion ◽  
Water Intrusion

scholarly journals Aquifer Unit Management Plan (AUMP) For Groundwater Resources Management of Multi-layered Coastal Aquifer System

2021 ◽  
Author(s):  
Devadasan Gnanasundar ◽  
Mohanavelu Senthilkumar
Keyword(s):  
Coastal Aquifer ◽  
Sea Water ◽  
Groundwater Resources ◽  
Management Plan ◽  
Sea Water Intrusion ◽  
Resources Management ◽  
Aquifer System ◽  
Water Intrusion ◽  
Unit Management ◽  
Aquifer Unit

Abstract To address the vulnerability of coastal aquifer to over exploitation and sea water intrusion, a groundwater resources management plan titled as Aquifer Unit Management Plan (AUMP) is designed to provide valuable guidance for groundwater management of a multi-layered cuddalore coastal aquifer system located east coast of South India. The aquifer unit management plan is based on the summative examination of the aquifer unit disposition, response of hydraulic heads to recharge and discharge and effect of increased pumping on aquifer hydraulics. The safe hydraulic heads and annual exploitable potential were considered as the guiding factors to manage fresh groundwater resources of the coastal aquifer. The results show that the process of sea water intrusion has already started and with the present rate of pumping (1034.86 mcmy-1), the sea water intrusion risk has increased manifold all along the coast. The salient management strategies recommended are; restricting pumping to 695 mcmy-1, stepping up recharge activities in recharge zone, adopting water use efficiency methods and regulation in the coastal zone. AUMP is simple and can guide water managers to plan for sustainable groundwater withdrawal and safe guard the coastal aquifer from sea water intrusion and ensure sustainability of groundwater abstraction structures.

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