Pumping of Brackish and Saline Water in Coastal Aquifers: An Effective Tool for Alleviation of Seawa...
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Pumping of Brackish and Saline Water in Coastal Aquifers: An Effective Tool for Alleviation of Seawater Intrusion. Mohsen Sherif Civil and Environmental Eng. Department College of Engineering, UAE University United Arab Emirates. Anvar Kacimov Department of Soils, Water and

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Pumping of Brackish and Saline Water in Coastal Aquifers: An Effective Tool for Alleviation of Seawater Intrusion

Mohsen Sherif

Civil and Environmental Eng. Department

College of Engineering, UAE University

United Arab Emirates

Anvar Kacimov

Department of Soils, Water and

Agricultural Engineering, SQU University

Sultanate of Oman

23 June 2008


Seawater Intrusion into Coastal Aquifers Effective Tool for Alleviation of Seawater Intrusion

Factors Affecting Seawater Intrusion

  • Type of aquifer and its geometry and geology

  • Water table and pizometric heads

  • Natural rates of flow

  • Irrigation and agricultural practices

  • Pumping and recharge events

  • Rainfall intensities and frequencies

  • Seawater concentration and density

  • Characteristics and parameters of the porous medium

  • Geometric and hydraulic boundaries

  • Tidal effects

  • Earthquakes and vibrational effects

  • Others

Which of these factors are important?

It depends on the problem


Mitigation of Seawater Intrusion Effective Tool for Alleviation of Seawater Intrusion

  • Inevitable process

  • Pumping activities and intrusion rates

Measures to Control Seawater Intrusion

  • Reduce the pumping rates

  • Reallocation of pumping fields

  • Land use and agriculture practices

  • Artificial recharge of groundwater

  • Use of Scavenger wells


Objective and study domain
Objective and Study Domain Effective Tool for Alleviation of Seawater Intrusion

  • Examine the possibility of reducing seawater intrusion by pumping of saline (brackish) groundwater.

6 m (asl)

4 m (asl)

4000 elements (5.0 x 2.5 m)

4221 nodes

50 m

H2 = 4 + k (50 –y)

Hmax = 5.25 m

1000 m

n = 0.25, kx = 10-6 m2, ky = 10-7 m2, α = 5 m

ρf = 1000 kg/m3 , ρs = 1025 kg/m3


Tested scenarios
Tested Scenarios Effective Tool for Alleviation of Seawater Intrusion

6 m

4 m

Steady State equi-concentration lines

Run 1

140 m 105 m

Steady State velocity vectors

5 m

4 m

Reduced hydraulic head at the land side

Run 2

277 m 196 m


Effect of Pumping Effective Tool for Alleviation of Seawater Intrusion

6 m

4 m

Q1

Pumping 86 m3/d: Steady state

Run 3

Q1

Q1

Pumping 86 m3/d from two locations at land

and sea side boundaries: Steady state


Effect of Pumping Effective Tool for Alleviation of Seawater Intrusion

Q1

Q2

4 m

6 m

Q1 = 86 m3/d and Q2 = 130 m3/d

Steady State equi-concentration lines

Run 5


Pumping from a single well
Pumping from a single well Effective Tool for Alleviation of Seawater Intrusion

Basic Run

Group 1

Run 1

Group 1

Run 2

Group 1

Run 3

Group 2

Run 4

Group 2

Run 6

Group 3

Run 7

Group 3

Run 8

Group 3

Run 9


Thank you
Thank You Effective Tool for Alleviation of Seawater Intrusion


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