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Recent News and Articles on the Keywords: seawater intrusion + coastal aquifers + contamination  Related to the article below (Last Update: 5/19/2008)


Hindu
Pilot project to arrest seawater intrusion
Hindu, India - May 17, 2008
CHENNAI: To arrest seawater intrusion at Besant Nagar, the Groundwater circle of the Public Works Department has proposed a pilot project to divert ...
Water raises concerns on Bainbridge, but is there a problem?
Kitsap Sun (Subscription),  United States - Apr 28, 2008
Seawater intrusion is an early sign of over-pumping, though the Kitsap Public Utility District has concluded that elevated levels of chloride seen in some ...

Jamaica Gleaner
North-coast development could threaten water supply, says ...
Jamaica Gleaner, Jamaica - May 10, 2008
A 2005 report by the Statistical Institute of Jamaica has also pointed to the slow drying up of freshwater supply due mainly to seawater intrusion in ...
One good, one bad project
Ventura County Star, CA - Apr 30, 2008
This recycled water can be used to irrigate crops rather than using well water, which causes seawater intrusion. This also means that our parks can have ...
We haven't given up on the Norfolk Broads
guardian.co.uk, UK - May 7, 2008
While the frequency of seawater overtopping the ridge is likely to increase, the lower, wider profile is expected to absorb more wave energy. ...
Laguna de Bay is wasting away
Manila Standard Today, Philippines - Apr 28, 2008
They now only have coconuts to eat because the crops they plant die of seawater intrusion and flooding. The atolls may be distant but we cannot deceive ...
WATER, FINANCE SUSTAINABILITY 2008: NEW DIRECTIONS FOR A THIRSTY ...
MaximsNews Network, NY - Apr 30, 2008
Distinction: Power Seraya (Singapore) which is a 10000 m3/d seawater desalination plant co-located at the 3100 MW Pulau Seraya Power Station. ...
Source: Google News

Simulation of seawater intrusion into the Khan Yunis area of the Gaza Strip coastal aquifer -
A Yakirevich, A Melloul, S Sorek, S Shaath, V … - Hydrogeology Journal, 1998 - Springer
... deterioration by intrusion of sea- water and brines ... present study focuses on the
seawater intrusion along hydrologic ... compared to salt-water intrusion near the ...

Development of Multiobjective Management Models for Coastal Aquifers -
A Das, B Datta - Journal of Water Resources Planning and Management, 1999 - pubs.asce.org
... exploitation and salinity control of a coastal aquifer. ... beneficial exploitation of
the aquifer and to ... remediate contamination due to seawater intrusion is also ...
-

[PDF] Submarine groundwater discharge and associated chemical input to a coastal sea -
L Li, DA Barry, F Stagnitti, JY Parlange - Water Resources Research, 1999 - hwcc.com.cn
... of this flux is related to the rate of seawater intrusion and the ... V SI is the volume
of intruded sea- water. ... 3.1. Intrusion Rate Required to Achieve a High C ...
-

… human activity on the dynamics of salt-water intrusion in three coastal aquifers in southern Spain -
ML Calvache, A Pulido-Bosch - Environmental Geology, 1997 - Springer
... Treatment of seawater intrusion ... modelling of groundwater flow and the freshwater/
sea-water contact zone ... State of intrusion Figure 3 represents the evolution of ...

[PDF] Identification and catabolic activity of well-derived gasoline-degrading bacteria from a … -
HF Ridgway, J Safarik, D Phipps, P Carl, D Clark - Applied and Environmental Microbiology, 1990 - desertwildlands.com
... consisted of a shallow coastal aquifer underlying the US ... aquifer bacteria. ... studies
indicated that the groundwater is brackish (from seawater intrusion) and ...

… intrusion and nitrate contamination in the Valley of Hermosillo and El Sahuaral coastal aquifers, … -
B Steinich, O Escolero, LE Mar?n - Hydrogeology Journal, 1998 - Springer
... 20% from the value expected for sea- water (857.5; Drever ... the presence of salt-water
intrusion in the ... value for seawater (857.5; Drever 1988) are represented ...

Boron Isotope Application for Tracing Sources of Contamination in Groundwater -
A Vengosh, KG Heumann, S Juraske, R Kasher - Environmental Science & Technology, 1994 - pubs.acs.org
... of groundwater, particularly in coastal areas, can be ... natural" causes such as seawater
intrusion, dissolution of ... water from adjacent aquifers, or anthropogenic ...

Water Wars -
JR Starr - Foreign Policy, 1991 - JSTOR
... by severe water shortages in Beirut, seawater intrusion in the coastal aquifer,
farm lands ... of irrigation water, and pipelines and aquifers severely damaged ...

Modeling and Analysis of Seawater Intrusion in the Coastal Aquifer of Eastern Cap-Bon, Tunisia -
C Paniconi, I Khlaifi, G Lecca, A Giacomelli, J … - Transport in Porous Media, 2001 - Springer
... economic consequences associated with seawater intrusion phenomena requires ... For
heavily-utilized aquifers in semi ... of the dynamics of coastal aquifers, as with ...

Time Domain Electromagnetic Soundings for Mapping Sea-Water Intrusion in Monterey County, California -
T Mills, P Hoekstra, M Blohm, L Evans - Ground Water, 1988 - Blackwell Synergy
... the "180-ft" zone from the coast to Gonzales ... area, water in the "400-ft" aquifer
is generally ... than that of Average Rates of Sea-water Intrusion Average Rates ...

Source: Google Scholar

Seawater intrusion is the first cause of contamination of coastal aquifers

- About 60 per cent of coastal aquifers are contaminated by seawater intrusion, a generalised phenomenon in 20 per cent of cases.
- Experts have found viable solutions implying not so much investment, but rather an ‘intelligent’ management of water resources.
- Scientists from France, Italy, Morocco, the Palestinian Authority, Spain, Switzerland and Tunisia have taken part in an international project to address sustainable water management in Mediterranean coastal aquifers.

C@MPUS DIGITAL Seawater intrusion is often the consequence of freshwater aquifers overexploitation. This is a very common and serious phenomenon all over the Mediterranean basin, as well as in other areas with similar weather conditions and population.

In Spain, the most severely affected areas by seawater intrusion are the Mediterranean and South-Atlantic coastlines. Given that Spain is located on a peninsula, seawater intrusion is currently one of the main causes of groundwater pollution. In fact, “about 60% of Spanish coastal aquifers are contaminated by seawater intrusion, a generalised phenomenon in 20% of cases”, points out Prof. José Benavente Herrera, a researcher from the Water Institute of the University of Granada (Universidad de Granada), Spain, and senior lecturer at the department of Geodynamics.
According to Prof. Benavente, “freshwater contaminated by a 5% of seawater can no longer be used for common purposes, such as human use, agriculture or farming. That is the reason why salinisation of coastal aquifers – mainly a consequence of an uncontrolled or deficient management – is such a serious phenomenon”. In Southern Spain, “seawater intrusion is contaminating some of the most important aquifer systems in economic terms”, both on the Mediterranean and the Atlantic coastlines. In the world, the most affected areas include Mexico, the North of the Pacific and Atlantic coastlines, Chile, Peru and Australia.

Solutions: prevention and control
A good knowledge of aquifers (subsoil) enables scientists to determine the ‘critical discharge’, i.e. the extent to what aquifers can support water catchments without seawater intrusion taking place. Experts in hydrogeology acknowledge that such is a complex question, but they can currently give advice on prevention and control of situations caused by human activity.

Prof. Benavente states that solutions to prevent salinisation should start by studying every aquifer individually. Therefore, reducing freshwater pumping should be followed by other measures, such as analysing the aquifer’s situation before building reservoirs upstream, as this will account for a serious minimisation of its natural recharge and, possibly, for salinisation if the return flow is not guaranteed. In fact, “ironic as it may be, building up an artificial reservoir could render useless the natural groundwater reservoir downstream”.

Also, says Benavente, in very localised seawater intrusion areas, reducing pumping or extracting water from either smaller or greater depths become indispensable measures. According to Benavente, artificial recharge of aquifers is another efficient measure to prevent salinisation, as it stops seawater intrusion and increases freshwater levels. In this sense, for instance, clean water obtained from urban sewage purification can be used for irrigation of crops and golf fields as well as to create a hydraulic barrier against seawater intrusion.

Some regions in the world – including Spain – are already implementing these measures. Prof. Benavente highlights Los Angeles, USA, and river Llobregat delta, Spain, where sewage water injection as mentioned above has proven to be useful to solve salinisation problems.

Teamwork experience
Among other research works, Prof. Benavente has recently coordinated the European Union Project SWIMED on Sustainable Water Management in Mediterranean coastal aquifers. Scientists from France, Italy, Morocco, the Palestinian Authority, Spain, Switzerland and Tunisia participated in this project, with a budget of 700,000 euros.
Prof. Benavente, together with other scientists from the Water Institute at the University of Granada, Spain, and from the other countries taking part in SWIMED, has published his research in prestigious international journals specialised in water management, such as Environmental Geology or Water Resources Management.


Reference:
Prof. Javier Cruz San Julián. Department of Geodynamics, University of Granada. Tel.: +34 958 24 33 56 / +34 659 03 91 34. E-mail: jjcruz@ugr.es.

Prof. José Benavente Herrera. Department of Geodynamics, University of Granada. Tel.: +34 958 24 33 62 / +34 609 17 05 24. E-mail: jbenaven@ugr.es.

Water Institute, University of Granada. Tel.: +34 958 24 80 16 / +34 958 24 80 20. E-mail: iagua@ugr.es. Web: http://www.ugr.es/~iagua.
 
 
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