Arid land hydrogeology : in search of a solution to a by A M O Mohamed; UAE-Japan Symposium on Sustainable GCC

By A M O Mohamed; UAE-Japan Symposium on Sustainable GCC Environment and Water Resources

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The space occupied by the compartments would reduce the width of the canal from 50 m to 20 m, which would still leave sufficient space for the practice of aquatic activities. The total estimated cost for implementing this option is about Can$10 million. 4 Alternative 4: Off-site solidification/stabilization Solidification/stabilization, as discussed by Mohamed and Antia (1998), is a treatment technique already in use in various parts of the world. The technique is suitable for treatment of heavy metals 54 Copyright © 2006 Taylor & Francis Group plc, London, UK and oils and greases at low concentrations.

This is due to high density of septic tanks, located in the highly permeable sandy soil. Groundwater of eastern coast, in general and Sainthamaruthu in particular, can be considered highly vulnerable for contamination, as there is no mechanism to regulate the use of water or control pollution. This situation results in a decrease in quantity of available safe water posing threat to sustainability in future. Therefore, the public living in this area has to be advised to take necessary protective measures to maintain hygienic conditions against water contamination.

These criteria are discussed below. 1 Permanent environmental criteria Option 1: Elimination of pollution in canal sediment This option is used to evaluate whether an option is able to decontaminate the canal sediments. Treatment options eliminate pollution. In containment and fixation options, pollutants are still present, although they are immobilized. The criterion reflects a concern that the sediment pollution problem should, if possible, be permanently resolved. This means that options which ensure permanent sediment cleanup should be preferred over others.

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