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Volume :40 Issue : 152 2014      Add To Cart                                                                    Download

Technique Of Water Harvesting And Its Role in the Rehabilitation Of Degraded Playa (Case Study Liyah Area- Kuwait)

Auther : Modi M. Ahmed - Dr. Ali M. AL-Dousari

     The main problems facing sustainable development in Kuwait are the acute shortage of water resources. Rainfall in Kuwait is scarce and irregular (annual average 110mm) which could eventually lead to severe shortages in the water supply for both surface and groundwater. In order to control the rapid expansion of desert areas, water-harvesting techniques should be implemented. Water-harvesting involves the collection of runoff for productive use. It was applied in artificial (1)playa (100 m2) formed after dumping gravel quarries in Kuwait in December 2003. The main water harvesting techniques used are semicircular bunds. These bunds develop when the soil mixes with organic waste material, especially plant residues. Inside selected bunds, native plants such as Lycium shawii are planted. The most environmentally effective mulching techniques for each bund are used and regularly monitored. Representative physical and chemical soil tests were carried out before and after treatment to determine the efficiency of the water-harvesting system. The results showed an enhancement in the physical soil properties after application of water harvesting techniques. The average infiltration capacity has increased from to 107.2 cm3/min in un-treated soil to 193.5 cm3/min in the treated soil in comparison with non-treated. The average differences in volume of infiltrated water was 71%. The average soil moisture before treatment was 1.5% which increased to 3.5% after treatment. Before treatment, the dominant bulk density of the soil was 2.7 gm/cm3. But after the treatment it was reduced to 2 gm/cm3. The penetration force before treatment was 273 psi, but after treatment it was reduced to 190 psi. This study recommends expanding the use of these techniques, more specially the semicircular bunds taking in consideration improving these techniques to suite the environmental condition of the area with more emphasis on the mobile sand problem.

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Oct 31, 2021

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