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Subsurface dyke
A subsurface dyke is a barrier impermeable to water that is placed underground to control the groundwater flow in an aquifer, and to raise the water table.
==Introduction==
Although the total amount of water on Earth is generally assumed to have remained virtually constant, the rapid growth in population, together with the extension of irrigated agriculture and industrial development, are putting stress on the quality and quantity aspects of natural system. The sub-surface dyke〔http://www.cmsindia.org/cmsenviscentre/newsletter/enews/NewsLetter.asp?datefrom=21%2F05%2F2009&dateTo=21%2F05%2F2009〕 constructed at (Krishi Vigyan Kendra, Kannur ) at Panniyur near Taliparamba under Kerala Agricultural University with the support of ICAR as part of demonstrating rain water harvesting technologies has become a living example for an effective method for ground water conservation. The success story of the sub-surface dyke has demonstrated that it is one of the most feasible methods for the conservation and exploitation of the ground water resources of the state. The dyke is now the largest rainwater harvesting system in the region.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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