Dam rehabilitation technologies

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Discuss the impacts from technologies that could be employed to rehabilitate the more than 243 dams in India.

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  1. Hi, few of the major known problems @DAM are  1) Reduction in Holding capacity due to sludge depositions 2) GHG emissions. We have one solution to address both the solution - with Eco-dredging (no physical dredging required) all the sludge gets consumed within the aqua ecology no requirement of physical excavation. 2) the water quality becomes better reversing the GHG emissions. Please contact us for any further details  - contact@wsafess.com   

  3. NEW CONCEPTS AND TECHNOLOGY FOR DAMS REHABILITATION Seasonal (dry season during a year)) and long duration (1 till 3 dry years) Droughts is real situation which will more and more happens, worldwide, within the climate change conditions. Man con not change the world climate, He has to coop with and to find solution to avoid the negative consequences on the yields and crops. In the opposite, during some years, there are also more and more exceptional heavy rains generating catastrophic floods. The different sized dams are conceived to retain the rain water coming from their watersheds. This retention water is mostly used for irrigation and in certain conditions for hydropower. During the dry years the dams are not completely filled this generates often water scarcity and drought conditions especially for agriculture use. During the exceptional rains, the water flowing in their watersheds represents several times their retention capacities; this generates floods and lost of huge of water volumes (millions and billions of cubic meters) in the seas, oceans or salt lakes. For the rehabilitation of different sized dams, Chahtech SA has developed and tested 2 news concepts: the “anticipated irrigation” and the “water injection in the deep soil layers”. Both new concepts are based on the use of “the buried diffuser” invented, manufactured and worldwide distributed by this company (www.chahtech.com). The goal of the “anticipated irrigation” is how to save and conserve the huge of water received during the wet season, for the next dry season. This means: instead of irrigation during the hot or the dry season, the irrigation using buried diffusers is done during the autumn and winter or during the rainy season. The amount of water of the «anticipated irrigation» should cover the total need of the crop during the hot or dry season (spring and summer). This water amount is stored in the deep soil layers will be used by the deep or sob surface roots systems of the crops. The goal of the “water injection in the deep soil layers” is how to save and conserve the huge of water received during the wet or rainy years to be used during the long dry period: one till 3 years? This is useful especially for trees crops. The injected water comes from: dams, rivers, and springs. The amount of the injected water could cover the need of the trees for several years (3years) when the soil below 60cm is thick (1 meter or more). This injected water is conserved in the deep soil layers (60 cm below the soil surface) and used later by the deep root systems of the trees during a long drought period: six months till 3 years. During the Drought the trees produce normally using the injected water. Actually, the 2 news concepts are in the way to be transferred in India. For more information in India, contact Mr Anam Saeed (email: anamsaeed65@gmail.com Mobile phone: 09758768424) or Dr CHAHBANI Bellachheb (email: bchahbani@chahtech.com Mobile phone: +21698254383).