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Chitale Committee recommends measures for desiltation of river Ganga

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New Delhi | Friday, May 19 2017 IST
 
The Chitale Committee on Desiltation of Ganga has recommended a slew of measures including study of reach-wise sediment transport processes along with establishing annual sediment budgets to guide desilting activities and entrusting a technical institute to conduct sediment budget, morphological and flood routing studies that would examine and confirm the necessity of the de-silting of the reach under consideration.The committee was constituted in July 2016 by the Ministry of Water Resources River Development and Ganga Rejuvenation under the chairmanship of Madhav Chitale.It was formed to prepare guidelines for desiltation of Ganga from Bhimgauda in Uttarakhand to Farakka in West Bengal.According to a statement, the committee was asked to establish difference between desilting and sand mining and also establish need for desilting for ecology and e-flow of the Ganga.The committee in its report said erosion, sediment transport and siltation were very complex phenomena. It was impossible to apply a "one-size-fits-all" approach to sediment management and control, because the issues involved were frequently regional specific.Local factors such as topography, river control structures, soil and water conservation measures, tree cover, and riparian land-use or land disturbance could have a large impact on sediment loads in rivers.River control structures such as reservoirs, soil conservation measures and sediment control programmes could cause downstream sediment loads to decrease, while factors like land disturbance could cause increased sediment loads.At the same time, indiscriminate de-siltation works might result into more harm to ecology and environment flow. There was a need to evolve guidelines, better broad principles, which should be kept in mind while planning and implementing de-silting works.The report also said that erosion, sediment transport and siltation in large rivers like Ganga were very complex phenomena and their estimation had inherent limitations and uncertainties.A reconnaissance of main river Ganga on Google earth map revealed that different reaches were in a dynamic equilibrium phase.Sedimentation was mainly seen downstream of Bhimgauda barrage and near the confluences of tributary rivers with Ganga. More UNI RBE SNU 2314

-- (UNI) -- C-1-1-DL0098-901065.Xml

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