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EIA reports of dams all too often make fraudulent claims. In Himalayan rivers, hydropower development is wreaking havoc with fisheries. In the Teesta basin, access to the river for fisheries has been severed by bumper-to-bumper dam development. Today consultancies with developers are commonplace. Located in the same state as Farakka Barrage, a textbook example of dam-led fisheries collapse, CIFRI never pushed for a functioning fish-lock for Farakka.
Its e-flows Assessment for the MW Nyamjanchhu river was severely flawed and used a canal-like cross-section for the river. E-flows are recommended to be released through dam-toe powerhouses, which are as fishfriendly as a sharp chopper.
High flows from hydroprojects during peaking operations wash away eggs, fry and juveniles. The only official solution to salvage the fisheries collapse seems to be in dubious hatcheries, reservoir fisheries and aquaculture. However, farmed fish affect biodiversity, the gene pool, and completely alter the equity around riverine fisheries. In the U. Dams on the Klamath river are to be decommissioned mainly for their impacts on salmon runs, traditionally important for indigenous tribes.
I think of the fisherfolk I met throughout the country, still singing songs of the fish that no longer swim up their rivers, fish that are blocked by dam walls, fish that find no water to return to. Will they be able to wait any longer? Analysis of official information shows that big dams are no longer necessary, viable or optimal in India. The best option for sustaining groundwater is to harvest rain closest to where it falls and either store it locally or, wherever feasible, recharge groundwater.
Respecting the groundwater aquifer is the most benign water storage option, though there are others too, including local water storage and even labour-intensive soil moisture conservation works that could employ millions of people across India. An old man on Khalghat Bridge over the Narmada, which has seen several iconic struggles against dams. Many sections of Khalghat are now submerged.
The nature capital losses were never estimated. Photo: Abhay Kanvinde. Hydropower was never socially or environmentally the best option; it is clear now that it is no longer economically viable either. The cost of power from any under construction or new proposed hydropower project unlikely to be less than six to seven rupees per unit KWHr whereas solar and wind can deliver at less than three rupees per unit.
Carefully located, these alternatives do not lead to the kind of severe social and environmental impacts that hydropower projects do. Moreover, these alternatives have lower investment requirements, and can be constructed faster and closer to the load centres. Clinchingly, the most crucial evidence of the financial unviability of dams is the large-scale exodus of private companies from the hydropower sector.
The decreasing addition of hydro installed capacity over the last decade is further evidence that hydro dams are coming closer to redundancy. The peaking power advantage that hydropower projects claim has not been convincing.
No agency has definitively monitored how much power is generated from hydro projects during peaking hours, when electricity use is at its highest points in a day. Thus the question of optimising it does not arise. Today, with the huge reduction in electricity storage costs, there are better and more economic options for providing peaking power. Very few dams are constructed exclusively for water supply or flood control. When it comes to the latter, existing dams can provide flood moderation benefits provided they are operated with that objective.
In reality, the conflicting-purpose operation of dams has increasingly been the cause of dam-induced flood disasters, as we saw in Kerala in August and in the Krishna basin in Maharashtra and Karnataka in August In that case, why are we still building dams and irrigation projects? The not surprising answer recently came from a man who should know. All the states have sizeable budgets for this.
After all that, the total canal irrigated area in the country is per cent. Zomato Ltd. Market Watch. ET NOW. Brand Solutions. Video series featuring innovators. ET Financial Inclusion Summit. Malaria Mukt Bharat. Wealth Wise Series How they can help in wealth creation. Honouring Exemplary Boards. Deep Dive Into Cryptocurrency. ET Markets Conclave — Cryptocurrency. Reshape Tomorrow Tomorrow is different. Let's reshape it today. Corning Gorilla Glass TougherTogether. ET India Inc.
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