Dam Decommissioning · Dam Safety · Dams, Rivers & People

2025: Silt accumulation in Indian Dams: Reducing entry of silt is the only viable option  

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Dam Safety

2024 Dam Safety

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DRP News Bulletin

DRP NB 14×24: Big Dams, Long distance water will not solve Urban Water Crisis

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Dam Decommissioning

Dam Removal as a River Restoration Tool: World Fisheries Congress 2024

The recently concluded World Fisheries Congress in Seattle in March 2024[i] discussed several themes relating to the health of our rivers, dependent communities and fish. Of the several interesting sessions, Symposium on ‘Dam Removal as a River Restoration Tool at the Water-Energy-Food Nexus’[ii] was of particular interest.  I was simultaneously at two parallel sessions and was unable to attend some of the presentations but have tried to provide an overview of the Symposium, including a talk by SANDRP.

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Dam Safety

2023: Safety & Sustainability Concerns On Dams & Hydro Power Projects in India

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Dam Decommissioning · Dam Safety

भारत में बांध हटाने की नीति व कार्यक्रम की आवश्यकता

(Feature Image: NDRF rescue work at damaged Tapovan Vishnugad HEP Dam in Chamoli, Uttarakhand in Feb. 2021. Image PTI/ Source: The Tribune)

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decommissioning

Dams Decommissioning going up globally

All large dams have finite life. What happens to the dams once the useful life of a dam is over? It would need to be decommissioned. Decommissioning of a dam generally refers to[i] complete removal of the dam and its associated structures. This is a very relevant question for India as the third largest dam builder of the world. It becomes even more important as large dams are no longer required or are no longer viable and importance of a flowing river is increasingly appreciated. It needs to be kept in mind that a dam cannot be allowed to remain on the river, without proper maintenance, as such a dam would remain a huge safety hazard for society and economy downstream from the dam.

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DRP News Bulletin

DRP NB 25 Jan. 2021: UN warns about aging Dams & Floods in changing climate

A new UN report released on January 21, 2021 UN has warned the major big dam owning counties about the aging population of fast silting up dams in changing climate and urgent need to start working on decommissioning of uneconomical large dams. Among the few countries that UN has warned includes India with its third largest number of big dams. The added problem in India is the ill maintained and ill operated large dams that UN report did not look into. Indian dams are sanctioned based on highly under estimated siltation rates, there is practically no transparency and accountability in operation of Indian dams and dam almost every year get away with creating avoidable flood disasters. This latest problem is not just related to old dams, but even the newest celebrated ones like the Sardar Sarovar Dam as happened in Gujarat in late August-early Sept 2020. No legal regime exists in India for dam safety, either structural safety or operational safety. And in changing climate, with increasing frequency of higher intensity rainfall events, such risks are already increasing multi-fold.

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Dams

Why are we still building Large Dams?

Analysis of official information shows that Big dams are not longer necessary or viable or optimal in India. Most (over 95% of India’s 5701 large dams (5264 completed and 437 under construction as per CWC’s National Register of Large Dams[i]) are built for irrigation, but most of our irrigation now comes from groundwater. In fact, about 90% of additional irrigation in last four decades has come from groundwater.

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Dams · DRP News Bulletin

DRP News Bulletin 3 Sept 2018: CHINA HAS STARTED DECOMMISSIONING DAMS

In a mountain village in southwest China’s Sichuan province, authorities have demolished seven small dam projects this year along a river to clear illegal developments in a new nature reserve. The demolition is part of a nationwide programme to close hundreds of tiny and often ramshackle dams and turbines and bring order to China’s massive hydropower sector after years of unconstrained construction.

The dams sat on an unnamed tributary of the fierce and flood-prone Dadu river, which feeds into the Yangtze, Asia’s largest and longest river, where the government says the “irregular development” of thousands of small hydropower projects has wrecked the ecology. But green groups say the campaign will not necessarily save the environment because it will not affect big state hydropower stations, which they say have caused the most damage.

On the 48 km Zhougong, authorities have already demolished small projects built in nature reserves or encroaching upon new “ecological red lines” drawn up to shield a quarter of China’s territory from development.

The government says small dams have disrupted the habitats and breeding patterns of many rare species of fish, although green groups argue the damage wrought by bigger dams is more severe, with entire towns and ecosystems submerged in water, which they say increases the risk of earthquakes, landslides and even climate change.

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