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

December 18, 2025December 18, 2025 SANDRPLeave a comment

(Feature Image: Luhri-I HEP muck dump along Satluj river. Credit HNA, Aug 2024)

This annual overview highlights the critical issue of siltation in dams across India. Silt accumulation is defeating the very ‘multi-purposes’ for which they were built. While the reduced storage has been hampering dam-based water supplies, it is also leading to their fast filling up and untimely releases in monsoon season thus creating avoidable floods. It is in some case has also been resulting in plans to construct additional reservoirs and increase in dam height.

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Dam Safety · Hydro Disaster

2024: Climate Change, GLOF impact on Safety of Hydro, Dams in India

January 6, 2025January 11, 2025 SANDRPLeave a comment

(Powerhouse of a hydro project ravaged by cloudburst induced flashflood in Sutlej basin Shimla, Himachal Pradesh in Aug 2024. Image Source: Social Media)

This 2024 annual overview focusses on important reports highlighting the safety and sustainability issues of the hydro and dam projects in India in 2024 in the context of Climate Change, including Glacier melt and GLOFs. The compilation shows that the climate change driven extreme weather events have become significant threat for the structural safety of these projects.

This is even more relevant in inherently vulnerable areas like the Himalayas and Western Ghats from the point of view of seismic activity, young erosion prone mountain, flash floods, avalanches and landslides. Here the impact of climate change effects like more intensified hydrological cycles, cloud bursts, reduction in snow fall, glacier melts and GLOF (Glacier Lake Outburst Flood) increase the vulnerability including landslide dams and avalanche dams.

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Hydro Disaster

July 2024: USDMA Clueless on Flashflood Disaster at Vishnugad Pipalkoti HEP

July 18, 2024July 19, 2024 SANDRPLeave a comment

(Feature Image: Screenshot of social media video showing flash flood imapct at HCC’s batching plant during intervening night of July 15-16, 2024.)

The batching plant at the controversial under construction Vishnugad Pipalkoti Hydro Electric Power (HEP) project site in Uttarakhand has suffered significant damages due to a flash flood incident during the intervening night of July 15-16, 2024. The plant belongs to the Hindustan Construction Company (HCC) and has been set up by the Alaknanda river downstream the dam of 444 Mw HEP project adjacent to it dumping yard at Gulabkoti in Helang area of Joshimath tehsil in Chamoli district.

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Hydro Disaster

Himachal Pradesh: Damages at Luhri-I HEP Reveals Loopholes in Dam Safety Act

July 13, 2024July 14, 2024 SANDRPLeave a comment

(Feature Image: Screenshot of Local News India July 06, 2024 video report showing Luhri-I HEP tunnel outlet flooded after rise in Satluj water level.)

The controversial under construction Luhri Hydroelectric Project (HEP) Stage-I is being developed by Sutlej Jal Vidyut Nigam Limited (SJVNL) on Sutlej river near village Nirath village in Shimla and Kullu districts of Himachal Pradesh. The 210 MW HEP involves construction of an 80 m high concrete gravity dam with six bay gated spillways, a 567 m long horse shoe shaped diversion tunnel, two coffer dams, a surface power house, intake structure and penstocks among other parts.

The project would require 149.07 ha land including of 98.10 ha forest land and 50.97 ha private land. The project dam would create 6 km long reservoir area submerging 100.23 ha of land comprising of 63.52 ha of forest and 36.7 ha of private land. 39.47 ha of the submergence area is riverbed land.

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Cloud Burst

Uttarakhand: Cloud Bursts in SW Monsoon 2021

October 12, 2021July 13, 2022 SANDRP4 Comments

SANDRP has been compiling the extreme rainfall events termed as cloud bursts occurring during monsoon season in Himalayan states. This account brings out the status of such incidents in the state of Uttarakhand. We have already published details of at least 24 ‘cloud burst’[i] incidents in pre monsoon month of May 2021 in the state. In following parts, we would cover the other states in Western Himalaya.

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Hydropower

Judicial Interventions in Hydro Projects in India in 2020

March 9, 2021 SANDRP1 Comment

This report is about the interventions by various judicial bodies in India in the hydro power projects related issues in 2020. This also covers judicial decisions either delaying the justice or facilitating the projects thus unhelpful for the public interest cause and paving way for financially unviable and environmentally destructive projects. The account first looks at judicial interventions at the National level and then in states in North, North East and South Zones.

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Hydro Disaster

India Hydro Power Projects 2020: Violations, Accidents and Corruption

March 8, 2021March 8, 2021 SANDRP4 Comments

This highlights Disasters, accidents, corruptions and violations taking place in hydro power projects across India in 2020 mostly as reported by media.

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Char Dham Highway · Dams

Char Dham Highway Project: An overview

October 6, 2018October 7, 2018 SANDRP8 Comments

(Feature image Source Char Dham Road ProjectL Stairway to heaven or highway to hell by Siddharth Agarwal)

The Char Dham All Weather Road Project has been approved by National Green Tribunal (NGT) on September 26, 2018. The controversial project has evoked several environmental concerns right from the inception stage.

Almost more than one and half year into the unmindful implementation of the project, the risks and fears associated with the project are clearly visible throughout the construction route. In last few months, several independent reports have also raised serious concerns over the haphazard manner in which the project is being executed through sensitive hilly terrain. Continue reading “Char Dham Highway Project: An overview” →