Tag: Climate Change

2025: Silt accumulation in Indian Dams: Reducing entry of silt is the only viable option  
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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(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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DRP 151225: Hydro Projects continue to provide troubling news
Dams, Rivers & People

DRP 151225: Hydro Projects continue to provide troubling news

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(Feature Image: Ongoing work at Ratle HEP in June 2025. Source)

There are troubling news reports about a number of hydropower projects, even as the hydro industry tries its best to present a positive picture. NHPC tries to say that one of its 250 MW units at the Subansiri Lower HEP is good news. However, the fact that WII’s several years old recommendation that project should not be used for peaking power generation till studies about its impact on elephant corridor are complete. But the WII recommendation presented at the National Wildlife Board over 22 months ago is yet to be implemented. The serious financial trouble that the project is in, is also apparent from its desperate attempt to use the forest land as collateral, rejected by MoEF. The closing down of the NHPC office for the Subansisi Upper HEP in Upper Subansiri district came following agitation by the students Union and others there opposing the project.

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DRP 081225: India Needs Effective Measures to Check Sedimentation of Dams
Dams, Rivers & People

DRP 081225: India Needs Effective Measures to Check Sedimentation of Dams

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(Feature Image: Despite HC orders, NHAI, Railways continue illegal dumping of landslide debris. Source)

In a reply in Lok Sabha on Dec. 04, the Ministry of Jal Shakti has revealed that 24 reservoirs in Punjab (14), Himachal Pradesh (9) and Haryana (1) have collectively lost about one fifth of their storage capacity due to sedimentation. Indeed, for years the sedimentation has become a major problem reducing the storage capacity of dams across the country. As a solution the respective governments have mainly relied on desilting which has largely remained limited to plans and in some cases have not achieved the intended purpose. In case of Bhakra the central govt has again mainly focused on desilting as solution.

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2025: Dam Induced Urban Floods in India
Dam floods · Urban Flood · Urban Rivers

2025: Dam Induced Urban Floods in India

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(Feature Image: The Musi river in flood spate in Hyderabad on Sept 27, 2025 following incessant rains and the lifting of gates at the overflowing Osman Sagar and Himayatsagar reservoirs. Credit: Nagara Gopal )

In 2025, we could find reports on two Indian cities facing the impact of dam induced floods. While the excessive discharges by Himayat Sagar reservoir severely inundated residential areas along Musi river in Hyderabad in last week of Sept 2025, the significant releases by Ukai dam authority into Tapi river affected daily life in Surat city twice in mid Aug and first week of Sept. 2025.

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2025: Dam Induced Flood Incidents in India
Dam Induced Flood Disaster

2025: Dam Induced Flood Incidents in India

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(Feature Image: Locals assist in moving flood affected people to a safer place as floodwater enters villages in Ajnala, near Amritsar. Source)

India has witnessed several incidents of dam induced floods during south west monsoon 2025. The most remarkable and devastating episode unfolded in Punjab and Himachal Pradesh states in August 2025 largely due to mismanagement of Bhakra, Pong and Ranjit Sagar dams by BBMB. While negligence of BBMB has invited FIRs in Himachal Pradesh, warnings by Punjab govt and petition in NGT, there is no report in public domain suggesting the authority taking any credible action to make its dam operation scientific and accountable after the disaster.

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DRP 011225: Do we know how big is the GLOF threat in the Himalayan states?
Dams, Rivers & People

DRP 011225: Do we know how big is the GLOF threat in the Himalayan states?

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(Feature Image: Thousands of Glacial lakes dot the Himalayas. Source: NYT)

The following brilliant report on the threat of GLOFs (Glacial Lake Outburst Floods) is noteworthy from many perspectives. But possibly the most important one is to show the unknown but huge dimensions of the threat. Each of the thousands and thousands of glacial lakes in the Himalayas could pose such a threat. Alarmingly, no one can predict in most of these cases, when this threat will materialize, how big the floods it will bring and what will be the dimensions of the downstream impacts.

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DRP 241125: Judiciary’s ineffectiveness on Rivers Pollution issues
Dams, Rivers & People

DRP 241125: Judiciary’s ineffectiveness on Rivers Pollution issues

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(Feature Image: Luni river filled with untreated effluents from Balotra dyeing industries on Nov. 12, 2025. Source: Earth Warrior)

While there is no success story of water pollution control in India, where pollution control boards can claim credit for such success, the judiciary also has a significant role in ensuring pollution control in rivers and other water bodies. The state of rivers and other water bodies in India shows how ineffective has been the judiciary in India. Two cases from this week again provides an opportunity to correct this situation: one a suo moto case in the Supreme Court related to Rajasthan Rivers like Jojari, Bandi and Luni and another one in the Delhi High Court related to Yamuna river in the National Capital.

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WFD 2025: Important Studies, Reports on Freshwater Fish Species, Habitats
Fish, Fisheries, Fisherfolk

WFD 2025: Important Studies, Reports on Freshwater Fish Species, Habitats

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Marking World Fisheries Day (WFD) 2025, we present some of important studies and reports highlighting the growing threats over freshwater fish species in India and across the globe. The multi-taxon global freshwater fauna assessment for The IUCN Red List of Threatened Species published this year is among most concerning report revealing looming extinction threats over 24% of freshwater fauna worldwide. This includes the hump-backed mahseer, subterranean snakehead and peninsular hill trout found in rivers and waterbodies of Western Ghats.

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Himachal Pradesh: Sainj HEP Remains Out of Operation for over 4 months
Beas · Climate Change · Dams · Disasters · Himalayas · Hydro Disaster

Himachal Pradesh: Sainj HEP Remains Out of Operation for over 4 months

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(Feature Image: Outlet of Sainj HEP powerhouse tunnel buried under silt in last week of June 2025. Source: Hariram Chaudhary, Sainj)

The Sainj Hydroelectric Project (HEP) in Kullu district of Himachal Pradesh has been out of operation for over the past four months. The 100 Mw project of the Himachal Pradesh Power Corporation Limited (HPPCL) is the fourth HEP which was severely affected by flash flood in Jiwa nullah on June 25, 2025.

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DRP 101125: Does the world still need the annual jamboree of COP, given its record?
Climate Change · DRP News Bulletin

DRP 101125: Does the world still need the annual jamboree of COP, given its record?

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(Feature image is from the New York Times)

The annual Conference of Parties (COP) on climate change begins its annual meeting in Brazil today. Consider the track record of the annual meetings so far, it is a valid question to ask, as the Question of Cities asks, Does the World still need this meeting with such a huge carbon footprint of its own? Is it a futile exercise now?

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