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 Disaster · Dam Safety · Dams, Rivers & People

Kaleshwaram Project 2025: Inquiries Done, Actions Missing

December 17, 2025 SANDRPLeave a comment

(Feature Image: Wide crack in Medigadda (Lakshmi) barrage of Kaleshwaram. Credit: Nagara Gopal)

The year 2025 has seen revealing information on three inquiry reports highlighting how the Kalewshwaram project have become a massive failure on all fronts be it designing or implementing the dam project or even acting on probe reports. While govt seems to reverify liability of officials indicted in V&E report, it ended up seeking CBI investigation after tabling Ghose panel report in state assembly in Aug 2025. Similarly, the NDSA report is being followed only for fixing the damages while action against the responsible govt officials and private players is clearly missing.

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Dam Disaster

Feb. 2025: Srisailam Dam Left Bank Tunnel Collapse Disaster

December 14, 2025December 15, 2025 SANDRPLeave a comment

(Feature Image: A rescue worker at the SLBC tunnel. Credit: Nagara Gopal)

The SLCB tunnel collapse in Feb. 2025 is among worst dam-tunnel disaster this year in India. The incident occurred just four days after resuming tunneling work after a long halt killing at least 8 workers. Despite, two-month long multi agency search operation only two bodies were retrieved while mortals of six still remain buried inside the tunnel. The TBM involved in tunnelling has also been damaged. Given risky situation the rescue work was stopped in April end and there is no update on the same so far. Nearly 10 months after the disaster, there is no official report probing the reasons and addressing the concerns over inadequate geological, geotechnical inspections.

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Dam Safety

2025: Govts, Judiciary Actions on Dam Safety in India

December 13, 2025 SANDRPLeave a comment

(Feature Image: Experts visit Srisailam dam to assess its structural safety in May 2025. Source)

At national level, the NDSA has carried safety audit of 1853 large dams out of 6545 as of Nov. 25, 2025. In July 2025, the Central govt announced to reconstitute NCDS for a period of three years. Before this the NDSA in April 2025 organized a symposium on Dam Safety Act 2021. It has also released the updated version of National Register on Specified Dams 2025. At state level, the Tamil Nadu govt in July 2025 has planned to set up separate dam safety wing. The Punjab govt in May 2025 moved resolution in state assembly to annul Dam Safety Act and planned to enact its own dam safety bill.

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Dam Safety

2025: Dam Safety Issues in India

December 12, 2025December 12, 2025 SANDRPLeave a comment

(Feature Image: A worn out portion of Singur dam embankment. Source)

This annual overview presents top ten reports highlighting the dam safety issues in India. Worryingly, the central govt in Oct. 2025 itself has revealed that safety audit of about 5000 large dams is pending. Before this, the NHRC in Feb. 2025 sought a report on safety of the dams across the country. The plea rightly demanded a transparent, accountable and participatory dam safety mechanism to prevent disasters. Indeed, the aging infrastructure, inadequate maintenance, slow progress of rehabilitation and fast changing climate are among the key issues putting our dams under threats.

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Floods · Monsoon · Yamuna River

2025 South West Monsoon in Upper Yamuna Basin

November 12, 2025 SANDRPLeave a comment

(Feature Image: Screenshot of IMD River basin wise cumulative rainfall map dated 30.09.2025 showing the Yamuna basin)

This report presents monthly rainfall figures during South West (SW) monsoon season 2025 for 16 districts located in 4 states of Himachal Pradesh (3 districts), Uttarakhand (3 districts), Haryana (5 districts), Uttar Pradesh (5 districts) which forms parts of the upper Yamuna basin. The India Meteorological Département (IMD) has divided Delhi in 10 divisions which entirely comes in upper Yamuna basin and the report has rainfall figures for entire Delhi area.

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floodplains · Floods · Highest Flood Level · Yamuna River

Yamuna Flood 2025: Is River Carrying Capacity, Pattern Changing?

October 22, 2025 SANDRPLeave a comment

(Feature Image: Sept. 06, satellite image showing Yamuna flood spread downstream Delhi. Credit: Raj Bhagat P)

During South West Monsoon 2025, the Yamuna has witnessed one low, one medium and one high flood spells in its upper segment. On account of good rainfall in the catchment, the river also received significant flows for about one and half month from last week of July 2025 upto first week of Sept 2025. Due to this flood spells and flows the water quality in Delhi stretch of the river improved significantly, though temporarily.

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Dam floods · Monsoon · Yamuna River

Did Ichari, Vyasi Dams Influence Yamuna Floods in 2025?

October 20, 2025 SANDRP1 Comment

(Feature Image: Ichari (Koti) Dam on Tons river in Dehradun in empty condition in first week of Sept. 25)

In the South West Monsoon 2025, the Yamuna river witnessed 3 flood spells in a span of two weeks between Aug. 17 and Sep 1. In the first and medium scale flood spell, hourly discharges crossed 1 lakh cusecs for 12 hours on Aug 17 and 1,78,996 cusecs flood was recorded at 16 hour at Hathnikund Barrage (HKB), in Yamuna Nagar, Haryana.

In the second and low scale flood spell, river received above 50,000 cusecs discharges for 21 hours on Aug. 29 with the peak volume of 83,774 cusecs at 16 hour. In the final and first high scale flood spell, hourly water volume in the river crossed 1 lakh cusecs for about 129 hours beginning at 4.00 hour on Sep 1 till 12:00 hour on Sep 5, and 3,29,313 lakh cusecs was recorded as peak flood volume at 9:00 hour on Sep 1.

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Floods · Highest Flood Level · Monsoon · Rivers

Rivers in Extreme Floods During SW Monsoon 2025

October 4, 2025 SANDRPLeave a comment

This is the summary report of Highest Flood Levels (HFL) breach incidents which we could document from CWC’s flood monitoring website during South West Monsoon Season 2025. The monthly reports for HFL breach incident for July 2025, August 2025 and September 2025 can be seen by clicking the hyperlinks and the detailed final report can be seen here. SANDRP’s previous reports on the subject can be seen here: HFL breach incidents in 2018, 2019, 2020, 2021 (I), 2021 (II), 2022 (I), 2022 (II), 2023, and 2024.

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Highest Flood Level

Rivers Flowing in Extreme Floods in September 2025

October 1, 2025 SANDRPLeave a comment

(Feature Image: Yamuna river in severe flood at Mawi site in Kairana, UP on Sept. 02, 2025)

We have been able to observe river attaining new Highest Flood Level (HFL) at least at 18 flood monitoring sites of the Central Water Commission (CWC) in the last month of South West Monsoon 2025. These 18 sites are spread over 7 States & UT, including Jammu & Kashmir (6 sites), Maharashtra (4 sites), Uttar Pradesh (3 sites), Haryana (2 sites), Madhya Pradesh, Telangana and Karnataka (1 each site) comprising 5 river basins including Indus (6), Ganga (6), Krishna (3), Tapi (2) and Godavari (1).

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