“When Jahlma Nallah starts roaring, we cannot sleep. It has been flooding for the past three years at least” said octogenarian Devi Singhji in October 2024. Jahlma Nallah, which joins the Chenab and blocks it occasionally, flooded again catastrophically in the monsoon of 2025.
Continue reading “Vulnerable Nallahs in the Himalayas Need Urgent Attention”Category: Floods
2025 Western Himalayan Floods: What can be done to reduce disastrous impacts?
Scary visuals and messages on social media as also some of the pronouncements of the Supreme Court about Himachal Pradesh have shown that Western. Himalayan states have faced multiple flood disasters in the ongoing SW Monsoon 2025. Landscape of Himalayas is known to be vulnerable to landslides, mudslips, cloudbursts, flash-floods, GLOFs, erosion, seismicity and floods. While some floods are inevitable in the kind of climate prevailing here, how they become disasters is linked to the way we have treated the landscape, environment, regulations, people and floods.
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DRP 250825: Threat of Dam Floods continue to be ignored
(Feature Image: The release of water from Pong Dam has brought devastation to Mand Bhograwan village in Kangra district, where the sudden rise in the Beas river has submerged several acres of fertile land and put houses at risk. Aug 17.)
Sudden release of large quantity of water from the dams has the potential of creating avoidable floods in the downstream areas as we could see last week in case of Ukai Dam water releases affecting Surat in South Gujarat, Ujani and Jayakwadi dam water releases in Maharashtra, Bhakra and Pong dam releases in Punjab and Himachal Pradesh, among others. In all these cases, we can show that earlier water release was warranted based on available information, considering the carrying capacity of the downstream river, but such action was delayed till either the dam was full before water started (e.g. Ujani and Jayakwadi) or too large water releases created avoidable flood impacts in case of Ukai Dam on Tapi River in South Gujarat and also in case of Bhakra and Pong dams. There were also extensive damages in Mirzapur and Chandauli districts of Uttar Pradesh due to sudden release of water from a number of dams including Chandra Prabha Dam, Ahraura dam and Jargo Dam among others.
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Aug 2025: Flood Affects Satpuli Barrage Project in Uttarakhand
(Feature Image: Flooded machines, camps and materials of Satpuli lake project on Aug 06 morning. Credit: Chain Singh Rawat (Junyali), Satpuli)
A flood spell in Nayar river (East) on Aug 6, 2025 morning has affected the ongoing construction work of Satpuli Barrage Project in Pauri district of Uttarakhand. The flood submerged some machines, heavy vehicles, worker camps and huge amount of construction materials, leading to huge losses for the construction company. All these machines, materials and camps were in the riverbed and flood zone of the river, exposing them to flood threats in the peak monsoon.
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Dharali Disaster: Bhagirathi River Blockage Partially Removed
(Feature Image: Formation of artificial lake in Bhagirathi river at Harshil, Uttarkashi)
After 11 days since the Dharali disaster unfolded in Bhagirathi valley Uttarakhand on August 5, 2025, an artificial lake formed on Bhagirathi river has been removed to some extent by the joint team of concerned departments on Aug 16, 2025 noon. The lake was formed after the Tel gaad partially blocked the Bhagirathi river at Harshil about 2.5 km downstream of Dharali.
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Devastation at Chasoti: Underlining the vulnerability of Chenab Basin again
Last October, we were about 15 kms from Chasoti in the Paddar valley of Jammu when we met Dular Singh jee, Priest of Machail Mata Temple, accompanied by other members of the Temple Management Board. They were on their way to Mindhal Mata Temple also on the banks of Chenab in the neighboring Pangi Valley. Theirs was a journey upstream and ours was downstream. We talked of Chenab, floods, Mindhal and Machail Mata Yatra (pilgrimage) and beautifully carved wooden temples of this region.
And today, Dular Singh jee, who is just 3kms from Chasoti, tells me in voice choked with emotion, “I have not seen such a catastrophic flashflood in my life.” The flood that started around 12 noon on Aug 14 2025, devastating Machail Mata yatra and pilgrims at Chasoti. “Mata Rani sabki raksha kare”. (May the deity protect all). He is also worried about villages like “Hangu, Hanoti, Hamori and Bhajanu Nalla”.
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Aug 2025: Five Road Workers Missing After Flashfloods in Pauri-Uttarakhand
(Feature Image: Search Operation on Aug 07, 2025 in Katola gaad of Bankura village in Chauthan Patti, Thaisain, Pauri. Source: Uttarakhand Police)
The Chauthan Patti under Thailisain block of Pauri Garhwal district in Uttarakhand has again been battered by excessive rainfall events on August 06 2025. Villagers have reported of 3 incidents of ‘cloudburst’ induced flashflood causing severe damages in Bankura, Mansari and Sarson villages.
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Rivers Crossing the Highest Flood Levels in July 2025
(Feature Image: Hydrograph of Pin river at Gulling site in Lahul & Spiti on July 04, 2025)
In July 2025 during the South West Monsoon, we have found rivers crossing their respective Highest Flood Levels (HFL) at least at 12 flood monitoring sites of Central Water Commission (CWC). Of the 12 sites, 11 are in Ganga basin and 1 site is in Narmada basin. The details of all these sites are given in table below. The sixth column of the table is the information about rise in meter (m) over the old HFL, duration (hours-hrs) the river has stayed in extreme floods and number of years (yrs) after the HFL is breached. The 12 sites are spread over 5 states: Madhya Pradesh, Uttar Pradesh, Bihar, Uttarakhand and Jharkhand.
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DRP 210725: Moving Joshimath Landslide a threat to Tapovan Vishnugad HEP in UKD?
(Feature Image: Hydropower Tunnel project shown in the Joshimath area along with the Watershed Boundary. This figure is generated using ArcGIS software-version 10.3.1 and CorelDraw Graphics Suite 2019 https://www.coreldraw.com/. Source: Analyzing Joshimath’s sinking: causes, consequences, and future prospects with remote sensing techniques. May 2024)
A paper in scientific journal co-authored by Internationally renowned landslide expert Dave Petley (published on June 16 2025 at: https://doi.org/10.1016/j.enggeo.2025.108201) warns that the Joshimath landslide is moving and can threaten the under construction Tapovan Vishnugad hydropower project in Chamoli district in Uttarkhand. The paper says: “The 2023 rapid deformation at Joshimath was preceded by slow movement years ahead. Deforestation in the Joshimath region might have intensified the slope instability. Additional landslide zones were detected in Hailang, Kalpeshwar with similar pattern. Slow-moving landslides have high potential to cause often underestimated damages.”
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Letter: Encroachment of Yamuna floodplain near Wazirabad Barrage
To, July 17, 2025
1 Shri Vinai Kumar Saxena
Honorable LG, Delhi Civil Lines,
New Delhi-110054
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SANDRP 