Publications

162

Bulletin 162

Environmental Fluid Mechanics
178

Bulletin 178

Operation of Hydraulic Structures of Dams
180

Bulletin 180

Dam Surveillance - Lessons learnt from case histories
27th

27th Congress

Marseille June 2022
World Register of Dams / Registre Mondial des Barrages

World Register of Dams / Registre Mondial des Barrages

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Position Paper

Position Paper

Position Paper - Dam Safety and Earthquakes

Events

7thMeeting of the EWG

International Symposium on Dams and Earthquakes

Athens, Greece

12 - 13 September 2024

 

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ICOLD 2024

92nd Annual Meeting & Int'l Symposium

New Delhi, India

27 Sept. - 3 Oct. 2024

 

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Hydro2024-logo

HYDRO 2024 Secure technology for turbulent times

Messe Congress Graz (MCG), Austria

18 to 20 November 2024

 

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ICOLD Event

17th ICOLD International Benchmark Workshop on Numerical Analysis of Dams

Sofia, Bulgaria

9th - 12th April 2025

 

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28th ICOLD Congress & 93rd Annual Meeting

Chengdu, China

10 May to 23rd May 2025

 

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Tehri dam held raging Ganga and saved lives, July 23rd

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India: Tehri dam held raging Ganga and saved lives

 

Heavy floods affected Uttarakhand in India, at the border with Tibet and Nepal, during last month of June. The water inflow from Bhagirathi and its tributaries reached about 7,000 cubic meters per second. If that flow had gone uninterrupted, it would have caused extreme consequences. In the city of Rishikesh, the Ganga would have been flowing 5 meters above the danger level.

But that water inflow was stopped, thanks to the Tehri dam, which stored most of the supplementary water. As a result, the water inflow was reduced to a mere 500 cubic meters per second and the cities downstream (Rishikesh and Haridwar) were protected. An official from Tehri Dam authority explained that, while most power projects in Uttarakhand had stopped generation due to heavy silt depositing in the turbines, the Tehri and Koteshwar dams continued to generate power (respectively 1000 and 400 MW) as usual because they are reservoir storage projects.

A report quoted in the Times of India said the fury of nature in Uttarakhand was such that waters rose as high as a four-storeyed building at Devprayag, where the Alaknanda and Bhagirathi meet, in a 24-hour period after the June 16-17 cloudburst. This rise was unprecedented and could have resulted in total destruction of Rishikesh town and much of Haridwar if the flow of Bhagirathi was not contained by the Tehri reservoir, according to officials of the Tehri Hydro Development Corporation (THD). Rishikesh is famous for its ashrams, which would have been all wiped out.


In Germany, similarly in June, a recently upgraded Sylvenstein dam has protected the city of Munich. An officiel from the Land of Bavaria, Tobias Lang, commented : "The benefit of this reservoir has been enormous. the investment in upgrading measures have more than paid off during major flood events of 1999, 2005 and 2013. It's not easy to find a structure designed to provide protection against natural disasters which has provided such a quick return on investment."

 

 

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