latest issue of dam engineering (Volume XXXII, Issue 2) has been published.
Investigation of Overburden due to Rock Fall near Nathpa Dam and Bhabha Tail Race Diversion Tunnel Pump House – A Case Study
Rizwan Anwar, PN Ojha, Arup Ghatak, Brijesh Singh and VP Chatterjee
summary: This paper is based on the stability of rocks to determine the possible cause and extent of the rocks falling on an approaching road at about 1200 m along the right bank of Sutlej River at Nathpa Dam and Bhaba TRT/Pump House (BRTPH) in India. highlights a study. , Due to the approach to the dam site on the coast and the area prone to rock fall, there is significant danger to life, machinery and civil structures. The area is vulnerable to rock fall as the steep rock slopes on the river bank are rising about 300-350 m above the project road. ±1500m The affected rock mass in this Himalayan belt is highly metamorphosed, and highly foliated, with many joints and fractured planes both continuous and discontinuous in nature. In the present study, 1.2 km. Stone pelting is continuing in the area and is likely to occur on both sides of the dam body as well. If this is not controlled, it can have serious consequences on the operation of the dam. This paper also discusses proven and suitable technology recommendations for stabilizing overburden due to rockfall. Depending on the hazard rating, and adopting suitable stabilization measures in each section, stabilization methods such as rock bolting, rock anchoring and suitable stainless steel caging techniques are recommended to prevent rock fall occurrence. It has been suggested that rehabilitation work of rock strata should be done section wise for strengthening and stabilization measures.
Mekong Dam Monitor: Providing a picture of the impact of dams on the Mekong River
summary: Mekong Dam Monitor data reveals upstream dams’ impacts and points to ways transboundary cooperation can improve downstream outcomes in times of drought and crisis. Brian Eyler, Alan Bassist, Regan Cowan, Courtney Weatherby and Claude Williams provide more details.
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