On August 25-27, 2021 the most of hilly districts in Uttarakhand witnessed intense rainfall events causing widespread destruction. Media reports and local people suggest at least seven cloud burst incidents occurring in quick succession over Binhar range in Pacchawadoon and Mussoorie hills dividing Ganga and Yamuna basins in Dehradun district. The resultant deluge has also affected the under construction Vyasi Hydro Electric Project (HEP) areas in Vikas Nagar tehsil highlighting that the project is unprepared to cope with existing & emerging disasters.Continue reading “Uttarakhand: Cloud Bursts around Vyasi HEP“
During the night of June 20, 2020 pre-monsoon showers left series of gully formations on one of the muck dump sites of the under construction 120 MW Vyasi Hydro Electric Project (HEP) in Hathiyari area of Vikas Nagar tehsil, Dehradun district in Uttarakhand. Huge amount of muck washed down into Yamuna River, exposing the credibility of the Uttarakhand Jal Vidyut Nigam Ltd. (UJVNL), the developer of Vyasi HEP.
Local people said that since June 2019, the UJVNL has spent over Rs. 40 lakh on geo jute and hydro seeding (grass slope protection) work at Hathiyari muck dumping yard. The project has already missed several deadlines, the work is far from complete. The careless handling of muck generated during the construction of 2.7 km long, 7-m dia tunnel in last eight years has added -+to the woes of local people and Yamuna river.
The release of around 1.31 lakh cusecs of water in Yamuna from Hathnikund barrage at 09:00 hours on July 26, 2018, was certainly first surge of flood this monsoon in the river. But no one expected, most are still in the dark that the release would multiply by over five times in just two days! It is almost a month after the Southwest monsoon arrived. By this time the river usually floods couples of times.
Looking at the lack of significant rainfall in the catchment area over past weeks, the flood is unexpected and has taken many by surprise. The Irrigation and Flood Control Department, Delhi Government has issued warning for flood plain farmers and human settlements close to river banks, but the warning does not seem to commensurate with the flood peak that is likely to hit the capital in next day or two.
Yamuna has already crossed warning (204 m) and danger level (204.83) at Old Delhi Railway Bridge (ORB), Delhi. The High Flood Level is 207.49 meters, reached on Sept 6,1978 after around 7 lakh cusecs (cubic feet per second) water was released in Yamuna on 3rd Sept 1978 at 04:00 hrs from Tajewala barrage, that was decommissioned and replaced by Hathnikund barrage in early 1990s. The flood monitoring of River Yamuna began in 1963.
Since then, the river has seen high floods in 1988, 1995, 2010 and 2013. The 2010 and 2013 floods also crossed 207 metres mark but fell short of 1978 level.