Chennai Dams – All the lakes are at full level and even the newly built Thervoy Kandigai dam has reached full level. It is one of the best year for Chennai. The three big lakes (Puzhal, Chembarabakkam, Poondi) over flowed for 1st time since 2015. There will be no water problem for Chennai for next 1 year and water is being supplied to Chennai City at peak 830 mld per day. There is a quota from Krishna water left too.
One interesting stats with respect to Chennai lakes
1995 drought and at end of term at 1996 all lakes are filled up brim
2003-2004 drought and just at end of term at 2005 all lakes are filled up brim
2012-2014 less rains and just at end of term at 2015 all lakes are filled up to brim
2017-2019 massive drought and just at end of term at 2020 all lakes are filled up to brim
Mettur Dam – The biggest Dam in Tamil Nadu. Good storage in Mettur Dam for 3rd year in row. Lot of water has been released from Mettur for irrigation. Still it is 80% full in January.
Bhavanisagar Dam – The 2nd biggest dam in Tamil Nadu continues to have good storage than 80% storage for over 5 months now
Coimbatore Dams – Most of the Dams catchment areas get rains in South West Monsoon and even in December they have good storage than normal years. Parambikulam the biggest is close to full level for over 4 months now with about 90% storage. Aliyar is also close to 95% full. Sholayar meanwhile is used for hydro electric power.
Nilgiris Dams – Nilgiris dam catchment areas gets rains mostly in South West Monsoon, so there is some fall in storage as the water is used for electricity generation.
Kanyakumari Dams – The two big dams Pechiparai and Perunchani are still 94% and 81% full. The third biggest dam in Kanyakumari which is Kodayar is 100% full while Chittar I and II both are over 70% full.
Tirunelveli Dams – Both Papanasam and Manimuthar overflowed with historic rains in January and almost all dams are full. Even the vadakku pachayar which has very small catchment and remains at dead level is at 100% level.
Theni Dams – Periyar Dam after January rains got good inflows and is 70% full in January and this itself shows how good rains were meanwhile Vaigai is close to 100%. So overall great year for Madurai.
Tiruvannamalai Dams – Krishnagiri dam is full and water is letout. eventhough it is not a great year for upstream Sathanur has 76% water.
Overall across Tamil Nadu the dam levels are so great even in South West Monsoon Catchment area dams. That too in the end of January.
Whatever dam data, i could get data i have compiled it with minimum cut-off size at 400 mcft.