Name of wetland : Coimbatore Big Lake ( Coimbatore Periya Kulam )
Location: Coimbatore big lake is situated near to Ukkadam bus-stand. This tank is located north of the River Noyyal.
Latitude: 10° 59'06" N and Longitude: 76° 56'58" E
Size of wetland
Catchment area: 10.752 Sq.miles
Water Spread area – 1.295 Sq.km
Length of the Bund – 2880.00 M
Length of Surplus escape – 15.40 M
No. of Sluices – 4
FTL – 5.82
MWL – 6.51
TBL – 7.88
Max. Flood discharge – 62.88 cu.secs
Sill of Sluice – 10.64
Capacity – 69.95 M.cft
Ayacut – 1425.00 Acres
Depth – 19.10 Feet
Taluk – Coimbatore South
Village – Coimbatore
Inlet and outlets: The lake is being fed by Coimbatore anicut channel from the Coimbatore anicut on Noyyal River. The lake also receives surplus water from the Selvachinthamani lake located in the upstream (north-west).
The lake is provided with the outlet connection to feed the Valankulam lake, which is located east side of the lake. It has surplus weir arrangement of about 25.8 m situated south side of the lake, which is a masonry weir with side walls and solid apron.
No of Inlets – 7 (1 from River Noyyal, 1 from Selvachintamani and 5 sewage inlets)
No of Outlets – 5 (1 Weir and 4 sluice)
Encroachments – Yes
This tank has huge encroachment on the boundary area. One big taxi stand is being operated on the tank bund in north-eastern corner. Farmers cultivate green leafy vegetables with the drainage water inside the water spread area. All kinds of wastes are dumped on the tank bund and near the tanks. There are 300 pucca/thatched houses located at the toe of the bund on southern side of the tank. The approximate area under the encroachment is around 10 acres. (Source: PWD/WRO, Bhavanisagar dam division, Irrigation sub division, Coimbatore)
Agriculture – No
Fishing – Yes
Fishing is carried out by fishermen societies. All common fresh water fishes are reared in polluted waste water infected with heavy metals and pathogenic bacteria. This activity needs to be banned.