The Noyyal River is a well-known river in Western Tamil Nadu, and a tributary of Kaveri River. It rises from the Vellingiri hills in the Western Ghats in Tamil Nadu, very close to Kerala border, and flows through many villages and the cities of Coimbatore, and Tirupur finally draining into the Kaveri River at Noyyal, a village in Karur district named after the river itself. The river’s basin is 180 km (110 mi) long and 25 km (16 mi) wide and covers a total area of 3,500 Sq.km (1,400 sq mi). Cultivated land in the basin amounts to 1,800 km2 (690 sq mi) while the population density is 120 people per km² (311/mi²) in the countryside, and 1000 people per km² (2590/mi²) in the cities. The area is known for its scanty rainfall and the development of the Noyyal River Tanks System to hold any overflow from the rains plus the water of the Northeast and Southwest monsoon season was ecologically important. The 173 km (107 mi) long tributary of the Kaveri River filled 32 tanks. These interconnecting tanks held the water flowing from the Noyyal.

The township of Coimbatore once was surrounded by the Noyyal river and its canals, tanks, and rivulets. The Noyyal river and its interconnected tank and canal system, believed to have been originally built by the Chalukya Cholas kings, was then an efficient system that provided water transport, storage, and maintained stable groundwater levels. Surplus water from the Noyyal river spilled into the canals and were channeled to the tanks, preventing unwanted flooding. The tanks were a major factor in replenishing the ground water through percolation of the subsoil water. As urbanisation grew, the system was neglected and the number of functional tanks was drastically reduced until only eleven were left. Today the system no longer works and water is scarce. Agriculture has significantly decreased. Lacking irrigation water, lakhs of Coconut trees in the area have dried up

The “Noyyal” is a sacred river in Tamil history. Its original name was Kanchinadi but changed later to the name of the place where it drains into the Kaveri River in 1750 A.D.

The Noyyal village is situated at the banks of Noyyal and Kaveri (Ponni) Rivers where they both merge. An ancient temple to the goddess Sellandiyamman is also situated at Sangamam.

According to the locals, during 1960’s and 1970’s the river used to bring water almost 9 to 10 months of the year. The water used to be clear. The water was used directly for drinking without filtering. The water was used for agriculture and people cultivated for their needs and looked green. The adjacent areas of the river used to get water almost throughout the year and water level in wells were just 40–50 feet below the ground.

list of lakes

Hydraulic Particulars:

Capacity (in M.C.Ft.): 30.51 

Ayacut in acres: 486  

Depth of storage in feet: 13.6 

Bund Length in meter: 2200 

No. of Outlets: 3 (1 Weir and 2 Sluices) 

Inference from KKPA Team: 

The tank receives it supplies from Kuniyamuthur anaicut via Kuniyamuthur large tank and discharges into Kurichi tank. This lake has a combined catchment of 5.95 sq.km. The lake has 1 weir and 2 irrigation sluices. This lake and Kuniyamuthur lake has a combined ayacut of 498 acres. The length of the weir is 41.76.Maximum flood discharge from the lake will be 589 cu.ft/second. Th revertment water spread area is around 25 acres. Social forestry is seen inside the lake bed. The foreshore land has been occupied for both residential and agricultural purposes. Building debris and solid wastes are found along the bund. 

A village road connecting Kovaipudur passes over the bund. 25% of the water spread alone is free from silt. The silt can be removed. The quantity of silt to be removed might be around 1 million cubic foot. The available in the bund need to be disturbed or closed by people, volunteer for deepening of tank. 

The regulator provided at the right flank has been closed for unknown reasons. This should be made opened and made functional. A temple has been constructed on the bund. This must be removed. Housing board had tested the soil near the southern part of the bund for the construction of housing tenements. They should be allowed to encroach upon the bund and lake foreshore. A building has been constructed on the outlet for commercial purposes. A supply channel from Sengulam tank to Kurichi Lake has become very narrow and needs widening. 

Google Maps: SENGULAM

Hydraulic Particulars:

Capacity (in M.C.Ft.): 51.94

Ayacut in acres: 866

Depth of storage in feet: 14.82

Bund Length in meter: 1350

No. of Outlets: 7

Inference from KKPA Team:

This lake is also called Puttuvikki lake or Sundakamuthur lake. This lake receives its supply from Kuniyamuthur anaicut channel. It also receives its supply from a combined catchment of 2.61 sq.km. The surplus of GangaNarayanaSamudram also joins this lake. There are 6 irrigation sluices. The Ayacut was 866 acres. The maximum flood discharge from the lake is 1100 cusecs. There are two weirs in the lake to discharge the surplus. The aggregate length of the weir is 35.66 metres. The surplus of this lake goes to Sengulam tank. This has the large water spread of 264.88 acres. The tank bed has Social forestry plantation. The tank was desilted approximately and the encroachments were removed in the recent past. A road runs on top of the bund, which adds safety to the land.

Google Maps: PERUR BIG TANK

Hydraulic Particulars:

Capacity (in M.C.Ft.): 3.41

Ayacut in acres: 94

Depth of storage in feet: 4.5

Bund Length in meter: 780

No. of Outlets: 2

Inference from KKPA Team:

This tank receives its supply from Chittiraichavadi anicut. Free catchment of the lake is negligible. There are two sluices and one natural ground escape for surplussing the excess water. In place of the natural ground escape, a calingulah with dam stone may be provided. A BT road runs on the shore of the bund which is an advantage for the safety of the bund against breaching. The supply for the tank has been insufficient for the past 50 years due to encroachment of the supply channel. The width & supply channel is just 2 metres. Construction debris and solid waste has been dumped along the bund. The channel needs widening. The foreshore lands are encroached for agricultural purpose. Cutting of trees for firewood should be stopped for enabling nesting of birds.

Google map: PUDHUKKULAM

Hydraulic Particulars:

Capacity (in M.C.Ft.): 5.92

Ayacut in acres: 133

Depth of storage in feet: 5.5

Bund Length in meter: 1170

No. of Outlets: 3(1 weir & 2 Sluice)

Inference from KKPA Team:

 Kolarampathy lake’s outlet is in blocked state.As Gravely sand is more, percolation is high.

Inlet is narrowed, which will take more time for the lake to get filled even when there is huge flow from canal. Bunds need to be strengthened. Lot of trees are present inside and outside the lake, which will act as a shelter for birds and other organism. Special care needs to be taken for the sluices and weir. Bund is fairly good for the present storage. The earth to be removed for deepening may be dumped on the present bund itself. Road has been laid on the bund.

The two sluices are of no use now. Anyhow, this has to be properly maintained to allow passage of surplus at the time of emergency.The adequacy of the surplus weir is to be worked out based on maximum flood discharge to be provided for.Solid waste dumping is seen on the sides of bund and water spread.

The trees in the water spread will absorb lot of oxygen and this may lead to reduced oxygen level in the stored water which will become determined to aquatic life. Planting trees on the bund with deep rooted varieties may pose a danger to the bund in the long run. Only small trees with restricted root spread and trees like coconut, date trees, palm trees are recommended.

Water quality parameters need to be checked. Bacterial analysis may also be made if the budget permits.

Google map: KOLARAMPATHY LAKE

Hydraulic Particulars:

Capacity (in M.C.Ft.): 9.5

Ayacut in acres: 551

Depth of storage in feet: 11

Bund Length in meter: 1600

No. of Outlets: 4 (1 Weir& 3 sluice)

Inference from KKPA Team:

 Narasampathy lake receives its supply from a channel which is sourced from Chittiraichavadi anaicut (First anaicut across Noyyal). The supply can be regulated according to the requirement. This lake also receives supply from natural drains originating from Maruthamalai and Edayarpalayam which is not under human control. The surplus water of the lake goes to Selvampathy lake and then the surplus of Selvampathy goes to Kumaraswamy lake. The trees and the road are not dangerous to the bund. The bund has been consolidated due to vehicular traffic on the road(bund).

WATERSPREAD:

  The water spread area has been encroached by TNAU (5.06 acres). A portion of the water-spread has been occupied for living by about 150 huts.

WEIR:

  The length of the weir is 13.87 m. The adequacy of which is to be verified due to increased discharge from catchment. This verification leads to increase the weir by another 13.87 m.

DOMESTIC WASTE:

  Domestic waste from Nagarajapuram areas directly enter the lake causes very high pollution, food waste is also thrown in the lake bed. Road laid in front of the surplus coarse, encroached in the surplus water. Weir body wall is found damaged. Margosa tree has been grown on the weir. There are about 500 homes has encroached. COC has taken the ownership for the tank. Electricity and road facilities has been provided for encroachments,which paves way for all encroachments in the waterways and water. There is a big housing colony in the left flank of the lake.

Google map: NARASAMPATHY LAKE

Hydraulic Particulars:

Capacity (in M.C.Ft.): 7.67

Ayacut in acres: 569

Depth of storage in feet: 11

Bund Length in meter: 950

No. of Outlets: 3 (1 Weir& 2 sluice)

Inference from KKPA Team:

    Krisnampathy lake receives its supply from Noyyal river through Chittrai chavadai channel taking off from ChittraiChavadai anaicut. Besides this, the lake also receives its supply from its free catchment through two big streams, from forest area and research farm called Karparayan area of TNAU. Water stored is foamy indicating chemical wastes let into the tank. Lot of grey water also enters into the tank. Lot of aquatic weeds are seen in the lake which should be removed. All the three inlets, north-east, north-west, and west need some intervention. About 25 acres of the water spread had been handed over TNAU during British period. There is some encroachment by TNEB and corporation school playground totaling of about 15 acres. There are about 350 huts occupying about 3 acres in the foreshore. The total encroachment both official and unofficial is about 43 acres. Dumping of debris and domestic solid waste along the bund spoils the ecology and health of the water body.

  A BT (black topped) road runs on the top of the bund, which can prevent any damage to the bund due to self-consolidation of the bund due to the vehicular traffic of the road.

     The two sluices are to be maintained with regulating arrangements so as to regulate water levels at the time of emergency. There is a temple near one of the sluices. All sorts of illegal activities are said to take place along the bund adjacent the sugarcane research institute. The flow from free catchment from the forest is unregulated and this needs some intervention as already mentioned.

Google maps: KRISHNAMPATHY LAKE

Hydraulic Particulars:

Capacity (in M.C.Ft.): 19.89

Ayacut in acres: 190

Depth of storage in feet: 10.5

Bund Length in meter: 750

No. of Outlets: 3 (1 surplus and 2 sluices)

Inference from KKPA Team:

 This lake receives its supply from the excess of Selvampathy Lake. Religious wastes are being dropped here. Mixing of sewage exists in the lake. Plaster of Paris is settled in the bottom and must be removed. This might be the reason that groundwater is not getting recharged and seems lesser in these areas. Lead is found to be in existence at a traceable limit. BOD level is 168/mg. Inland fishery activities are taking place. Control of irrigation should be made possible. There is no revenue land in this lake. No proper sewage treatment is observed at the outlet. There is no way for recharge pits and recharges wells.

    Treatment plant should be built near the lake. Dying industry in upstream and downstream pollutes the lake.Effects of toxins are more. Bio accumulation occurs here due to entry of chemicals. Exploited food products are dumped. Artificial bunds with synthetic liners may be adapted. Plaster of Paris could be recycled into chalks and fertilizer. Bunds can have trees. But they are demolished to construct roads to facilitate human needs. Dumping of wastes inside the lake must be strictly prohibited. Houses on bunds should be removed. Corporation should not give any permission to build houses near bunds. Siruvani pipeline goes here. Although, water exists all around the year in lake, irrigation is nil. Ground water is also not getting recharged properly.

Google Maps: KUMARASWAMY/MUTHANNAN LAKE

Hydraulic Particulars:

Capacity (in M.C.Ft.): 3.02

Ayacut in acres: 72

Depth of storage in feet: 6

Bund Length in meter: 1500

No. of Outlets: 1

Inference from KKPA Team:

        The lake receives its supply from Chittirai chavadi anaicut through the surplus of Kumaraswamy lake. It also receives its supply from its own catchment of 0.653 sq.km. The water spread area is 0.149 sq. km. Length of the bund is 1500 km. It has a regulator with 3 vents to discharge the surplus. This surplus coarse is led into Ukkadam tank. This surplus channel has been occupied for road widening. To discharge the surplus, a bore shaped canal has been constructed which can carry a maximum of 50-60 cu.ft per sec( roughly 2 cusecs) .The PWD has to operate the surplus regulator in such a way to protect the tank bund by closing the supply from Kumaraswamy lake (or) by reducing the discharge from Chittirai chavadi anaicut. The discharge from the catchment of Selva Chinthamany is not under human control. If the inflow is heavy even after arresting the supply through the supply channel, then the entire inflow has to be released through the regulators unmindful of the spillage from the concrete surplus channel. The free catchment mentioned as 0.653 sq. km. seems to be negligible when compared to the area drained by 2 natural drains coming from Marudamalai RF. This has to be verified with the top sheet of the Google Earth map. In order to avoid the spillage of water from the concrete surplus coarse, a new concrete drainage channel may be constructed below the road to carry the entire maximum flood discharge from Selva Chinthamany and connected to Ukkadam lake. On the eastern side of the bund, lots of goldsmiths have their shops and the chemicals which they use in the process comes and joins in the tank, adding to pollution. Moreover, uncontrolled open sanitationis spoiling the atmosphere of the area which can be avoided by construction of public toilets with proper maintenance by COC. The dilapidated structure in the water spread is to be removed. The outlet on the north side has been cross bunded temporarily to avoid inundation of the residential area on the north during monsoon season. This has to be permanently closed by a concrete structure.

Google Maps: SELVACHINTHAMANI LAKE

Hydraulic Particulars:

Capacity (in M.C.Ft.): 9.5

Ayacut in acres: 206

Depth of storage in feet: 11

Bund Length in meter: 1116

No. of Outlets: 2 (1 weir dam and 1 sluice)

Inference from KKPA Team:

The tank recives it’s supply from Chittrai chavadai anaicut and from its free catchment of 1.54 sq.km. The water spread area is 0.283 sq.km. There is a common bund between Selvampathy lake and Kumaraswamy lake. The Siruvani water supply pipeline runs through the common bund. The pipeline is found to be leaky. There is a pedestrian crossing through the outlet of Selvampathy in the common bund. As the people in the foreshore of these two tanks use this outlet as a footpath, construction of a footbridge over the outlet is necessary. EB HT (high tension) & LT (low tension) lines are crossing over the water spread which affects the free movement of birds in the lake. It will be better if the lines are removed and taken around the water spread. Additional island utilizing the earth during desilting may be created for afforestation. This will facilitate nesting of more birds in the lake. The four vents in the inlet are of poor maintenance. A complete overhaul of the shutters with hoist arrangements is necessary. There are dyeing and bleaching industries which release their settlement into the tank. This causes chemical pollution of water. This is determined by the presence of foam in the lake. The source of pollution is yet to be identified. Lot of medical waste is being dumped along the bund. Building debris is also dumped on the bund. Action on the part of the corporation is necessary to get rid of the above problems. A BT road runs on a part of the bund.

Google map: SELVAMPATHY LAKE

Hydraulic Particulars:

Capacity (in M.C.Ft.): 2.89

Ayacut in acres: 342

Depth of storage in feet: 9.9

Bund Length in meter: 1450

No. of Outlets: 1

Inference from KKPA Team:

The lake receives its supply from Kuniyamuthur anaicut channel through Sottaiyandi Kuttai. The right flank weir in Sottaiyandikuttai acts as inlet for GangaNarayanaSamudram. The surplus of Ganga Narayana Samudram passes through the weir at the right flank. The length of the weir is 3.35 metres. This lake also receives its supply from its own catchment of 0.14 sq. miles (0.36 sq. km). The surplus from this lake is to the tune of 102 cu.ft per sec which cannot cause huge inundation of the road below the surplus weir.

 The ayacut under the tank was 342 acres. Social forestry is available in the lake bed, which is useful for nesting of birds.

Google Maps: GANGANARAYANASAMUDRAM

Hydraulic Particulars:

Capacity (in M.C.Ft.): 2.83

Ayacut in acres: 53

Depth of storage in feet: 7

Bund Length in meter: 1050

No. of Outlets: 1

Inference from KKPA Team:

            This lake receive its supply from Kuniamuthur anaicut channel and its own catchment of 0.08 Sq.miles (0.20 Sq km).There are no trees in the water spread. Length of the bund is 1050 meters. The original anaicut was 53 acres. The length of the weir is 4.87 meters. Capable of discharging 100 cu.ft/sec (2.83 cu.m/sec), the tank was deepened by an NGO. A balancing sluice constructed in olden days in the common bund between Sottaiyandi kuttai and Ganganarayana samudram lake is in a damaged condition, requires reconstruction. The bund has been raised to super standards in respect of free board and top width. This will ensure safety of the bund against any breach. Building debris and solid waste dumping is seen along the bund. A village road runs on the northern part of the bund.

Google Maps: SOTTAIYANDIKUTTAI

Hydraulic Particulars:

Ayacut in acres: 486

Depth of storage in feet: 7.5

Bund Length in meter: 1000

No. of Outlets: 2(1 Weir and 1 Sluice)

Inference from KKPA Team:

The lakereceives it supplies from Kuniyamuthur anaicut channel and also from its catchment area of 5.698 sq.km.The weir has been extended long back and the current length is 41.77 km.

There are 2 sluices.The ayacut under the lake was 486 acres. The water spread area is (7.6 x 27.92) 174.42 acres. Garbage dumping is rampant in the lake. Further investigation about the lake may be required.

Google Maps: KUNIYAMUTHUR SMALL TANK

Hydraulic Particulars:

Capacity (in M.C.Ft.): 27.88

Ayacut in acres: 870

Depth of storage in feet: 14.75

Bund Length in meter: 5600

No. of Outlets: 5 (1 weir)

Inference from KKPA Team:

 Valankulam lake receives its supply from Coimbatore anaicut channel via Ukkadam Big tank. In addition to the above supply it receives supply from its free catchment of 8.28 sq.km. This tank had a surplus weir of 21.04 m at the left flank, which is not in existence now. It had 6 sluices for irrigation, now there is no irrigation under the tank. A BT (Black topped) road runs on the top of the tank bund. The Ayacut under the tank was 878 acres. The water spread area was 6.97 x 22.95[i.e. 159.96 acres]. The maximum flood discharge from the tank adopting ‘C’ value as 300 is 651 cusecs. The value of ‘C’ is not applicable for an urbanised area, where it should be minimum 600. Thus, the anticipated maximum flood discharge will be around 1300. For discharging this quantity, the original surplus arrangement is not available.

 The weir was dismantled for the widening of road. Now, any surplus from the lake has to go through a big SWD (Storm Water Drain), which can carry a maximum of 100 cu. ft/sec.

 A new surplus arrangement should be made at the left flank to discharge maximum flood discharge. The original surplus coarse from Valankulam joined a drain called Sanganoor pallam, from where it was going to Singanallur tank. This ‘odai’ (Sanganoor pallam) is divided into two; one at the left and the other on the right of Coimbatore-Trichy road. If the surplus of the Valankulam is drained at the rate of 100-150 cusecs by constructing a trough shaped weir or a siphen weir. The remaining flood should be allowed to pass through a concrete retaining wall. The length of the wall should be hava a high coefficient profile to give a discharge of 1300-150 = 1150 cusecs, which has to necessarily flow over the adjacent road. If this is not provided, due to fear of inundation, there is 99% possibility for a breach of the bund causing loss of property. It should be ensured that no water is released through the regulator at Ukkadam lake for supplying water to Valankulam, once Valankulam reaches F.T.L.

 All the sewage in fall from the catchment should be interconnected and taken to the nearest STP for treatment. The treated water may be let into the lake.

Fishingis already carried out in this lake, but the fish must be tested for toxicity levels. After treating the lake water, when it becomes free of pollutants, more fishing activities may can be encouraged.

Dumping of waste in and around the tank should be strictly prohibited and strict action against such actions must be taken by Corporation of Coimbatore.

GOOGLE MAPS: VALANKULAM

Hydraulic Particulars:

Capacity (in M.C.Ft.): 52.27

Ayacut in acres: 845

Depth of storage in feet: 19.95

Bund Length in meter: 3102

No. of Outlets: 4 (1 weir and 3 Sluices)

Inference from KKPA Team:

     Singanallur Lake is located to the southwest of Singanallur village. This is very close to the village. Free catchment area is 4.60 Square miles (11.94 Square km). Besides, the free catchment this lake receives its supply from Singanallur anaicut channel. The length of the bund is 3102 meters.

      The ayacut under the tank was 845 acres. The lengths of the surplus weirs are 30.56 and 39.63 meters. The tank has three sluices. The water spread area is 285 acres. Capacity of the tank at FTL (Full Tank Level) is 66 million cubic feet (M.C.ft). Total annual storage is 132 million cubic feet which means the number of fillings is 2. The supply channel taking off from Singanallur anaicut is in dilapidated condition and needs extensive repairs.

      The outlet at the end of the channel, where it joins the tank has been completely damaged and the flow from the channel is not entering the tank. A complete revamping of the system is needed to keep the tank as a biodiversity lake. The lake bed has been encroached for agriculture and solid waste dumping. Building debris is also dumped in the lake bed. At present, the supply from “Sanganoor pallam” has been divided into two for Trichy road.

     Thus the channels run on both sides of the road. Lot of untreated sewage is let into the lake freely, which very much affects the quality of storage. The railway line which runs across the water spread bisects the lake. The lake has become a tourist spot and also boating is allowed in the lake.

Google Map: Singanallur Lake

Hydraulic Particulars:

Capacity (in M.C.Ft.): 10.77

Ayacut in acres: 117

Depth of storage in feet: 6.25

Bund Length in meter: 2300

No. of Outlets: 3(2 Weir and 1 Sluices)

Inference from KKPA Team:

This tank comes under Pallapalayam anaicut channel group. This is situated in the west of Pallapalayam village in Sulur Taluk. This tank has free catchment of 14 Square miles/36.26 Square kilometer. Besides its free catchment the tank receives its supply from Pallapalayam anaicut across Noyyal river. The capacity of the tank at F.T.L is 10.78 million cubic feet /0.31 million cubic meters. The depth of storage above the lowest sill level is 6.25 feet /1.91 meter. The annual inflow into the tank is 21.56 million cubic feet /0.61 31 million cubic meters.

The water spread area is 123.52 acres/50 hectare. The ayacut under the tank was 117 acres/47.37 hectare. The tank has only one sluice. The anticipated maximum flood into the tank is 1824 Cusecs or 51.65 cubic meter.

There are two surplus weirs. The lengths of the weirs are 5.41 meter and 25.6 meters.

Now, the lake is full, almost throughout the year due to flow of sewage into the tank from Noyyal River. The water is highly contaminated in which fishing activity is flourishing. The fish is tested against toxicity. It should be definitely toxic and consuming them will be hazardous for human beings. The district administration should think of banning fishing activity. The water entering the tank in the left flank is dark in color signifying contamination. Garbage dumping of the local body at the left flank should be avoided. Now, the leachate from garbage can directly enter the inflow into the tank. The dead fish floating in the water spread are clear indication of highly contamination of storage. Now, the local body is raising a compound wall, just by the side of the bund on the left flank for dumping the garbage. This should be stopped by the district administration in the interest of the water body. If at all, the garbage is to be damped within the compound, it should be done in a scientific way so as to arrest the leachate finding its way into ground water. A road runs on the top of the bund.

Google Map: Pallapalayam Lake 

Hydraulic Particulars:

Capacity (in M.C.Ft.): 2.4

Ayacut in acres: 58

Depth of storage in feet: 9

Bund Length in meter: 1050

No. of Outlets: 2

Inference from KKPA Team:

Even though, the tank is in existence now, according to the memoir the tank is an abundant source. The PWD records shows the following details:

F.L.T-2.74 meter,

M.W.L-3.34 meter,

T.B.L-4.24 meter

The tank receives its supply from Odderpalayam anicut via Pallapalayam tank. Some area of the tank bed has been encroached for agriculture. The tank has road on all four sides. The tank water is highly contaminated with presence of dead fishes. Pollutants may affect human beings due to the consumption of the fish from the lake. Fishing activity should be stopped by district administration. The quality of ground water around the lake is to be tested for toxicity.

Google Map: KANNAMPALAYAM TANK

Hydraulic Particulars:

Capacity (in M.C.Ft.): 24.76

Ayacut in acres: 334

Depth of storage in feet: 14.6

Bund Length in meter: 2561

No. of Outlets: 3(1 weir And 2 Sluice)

Inference from KKPA Team:

This tank which was in existence from ancient times, was receiving its supply from its free catchment of 75.47sq.km. But at once the tank was abandoned and was in ruins. But, the present supply channel called Rajavaikkal had been in existence from ancient times. In 1940s, two local readers, Suppana Gounder and Kapini Gounder influenced the then Governor of Madras state, Sir. Arthur Hope through G. D. Naidu and got the tank renovated in 1942, which is in present form.

This tank has two sluices and 3 surplus weirs. The capacity is 24.76 million cubic feet with a command area of 396 areas. The depth of storage is 14.60 feet. The surplus of the tank goes to Noyyal River which is coming from a pollutes lake, Irugur. The storage in this lake is also in a polluted stage while there is no foul smell from this lake like Irugur Lake. The reason may be due to water from the free catchment of the lake and the large volume of water in the lake.

Anyhow, the farmers are interested in keeping the storage at all times for recharge of ground water.

Google Map: AACHANKULAM/NEELAMBUR LAKE

Hydraulic Particulars:

Capacity (in M.C.Ft.): 17.94

Ayacut in acres: 552

Depth of storage in feet: 8.5

Bund Length in meter: 1450

No. of Outlets: 3(1 weir And 2 Sluice)

Inference from KKPA Team:

This tank is situated to the west of sulur. It has a tree and combined catchment of 3.4 sq.mile/8.81sq.km. This tank also receives it’s supply from Sulur anaicut across noyyal river. The tank has a capacity of 17.95 million c.ft/0.51 million cub.meter. The depth of storage is 8.5ft/2.59m. The annual runoff into the tank is 35.90 million cft/1.02cu.m water spread area is 164.85 acres / 66.74 hectare. The tank has 2 shives and 1 surplus escape of 55.07feet/16.79m. The surplus is filled with 7 shutters. The surplus goes to Sulur chutteri or Sengulam tank. The maximum flood discharge of the tank is 751 cu.ft/ sec.

The water in the tank is contaminated and not fit for any use. Lot of dead fishes are seen in the lake which means the lake is not fit for encouraging pisciculture. There is a jetty for boating activity in this tank for recreation purpose

GOOGLE MAP: SULUR BIG TANK

Hydraulic Particulars:

Capacity (in M.C.Ft.): 14.51

Ayacut in acres: 552

Depth of storage in feet: 13.03

Bund Length in meter: 110

No. of Outlets: 3

Inference from KKPA Team:

  This tank is situated half a km from the north of Sulur . This has a free catchment of 1.30sq.mile/3.37 sq.km. The combined catchment is 4.7 sq.miles/ 12.17 sq.km. Besides supply from the catchment , the tank receive supply from Sulur anaicut via Sulur big tank . The water spread area of the tank is 82.43acres/33.37 hectares.

  The combined anaicut of big tank and Sengulam is 52.2 acres/211.34 hectare fed by 3 shives. The length of the two surplus weirs are 16 feet/4.88 m and 200feet/60.98 m. The maximum flood discharge into tank is 9.13 cubes/25.85 cubic meter. The surplus goes to noyyal river. As the water in the tank is contaminated due to entry of sewage, a sewage treatment plant was set up by the Panchayat in the 1990s, which was functioning satisfactorily . This was the first effort in the state to provide a STP, at panchayat level and attracted many people across the state to visit the plant. Unfortunately the STP broke down in the middle and efforts are taken now to re-establish the sewage treatment plant with modern technology. Once the sewage is treated to secondary level and let Into tank, the lake water might be suitable for irrigation and pisciculture.

Google Maps: SULUR SMALL TANK

Hydraulic Particulars:

Capacity (in M.C.Ft.): 69.95

Ayacut in acres: 1425

Depth of storage in feet: 19.1

Bund Length in meter: 2880

No. of Outlets: 5(1 weir & 4 Sluice)

Inference from KKPA Team:

This lake work is being undertaken by Smart City Scheme and the work is in progress. One request is to repair the recently damaged weir as soon as possible.

GOOGLE MAPS : UKKADAM BIG TANK

HYDRAULIC PARTICULARS:

Capacity (in M.C.Ft.): 60

Ayacut in acres: 452

Depth of storage in feet: 510.75

Bund Length in meter: 2400

No. of Outlets: 6(1 weir & 5 Sluice)

Inference from KKPA Team:

Road is constructed for Ukkadam by-pass. The bypass formed on the banks of Kurichi supply channel has been provided with trailing wall with concrete for the distance of 1.5 (to be verified) kilometres. The bridge across the channel leading to Puttuvikki is the starting point of training wall. During the commencement of the work the local NGO represented to leave a gap in the training wall portion to facilitate the entry of heavy earth moving machineries for removing slits from the channel. Corporation agreed for leaving a gap. This was presented to Public Works Department (PWD).

The PWD also agreed for the proposal and assured to arrange for a gap near the bridge. But the entire wall has been constructed near the bridge portion without keeping the promise of the Corporation. This act completely arrested the possibility of removing silt by engaging machinery in the Kurichi channel.

The Isha foundation and NLC has carried out extensive deepening in the tank which has increased the capacity of the tank considerably. Four islands have been formed for afforestation and planting is yet to be started. The surplus water on the extreme left. Near the channel inlet requires minor repairs. The roadside of the lake has been considerably widened and trees may be planted on the inner slopes. The sewage inlet is at two points and sewage inlet in the supply channel may be arrested by COC.

GOOGLE MAPS: KURICHI KULAM

HYDRAULIC PARTICULARS:

Capacity (in M.C.Ft.): 7.98

Ayacut in acres: 69

Depth of storage in feet: 8.67

Bund Length in meter: 854

No. of Outlets: 2(1 weir & 3 Sluice)

Inference from KKPA Team:

This tank is situated to the east of Irugur village in Sulur taluk. This tank receives its supply from a free catchment of two Square miles. It also receives its supply from Irugur anaicut channel and from Noyyal river. The surplus of the tank goes to the Noyyal river as per memoir. But, now the surplus goes to the Aachankulam or Neelambur tank which was formed after the investigation of tank restoration scheme during 1980s. This tank was in abandoned stage and was renovated due to the efforts of Kappini Gounder and Suppana Gounder. These two people influenced the Governer of Madras, Sir.Arthur Hope with the help of G.D Naidu. Thus the tank was renovated in 1942. (See the details under Aachankulam).

The storage of Irugur tank is foamy and foul smelling. The colour is too dark and lots of dead fishes are found in the lake.

The water is not fit for any use. The ground water around the lake should contain lot of pollutants and metallic compounds which may spoil the health of the people living around the lank. A physical and chemical property evaluation of the ground water sources around the lake is a must for which the district administration should step-in.

GOOGLE MAPS: IRUGUR LAKE