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"The Natural drainage in Tamil Nadu is generally towards the East as the ground slopes down to the Bay of Bengal. Therefore, any flood diversion proposal should also follow this direction. Any other attempt may have detrimental consequences.

The (proposed open) Channel is taken along a circuitous route and hence the length is high and the bed slope is very mild. The proposed channel will also obliterate the Kathirvedu Thaangal which is the only fresh water storage pond which recharges the Ground Water in the area which is not desirable. Also, the Channel has an acute turn. The consequences are: (i) the cross section of the Channel will be large requiring large land are to be acquired at a high cost; and (ii) the hydraulic function of the channel will create flooding, scouring and silting at the location of the turn.

Any attempt to drain off the water from Madhavaram tank should finally reach Captain Cotton Canal. Diverting the flow to the Red Hills surplus course may not be viable because of the ground levels at Madhavaram Tank left Surplus Course. Therefore it is recommended that the flood diversion canal should necessarily follow the original direction of flow from the Madhavaram Tank right surplus course."

9. The petitioner has also suggested that underground pumping system can be implemented so that the industrial effluent/sewerage water filled Korattur lake would not pollute water source of Kathirvedu Thangal or potable water source of Madhavaram tank which is used for metro water. The petitioner has also pointed out that instead of removing the encroachers of water bodies including canals and channels, the authorities have chalked out an alternative plan which contains many practicable defects and which would also affect the lawful residents. The petitioner has therefore prayed for appointing a Committee headed by a retired Judge and consisting of experts as well as representatives of the locality and representatives of the encroachers to suggest permanent solution.

RECOMMENDATION Any attempt to drain off the water from Madhavaram tank should finally reach the Captain Cotton Canal. Diverting the flow to the redhills surplus course may not be viable because of the ground levels at Madhavaram Tank left Surplus Course. Therefore it is recommended that the flood diversion canal should necessarily follow the original direction of flow from the Madhavaram Tank right surplus course."