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Redesign of drainage system in Cauvery delta mooted

Special Correspondent

Central team assesses damages caused by heavy rains in the Delta region of Tiruvarur district



ASSESSMENT: The Central team led by Joint Secretary, Union Ministry of Home Affairs, K.Skandan (centre) along with Minister for Dairy Development U.Mathivanan on Wednesday having a look at the major damage caused by the breach of Pamaniar in Tiruvarur district.

TIRUVARUR: The Tamil Nadu Cauvery Delta Farmers’ Welfare Association has suggested that the entire drainage system of the delta should be redesigned and made more effective in discharging the enormous flood flows during the northeast monsoon period.

This was suggested to a Central team, led by Joint Secretary in the Union Home Ministry K. Skandan, which came to assess the damages caused by the heavy rains in the delta region of Tiruvarur district on Wednesday .

At a meeting with the Central team members in Mannargudi, S.Ranganathan, general secretary of the association, who submitted a memorandum to the team had stated that that most of the irrigation channels or rivers of Vennar division were irrigation-cum-drainage rivers.

Rivers like Pamaniar, Koraiyar and Vennar are not only carrying their own drainage but also enormous flood water from upland areas of the Delta including Tiruchi, Thanjavur and Pudukottai districts.

He said that though these river banks were designed to carry flood water up to 3,000 to 3,500 cusecs, the rivers carried more than 10,000 cusecs during high floods as happened in the year 1979, 1983, 1993, 2005, 2007 and now in 2008 and over time the banks breached unable to bear the heavy discharge.

He pointed out that in some places, the number of drainage channels were not sufficient to discharge or drain the flood water resulting in the entire fields getting totally inundated. For example, this has occurred at Tirupoondi, Talainayar in Nagapattinam district, Marikka Korayar in Tiruthuraipoondi taluk and Ramapuram drainage in Savalakkaran in Mannargudi taluk in Tiruvarur district.

Mr. Ranganathan also brought to the notice of the team that periodical desilting was being done only on the irrigation channels while the age-old drainage channels and the siphons provided therein had never been attended.

He said that ‘ipomea’ plants (known as Neyveli Kattamanakku) all along the river beds had grown to gargantuan proportions. Removal by employing heavy earthmoving equipment has failed so far. In fact, this time, the beach in Pamaniar river near Mannargudi on the Mannargudi-Needamangalam Road was essentially due to clogging by the plants in the western part of the town.

The other major problem that plagues many of the river systems is the obliteration of the ‘flood plains’ or called ‘padugai’ lands on either side of the river. Wherever ‘padugai’ is present, there will be no breach or flooding. But most of the padugai lands in the delta have given rise to housing colonies, brick kilns where once existed extensive mango groves, teak and tamarind trees that acted as natural barriers for the floods.

CPI representation

V.Veerasenan, Tiruvarur district secretary of the Communist Party of India (CPI), urged the Central team to give a compensation of Rs.15,000 per acre of paddy crops lost in the rains.

He pointed out that the compensation of Rs.7,500 per hectare (Rs.3,000 per acre) announced by the Tamil Nadu for paddy crops damaged in the floods was very meagre. He also urged the Government to give Rs.10,000 for the houses damaged in the rains instead of the present Rs.2,000.

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