Measures to tackle flooding in the Karimadom Colony area accorded top priority

Lives were lost and houses and property destroyed in flash floods in the city on New Year’s Eve in 2011, prompting the State government to take serious note of flood mitigation measures.

The Government Order issued in the wake of the calamity split the execution of work into short-term and long-term measures, the latter including solutions that, if approved, will be carried out with the support of Central aid amounting to Rs.700 crore.

An initial ‘pre-feasibility’ report was submitted to the Union Ministry of Environment and Forests by the Irrigation Department. But for such a large sum to be sanctioned, a survey preceding the formulation of a detailed project report needs to be completed by a Union government-accredited agency. Thus, the Rail India Technical and Economic Services (RITES), an organisation based in New Delhi, has been entrusted with the survey. The RITES team has set up temporary quarters here last year to undertake the mammoth exercise primarily along the Karamana and Killi rivers.

According to Superintendenting Engineer of Irrigation Department G. Anil Kumar, the team will complete the survey by June. Provided its provisions comply with government guidelines, the project will get the approval of the MoEF. This project promises to address a whole array of issues from waste management to building flood moderation tanks and sewage treatment plants.

In flood mitigation development, tackling of flooding in the Karimadom Colony area has been accorded top priority. It takes cognisance of the fact that the Karimadom Tank and the adjoining marshy areas were once a ‘flood cushion, but the accumulation of silt in the tank and the urbanisation of the areas have rendered this original role obsolete.

Identification and design of bund protection measures, and suggestion of suitable shutter arrangements to prevent reverse flow of drain water figure in the comprehensive scheme. One of the suggestions that will figure in the report, according to Mr. Anil Kumar, is a cut-and-cover drain through the main road near Kuriyathy, an area close to the colony. “In case of unprecedented rainfall, this underground flood moderation tank will serve as a reservoir. The RITES team are also studying in-depth the topography of the area and they plan devising a route that will expel this stored water out to sea,” explained Mr. Anil Kumar. Apart from the creation of this underground tank, the Karimadom Tank would be rejuvenated as well. In addition, RITES officials would survey the entire length of the two rivers. A ‘flood routing’ exercise would follow and this would simulate the extent of a flood that could take place.

  • Underground flood moderation tank to be built

  • RITES to survey full length of Killi, Karamana rivers