Reported by Vishwanath Kumar
Kendrapara, May 28:
After a sluggish start and delays, the construction work for Odisha’s first geo-synthetic tube seawall project to protect a cluster of thickly populated seaside human settlements in Kendrapara district from sea incursion, is now on track , sources said..
Being a highly technical project, it’s a time-consuming construction work and the deadline for completion of the project has been set to March 2015, said officials of saline embankment division here.
The project, commissioned under the World Bank-funded Integrated Coastal Zone Management Programme (ICZMP), is primarily to protect vulnerable villages from sea erosion in Rajnagar block in Kendrapara district.
“The proposal for geo-synthetic tube seawall was mooted in 2008. However, due to a variety of reasons that were beyond our control, it got delayed. Work has now begun under the technical supervision of engineers deputed by ICZMP and coastal embankment division of the state government”, said Executive Engineer, Coastal Embankment Division, Jugal Kishore Tripathy.
A Pune-based farm, which was awarded the project under global tender bidding process, is carrying out the work at a total cost of Rs 33 crore. The Indian Institute of Technology(IIT), Chennai had extended technical support to the project as it requires a high degree of technical skill to tame the might of the marauding sea. “We expect the completion of work by March 2015 year,” Tripathy added.
The foundation of state’s first such project was laid by chief minister Naveen Patnaik in 2008. However technical modification of the project plan and delay in floating of global tender has led to the holdup of the project. It had led to the cost escalation of the project, which has risen from the initial estimate of Rs 15 crore to Rs 33 crore now, said the official.
Earlier Indian Institute of Technology, Chennai had given the go-ahead to the sea-erosion-control project, after conducting wide-ranging scientific and morphological study of the vulnerable coast.
To withstand the ingress of tidal waves, the sea wall geo-tube barrier embankment will be as high as 7.4 metre as the tidal surge rises to 5 metre during cyclonic storms. The length of the geo-tube embankment would be 675 metres while the plinth of the seawall would be three metre deep.
The geosynthetic tube would resist the impact the ultra-violet rays and tidal velocity. As per the technical plan, geo-tubes made up of high grade rexin and filled with sand would be put in place at the erosion-hit Pentha embankment. These bags would act as protective barrier against tidal waves. It would absorb the tidal ingress, salinity and sodium chloride contents in sea water and stop the erosion of embankment, Tripathy informed.
The decision to erect geo-tube to arrest sea erosion was taken on the basis of findings of IIT, Chennai. The oceanographic experts deputed by Chennai IIT had studied among other things the beach profile, moisture contents of sandy particles, morphology of the eroded beach, intensity, frequency and velocity of the waves”, Executive Engineer, Tripathy told OST.