1. Chennai IIT has accorded the go-ahead
2. Use of geo-tube would be a better erosion proof mechanism, as it would reduce striking force of the mighty sea waves.
The construction work of State’s first geo-tube sea wall project under World Bank-funded Integrated Coastal Zone Management Programme (ICZMP) in Odisha’s Kendrapara District would get underway shortly.
Indian Institute of Technology, Chennai, has accorded the go-ahead to the much-awaited sea-erosion-control project after its experts had conducted wide-ranging scientific and morphological study of the vulnerable sea coast.
“It has submitted its findings in a comprehensive report. The premier institute has also approved the technical design and plan of the anti-sea-erosion project at Pentha in Rajnagar tehsil. Tender bid of the Rs. 22-crore project is being invited. We are hopeful that the project work would start this winter”, Mr. Jugal Kishore Tripathy, Executive Engineer, Saline Embankment Division, has said.
The sea wall, where the geo-tube barrier would be installed, is to be erected at an estimated cost Rs. 22 crores. The embankment height would run up to 7.4 metres. The tidal surge rises up to 5 metres during cyclonic storm. Thus it could withstand the ingress of tidal waves. The length of the embankment would be 675 metres instead of 700 metres as was planned earlier, he informed this reporter.
IIT experts had conducted comprehensive scientific study of the erosion prone coast for the installation of geo-tube sea wall to save a cluster of highly threatened hamlets in the district.
The oceanographic experts deputed by the Chennai IIT had conducted studies among other things the beach profile, moisture contents of sandy particles, morphology of the eroded beach, intensity, frequency and velocity of the waves”, the Executive Engineer stated.
Of the 480 km long coastline in the State, 39.3 km is under undergoing various degree of sea erosion. The Pentha coast set for geo synthetic tube refurbishment comes under high erosion zone, according to officials.
The Executive Engineer added: “the Ministry of Environment and Forest (MoEF) on the basis of onscreen digitization of coastline and satellite imagery study has pointed out that over one-third of the State shoreline is exposed to varying degrees of sea erosion. Of it, 8.2% is severely hit by sea erosion. That includes Pentha coast”.
“Till the project gets underway, temporary measures like putting up timber stumps, bamboo poles and sand-filled bags have been put in place to tame the advancing sea. However, temporary measures like this in the past have badly failed to arrest the rampaging sea,” Mr. Tripathy remarked.
As per 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 in the Rajnagar tehsil. The sand filled rexin bags would act as protective barrier against tidal waves. It would absorb the tidal ingress, salinity contents and sodium chloride contents in sea water and would stop erosion of the embankment, according to technical experts in Saline Embankment Division.
Several thickly populated human settlements including the coastal Rajnagar block headquarters are presently exposed thoroughly to sea erosion.
Experts are of the view that use of geo-tube would be a better erosion proof mechanism, as it would reduce striking force of the mighty sea waves. While the stone walls and breakwater systems are used to cave in by being battered by waves, the geo-tubes could sustain such shocks. Besides, it has been found that the sea wall or the breakwater system often diverts the erosion trend to other vulnerable shoreline.
Indian Institute of Technology, Chennai, has accorded the go-ahead to the much-awaited sea-erosion-control project after its experts had conducted wide-ranging scientific and morphological study of the vulnerable sea coast.
“It has submitted its findings in a comprehensive report. The premier institute has also approved the technical design and plan of the anti-sea-erosion project at Pentha in Rajnagar tehsil. Tender bid of the Rs. 22-crore project is being invited. We are hopeful that the project work would start this winter”, Mr. Jugal Kishore Tripathy, Executive Engineer, Saline Embankment Division, has said.
The sea wall, where the geo-tube barrier would be installed, is to be erected at an estimated cost Rs. 22 crores. The embankment height would run up to 7.4 metres. The tidal surge rises up to 5 metres during cyclonic storm. Thus it could withstand the ingress of tidal waves. The length of the embankment would be 675 metres instead of 700 metres as was planned earlier, he informed this reporter.
IIT experts had conducted comprehensive scientific study of the erosion prone coast for the installation of geo-tube sea wall to save a cluster of highly threatened hamlets in the district.
The oceanographic experts deputed by the Chennai IIT had conducted studies among other things the beach profile, moisture contents of sandy particles, morphology of the eroded beach, intensity, frequency and velocity of the waves”, the Executive Engineer stated.
Of the 480 km long coastline in the State, 39.3 km is under undergoing various degree of sea erosion. The Pentha coast set for geo synthetic tube refurbishment comes under high erosion zone, according to officials.
The Executive Engineer added: “the Ministry of Environment and Forest (MoEF) on the basis of onscreen digitization of coastline and satellite imagery study has pointed out that over one-third of the State shoreline is exposed to varying degrees of sea erosion. Of it, 8.2% is severely hit by sea erosion. That includes Pentha coast”.
“Till the project gets underway, temporary measures like putting up timber stumps, bamboo poles and sand-filled bags have been put in place to tame the advancing sea. However, temporary measures like this in the past have badly failed to arrest the rampaging sea,” Mr. Tripathy remarked.
As per 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 in the Rajnagar tehsil. The sand filled rexin bags would act as protective barrier against tidal waves. It would absorb the tidal ingress, salinity contents and sodium chloride contents in sea water and would stop erosion of the embankment, according to technical experts in Saline Embankment Division.
Several thickly populated human settlements including the coastal Rajnagar block headquarters are presently exposed thoroughly to sea erosion.
Experts are of the view that use of geo-tube would be a better erosion proof mechanism, as it would reduce striking force of the mighty sea waves. While the stone walls and breakwater systems are used to cave in by being battered by waves, the geo-tubes could sustain such shocks. Besides, it has been found that the sea wall or the breakwater system often diverts the erosion trend to other vulnerable shoreline.
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