Informatics Publishing Limited

S. M. Ramasamy ¹, J. Saravanavel ¹, R. Selvakumar ¹

Affiliations
1 Centre for Remote Sensing, School of Geosciences, Bharathidasan University, Tiruchirappalli - 620 023, IN

Abstract

The Cauvery delta is a major Bird-Root shaped delta with its apex located east of Tiruchirappalli with the mother channel Cauvery flowing along Thanjavur- Kumbakonam - Kaveripoompaitinam. The distributary drainages are radialing over an arc towards east from its apex with a fan shape and finally debouch into the sea from south of Tiruthuraipoondi in the south to Kaveripoompattinam in the north. All these distributary drainages are now seen as palaeochannels including the mother channel Cauvery. which is now called as "Palam Cauvery". The present day flow of Callvery river is confined to the northernmost rim of the delta as river Coleroon. On he basis of the archaeological, epigraphic and historical data analysed earlier and the ¹⁴C dating carried out recently, the present authors infer that the age of the delta may vary from 2300 Y.B.P. (Years Before Present) to 750 Y.B.P. and the age of the palaeochannels are also younging from 2300 Y.B.P. in the south to 750 Y.B.P. in the north. In the southern part of the Cauvery delta, the Mio-Pliocene Sandstone of Pattukottai-Mannargudi area is undergoing upliftment along N-S faults. On the basis of the rapid land progradation during 6085±233 Y.B.P. - 1020±80 Y.B.P. in Vedaranniyam coast, it is visualized that the Mio-Pliocene Sandstone must be undergoing upliftlnenl significantly since 6 100 Y.B.P. onwards. On the basis of the occurrence of older palaeochannels in the south, the gradual younging palaeochannels towards the north and the land emergence in the south of the Cauvery delta in Pattukottai - Mannatgudi area, i t is concluded that the distributary drainages of river Cauvery would have become sequentially defunct/shifted from south to north and linally the mother channel Cauvery also would have been pushed towards north to reach the present tract of Coleroon river. The thinner palaeochannels in the south and the gradual wider palaeochannels in the north of the delta further indicate that as the land was already undergoing emergence in the south even before the river Cauvery had entered into Thanjavur plains, the river could not comfortably spread its distributaries in the south. Hence the southern distributaries, alter a brief flow, would have started drying sequentially from south to north during 2300-750 Y.B.P. thereby the floodwater of each of the southern distributary channel would have been pushed to its successive northern counterpart, i.e. the southern distributary (say 1 ) , pushing its water to its immediate northern counterparl (say 2). then the combined flow of 1 and 2 pushing the water to 3 and so on. The anomalous eyed drainage and its modifications during the last 50-60 years and compressed meanders in Coleroon river. deflected drainages in Palam Cauvery, truncation and punctuation of beach ridges by the E-W faults along the N-S coast and such faults acting as pathways for the sub parallel creeks indicate vibrant Late Holocenc geological history predominated by the tectonic movements in Cauvery delta.

Keywords

Remote Sensing, Geomorphic Anomalies, Post Deltaic Geological Events, Late Holocene Tectonics of Cauvery Delta.

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S. M. Ramasamy ¹, C. J. Kumanan ¹, J. Saravanavel ¹, R. Selvakumar ¹

Affiliations
1 Centre for Remote Sensing, School of Geosciences, Bharathidasan University, Tiruchirappalli-620 023, IN

Abstract

The recent disastrous tsunami of December 26, 2004, has not only alarmed the administrative and the planning machinery to have tsunami mitigation strategies for India, but also signalled the geoscientists to have a deeper look on the phenomenon of tsunami and the vulnerabilities of the Indian coasts. In this context, the authors have conducted a study primarily to evaluate the responses of the coastal geosystems to the tsunami mundations, as it is a very vital component in framing strategies for mitigating the effect of tsunami. The study has revealed that the central coastal parts of Tamil Nadu, namely Cuddalore-Nagapattinam districts, which were worst affected by the recent tsunami, expose a combination of landforms of tectonic, fluvial, fluvio-Marine and marine processes. These different landforms have responded differently to the recent tsunami viz as facilitators, carriers, accommodators, absorbers, barriers etc. On the basis of the same, different eco-Friendly, cost effective and result oriented methods are suggested to mitigate the effects of tsunamis.

Keywords

Coastal Tectonics and Geomorphology, Tsunami Mitigation, Tamil Nadu.

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R. Selvakumar ¹, S. Aravindh ¹, J. Ravichandran ², U. Kamachi Mudali ³, C. Anandbabu ⁴, Baldev Raj ⁵

Affiliations
1 Nanobiotechnology Laboratory, Nanotech Research Facility, PSG Institute of Advanced Studies, Peelamedu, Coimbatore 641 004, IN
2 Department of Chemistry, PSG College of Technology, Peelamedu, Coimbatore 641 004, IN
3 Corrosion Science and Technology Group, Corrosion Science and Technology Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, IN
4 Department of Biotechnology, PSG College of Technology, Peelamedu, Coimbatore 641 004, IN
5 PSG Institutions, Peelamedu, Coimbatore 641 004, IN

Abstract

In the present study, bioceramic was prepared by impregnating surface layer protein (S-layer) isolated from extremophilic bacteria Bacillus licheniformis NARW 02 onto sol-gel-derived titanium phosphate (TiP) ceramic. The prepared bioceramic was used for adsorption of uranium ions from aqueous solution and compared with control lacking S-layer protein. The distribution coefficient value of TiP and bioceramic for uranium adsorption was 100.65 and 432.48 ml/g respectively. This study indicates that the bacterial S-layer can be potentially used to enhance the adsorption efficiency of the ceramics used in separation of uranium from waste water.

Keywords

Bacillus licheniformis, Extremophilic Bacteria, Titanium Phosphate Ceramic, Uranium.

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R. Selvakumar ¹, S. Mohamed Saleem ²

Affiliations
1 Department of Computer Science and Engineering, Vinayaka Missions University, Salem, TN, IN
2 VIT Business School, VIT University, Vellore, TN, IN

Abstract

A sensor network can be described as a collection of sensor nodes which co-ordinate with each other to perform some specific function. These sensor nodes are mainly in large numbers and are densely deployed either inside the phenomenon or very close to it. They can be used for various application areas (e.g. health, military, home). Failures are inevitable in wireless sensor networks due to inhospitable environment and unattended deployment. Therefore, it is necessary that network failures are detected in advance and appropriate measures are taken to sustain network operation. We previously proposed a cellular approach for fault detection and recovery. In this paper we extend the cellular approach and propose a new fault management mechanism to deal with fault detection and recovery. We propose a hierarchical structure to properly distribute fault management tasks among sensor nodes by introducing more „self-managing‟ functions. The proposed failure detection and recovery algorithm has been compared with some existing related work and proven to be more energy efficient.

Keywords

Sensor Networks, Fault Management, Fault Detection & Fault Recovery.

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