S. No Location Vulnerable Parameters CVI value Vulnerability Category Remarks GEO SHL SLO SLR MWH MTR 1 Manavai 2 4 5 1 2 4 7.3029 Moderate Sand sheet environment is highly dominated 2 Agastiswaram 2 3 3 1 2 3 4.2426 Low All parameters are equally contributed 3 Muhilankudiyuruppu 3 3 3 1 2 3 5.1961 Low All parameters are equally contributed 4 Cape comorin (Left) 4 4 4 1 2 4 9.2374 High Erosion due to longshore sediment transport action 5 Cape comorin 4 3 4 1 1 2 6.9282 Moderate Moderate erosion due to anthropogenic activity 6 Chinna muttam 3 1 3 1 2 3 3.0000 Very low Rate of accumulation is high (up-drift) 7 Elusattupettu 3 3 2 1 2 3 4.2426 Low Rate of erosion is high 8 Vivekanandapuram 3 4 2 1 2 3 4.8989 Low Rate of erosion is high 9 Visvanarayanapuram 3 5 3 1 2 4 7.7459 Moderate Very high erosion due to mud flats 10 Sundanparappu 2 5 4 1 2 4 7.3029 Moderate Very high erosion due to less slope 11 Kalluvilai(Arokiapuram) 3 5 4 1 2 3 7.7459 Moderate Erosion due to aquaculture 12 Lipuram 3 4 4 1 2 4 8.0000 High Alluvial plain environment 13 Lakshmipuram 4 3 4 1 2 4 8.0000 High Near estuary 14 Vattakottai (Fort) 2 4 3 1 3 4 6.9282 Moderate Erosion due to coastal construction 15 Anjugramam 3 3 4 1 2 3 6.0000 Low Parameters are equally contributed 16 Kootapuli 3 2 4 1 2 4 5.6568 Low Less mean tidal range 17 Chettikulam 4 4 4 1 2 3 8.0000 Moderate Cobble beach and estuary environment 18 Koodankulam 2 5 4 1 2 4 7.3029 Moderate Moderate erosion and deposition due to groins formation 19 Idindakarai (Left) 4 5 3 1 2 4 8.9442 High Erosion environment due to less altitude land surface 20 Idindakarai (Right) 4 5 3 1 3 4 10.9544 Very high High erosion environment due to down-drift process 21 Vijayapathi 4 5 4 1 3 4 12.6491 Very high Very high erosion due to estuary environment and down-drift process

Table 4: Vulnerable zone and significant remarks of each station along the study area.