Enayam Port

Tamil Research Institute
RAPID TECHNO-ECONOMIC FEASIBILITY REPORT FOR
DEVELOPMENT OF COLACHEL PORT AT TAMILNADU
FINAL REPORT
Figure 19. Flood Hazard Map of Tamil Nadu and Kerala. Source: BMTPC, 2012.
3.2.3.4. Coastal Erosion in Kanyakumari District
Coastal length of Kanyakumari district along Arabian Sea is 59 km and along Bay of Bengal is 11 km.
Breakwaters like walls & groynes are sea erosion control measures for maintaining seashores.
RMS walls are almost constructed in entire length of sea shore of Kanyakumari district which is comparatively &
densely populated district in Tamilnadu and has valuable lands with roads along shoreline. Walls are rubble
mound flexible breakwater structures tends to settle down continuously due to scouring erosion. Moreover the
stability of interlocking of heavy armour stones have been broken by knocking/impact of huge wave action
during southwest monsoon period (May-September). Non-proper and timely Non–maintenance of RMS Walls
during the past years leads to heavy damages/failures.
Groynes are to prevent heavy erosion indirectly by depositing the beach sand carried by littoral drift parallel to
the seashores (long shore sediment transport.
Figure 20. Breakwaters in projectc area. Source: compiled by author.
CP1832-FR-AX-05-CP-Initial Environmental Examination-Ed4.docx AX05 - 35
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