Enayam Port

Tamil Research Institute
RAPID TECHNO-ECONOMIC FEASIBILITY REPORT FOR
DEVELOPMENT OF COLACHEL PORT AT TAMILNADU
FINAL REPORT
• Extreme regime: For preliminary design of main defence structures, mainly breakwaters, a Return Period (Tr) of
200 years has been taken. That is the wave height that occurs, as a mean value, only once each 200 years.
The table summarizes the values for the shallow water control points near the breakwater:
Mean regime
Hs (m)
Extreme regime(200 years)
Hs (m)
Enayam breakwater 2.0 5.0
Table 23: Hs Mean Regime and Extreme Regime
8.2.3. Sea level
The tide levels are shown in the table below:
Sea level Description Value
HAT:
LAT
Highest Astronomical Tide.
The elevation of the highest predicted astronomical tide expected to uccur at
least once a year
Lowest Astronomical Tide.
All heights have been taken above the lowest astronomical tide
Table 24: Tide levels
1.05 m
0.00m
These tidal levels have been obtained from the Databases of astronomical tide, and others heights have been add
over the Highest Astronomical Tide as:
• Meteorological tide :
From the Journal of Coastal Research non-tidal sea level has been obtained. This Professional Paper based
on the sea level data measured at three locations along the nearshore waters of Karnataka, west cost of
India. In conclusion Correlation between alongshore component of wind and non-tidal sea level was 0.54
m at Malpe and 0.48 at Honnavar. A 0.54 m storm surge has been considered.
• Expected Sea Level Rise:
For waterfront structures over the port design life the sea level rise for 50 years is 0.38m according to IPCC
(Intergovernmental Panel on Climate Change , Climate Change 2014 Synthesis Report), the table below
shows the projected change in global mean sea level rise for the mid-and late 21st century:
CP1832-FR-CP-FinalReportRevised-Report-Ed1.docx 126
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