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Geography of Pondicherry

The geography of Pondicherry is the same as that of coastal Tamil Nadu. Pondicherry's average elevation is at sea level, and a number of sea inlets, referred to as "backwaters" can be found.

Pondicherry experiences coastal erosion. The city is protected against the sea by a 1.25 mile (2-kilometre) long seawall, first completed by the French in 1735, which reaches a height of 27 feet above sea level.[1] A weather-beaten cement plaque with the year 1952 is still visible along a section of the seawall. The seawall is protected from the direct onslaught of waves by rows of granite boulders which are reinforced every year to stop erosion. Whenever gaps appear or the stones sink into the sand, the Government adds more boulders to keep it strong.....wikipedia