Tuesday, March 14, 2006

March 16, 2006

Mumbai’s Geography

Mumbai is located on Salsette Island which lies at the mouth of Ulhas River off the western coast of India in the coastal region known as the Konkan. Most of Mumbai is at sea level and the average elevation ranges from 33 to 49.5 feet (10 to 15 meters). The northern part of Mumbai is hilly and the highest point of the city is at 1,450 feet (450 meters). Within the metropolitan limits are present three lakes: the Tulsi Lake, Vihar Lake and the Powai Lake. The first two are present within the Borivali National Park and supply part of the city’s drinking water. Mumbai also has three small rivers within the city limits originating in the National Park. The coastline of the city is indented with numerous creeks and bays. On the eastern seaboard, large mangrove swamps rich in biodiversity occupy most of the region. Soil cover in the city region is predominantly sandy owing to its proximity to the sea. The underlying rock of the region is composed of black Deccan basalt flows and their acid and basic variants dating back to the late Cretaceous and early Eocene geological eras. Mumbai sits on a seismically active zone owing to the presence of three fault lines in the vicinity. The area is classified as a Zone III region, which means an earthquake of magnitude of up to 6.5 can be expected.

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