Bengal - Geography

Geography

Most of the Bengal region is in the low-lying Ganges–Brahmaputra River Delta or Ganges Delta. The Ganges Delta arises from the confluence of the rivers Ganges, Brahmaputra, and Meghna rivers and their respective tributaries. The total area of Bengal is 232,752 km²—West Bengal is 88,752 km2 (34,267 sq mi) and Bangladesh 147,570 km2 (56,977 sq mi).

Most parts of Bangladesh are within 10 meters (33 ft) above the sea level, and it is believed that about 10% of the land would be flooded if the sea level were to rise by 1 metre (3 ft). Because of this low elevation, much of this region is exceptionally vulnerable to seasonal flooding due to monsoons. The highest point in Bangladesh is in Mowdok range at 1,052 metres (3,451 ft) in the Chittagong Hill Tracts to the southeast of the country. A major part of the coastline comprises a marshy jungle, the Sundarbans, the largest mangrove forest in the world and home to diverse flora and fauna, including the Royal Bengal Tiger. In 1997, this region was declared endangered.

West Bengal is on the eastern bottleneck of India, stretching from the Himalayas in the north to the Bay of Bengal in the south. The state has a total area of 88,752 km2 (34,267 sq mi). The Darjeeling Himalayan hill region in the northern extreme of the state belongs to the eastern Himalaya. This region contains Sandakfu (3,636 m (11,929 ft))—the highest peak of the state. The narrow Terai region separates this region from the plains, which in turn transitions into the Ganges delta towards the south. The Rarh region intervenes between the Ganges delta in the east and the western plateau and high lands. A small coastal region is on the extreme south, while the Sundarbans mangrove forests form a remarkable geographical landmark at the Ganges delta.

At least nine districts in West Bengal and 42 districts in Bangladesh have arsenic levels in groundwater above the World Health Organization maximum permissible limit of 50 µg/L (micro gram per litre) or 50 parts per billion and the untreated water is unfit for human consumption. The water causes arsenicosis, cancer of skin and various other complications in the body. Arsenic is four times as poisonous as mercury.