Geography of Bangladesh
The Bangladesh, located at the north of the Bay of Bengal, almost wedged in the India with a small common border with the Myanmar, extends on 440 km from is in west and of 760 km of north-western north in the south-eastern south. Its surface of 147.570 km ² is similar to that of Greece.
Physical geography of Bangladesh
Climate
Climate of Bangladesh east of the tropical type with one soft winter from October at March, a hot and wet summer from March to June, and Monsoon S from June to October. Natural disasters, such as the floods, the tropical Cyclone S, the Tornado S, and the Raz-de-marée (Tsunami S) touch the country practically every year. The Cyclone S and the Mousson can involve serious floods every year.The hottest months are from March to May. Monsoon extends from June to October. From November to February place has one dry winter.
the distress of Bangladesh is explained by its geographical location . Diverted towards the east by the collision of the Tectonic plates Indian and Chinese, the rivers which go down from the the Himalayas and the Plateau Tibetan throw all in the Bay of Bengal, squaring a country-delta of 147.570 km ², dish, rainy and muddy, at the thank you of believed and Cyclones. In this state, 80% of precipitations fall during the 5 months from the Mousson (from June to October), whereas 20% only of the grounds are protected from the floods and are equipped with drainage and irrigation.
EXPLANATIONS:
1. A PHENOMENAL MONSOON : Overheated when the sun comes to the zenith from the tropic, the Indian Ocean evaporates. The humid air, hot and light, goes up. A wind of south-west, blowing from May to October, brings the Mousson which sprinkles the Indian Péninsule and covers with snow the Himalayas. Bangladesh receives in 5 months 80% of annual precipitations (1,5 to 6 meters). The flood reaches 12 meters per annum (20 times more than at Paris) at the border, in the hills of the Assam.
2. THREE RIVERS SURPUISSANTS: Wire of monsoon and the Himalayan glaciers, the Gange and the Brahmapoutra drain; with the Meghna, a mountainous and softened basin of 1,5 million km ². But, diverted towards the east by the crumpling of the Himalayas, they throw all in the Bay of Bengal, through a country ultraplat and 12 times smaller. The summer, when the rains of monsoon are added to the snow melt (April-May), their cumulated flow (80 times the the Seine into raw) exceeds that of the the Amazon (150 000 m ³ at the second).
3. A FLAT COUNTRY OF THE SILT: Entered in Bangladesh with 22,5 meters of altitude, the giant rivers have 450 more km to traverse, on quasi null slopes: 0,005 per thousand… Their beds are thus spread out regularly over a fifth at least country. Their Alluvion S torn off with the roof of the world (2 billion tons per annum) reaches sometimes 2 000 meters thickness and make the substance even of Bangladesh gained on the sea. In the rivers and the gulf, they form " chars" , islands of vase as unstable as fertile. Hardly emerged, they are cultivated, then inhabited by a population in lack of grounds (200 with 2 500 inhabitants with the km ²) and exposed at worst the dangers.
4. The STILL HIGH HIMALAYAS: The Himalayas, mountains young, assemble few millimetres per annum. From where a maximum erosion. The seisms cause there landslides which block the rivers. The terrestrial warming increases the cast iron of the glaciers. On the Indian and Nepalese slopes, the deforestation accelerates the rush of water and erosion. Raised on a mattress of sediments, the rivers flood the low grounds.
5. HEAT INFLATES the OCEAN: Water goes up a little because of the cast iron of the polar ices, but also because heat dilates them. The surface of the Indian Ocean where the temperature exceeds 27°C, that which supports the cyclones, increased by 30% in 30 years, underline certain experts. Just as tropical depressions, the cyclones make assemble the sea and can thus make ebb the risings of the rivers upstream.
Political geography of Bangladesh
Bangladesh is composed of six divisions, Râjshâhî, Dhâkâ, Sylhet, Khulnâ, Barisâl and Chittagong