Environmental Sciences, asked by Sikhabaruah910, 1 year ago

environmental problems of boko, assam

Answers

Answered by 34545

Hazards. A Hazard is a situation which poses a level of threat to life, health, property orenvironment. ... The state of Assam experiences perennial floods, river bank erosion, landslide and other environmental catastrophes.

34545: Natural Hazards:
· Earthquake
· Flood
· Landslides

34545: Earthquake:

34545: Earthquakes in India are caused by the collision of the Indian Plate with the Eurasian Plate in the north. Every year the Indian Plate moves roughly 5 centimeters northward, pushing under the Eurasian Plate and forming the Himalayas and other great mountain chains in the northern part of the Indian peninsula.

34545: For great earthquakes the movement can be several meters and can covers several hundreds of square kilometers of the contact surface between the two plates. Most earthquakes in the northern part of the Indian Sub-continent are a result of this complex process.

34545: Earthquakes which occur at the margins of plates (or plate boundaries) are known as inter-plate earthquakes and account for 95% of the global seismic activity annually.

34545: The North-eastern region of India is an earthquake prone area. The region has experienced a large number of earthquakes of tectonic origin.

34545: The risk probabilities of earthquake are less over the entire Brahmaputra valley. The region of Northeast India is seismically very active. Two major earthquakes of magnitude 8.7 occurred in 1897 and magnitude 8.6 in 1950 causing large scale damage of lives and properties in this region. Sir Edward Gait (1933) has mentioned about the occurrence of destructive earthquakes in this region in 1548, 1596, 1607, 1642, 1663, 1696-1714, 1869, 1882, and in 1897

34545: In the present century, destructive earthquakes occurred in 1918, 1923, 1930, 1932, 1938, 1943, 1947, 1950 and in 1988.

34545: Much of Assam lies in the Brahmaputra River Valley, except for a few southern districts. The northern and eastern parts of this valley are bounded by the Himalayan Frontal Thrust (HFF). In the eastern parts along with the HFF, there is the Lohit and Naga Thrusts. Among the large earthquakes in this region were the events in 1869 and 1897. The 1897 earthquake is well known for the dramatic accounts of violent upthrow during the shock.

34545: know more: http://asmenvis.nic.in/Database/Hazards_840.aspx

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