Thursday, March 31, 2011

Cherrapunji

Cherapunji in India famous for highest rainfall in the world.The original name for this town was Sohra, pronounced as "Churra" by the British before morphing into the present one. Despite perennial rain, Cherrapunji faces an acute water shortage and the inhabitants often have to trek for miles to obtain potable water. Irrigation is also hampered due to excessive rain washing away the topsoil as a result of human encroachment into the forests. Now the Meghalaya State government has decided to rename Cherrapunjee to its local name "Sochra".


Cherrapunjee receives rains from the Bay of Bengal arm of the Indian summer Monsoon. The monsoon clouds fly unhindered over the plains of Bangladesh for about 400 km. Thereafter, they hit the Khasi Hills which abruptly rise out of the plains to reach a height of about 1370 m above mean sea level within of 2 to 5 km. The geography of the hills with many deep valleys channels the low-flying (150–300 m) moisture-laden clouds from a wide area to converge over Cherrapunji. 


The winds push the rain clouds through these gorges and up the steep slopes. The rapid ascent of the clouds into the upper atmosphere hastens the cooling and helps vapours to condense. Most of Cherrapunji's rain is the result of air being lifted as a large body of water vapour. The extremely large amount of rainfall at Cherrapunji is perhaps the best-known feature of orographic rain in northeast India.