Bhutan has four major river systems flowing swiftly out of the Himalayas that are regularly fed by glaciers in northern Bhutan.
Bhutan is a landlocked South Asian country. Covering an area of around 46,500 square kilometers and has population of 650,000 with seventy five percent of the population living on cultivation and livestock rearing.
Bhutan's climate is as varied as its altitudes and, like most of Asia, is affected by monsoons. Western Bhutan is particularly affected by monsoons that bring between 60 and 90 percent of the region's rainfall.