In troubled waters - The Glacier Meltdown.
Recently there were lots of discussion about the interlinking of rivers in India. Many people - politicians and scholars alike - argue that it the best way to save the drought ridden and seasonal rainfall dependent south. Though the project need details study of environmental damages and possible relocation of tens of thousands of people from their homes and resulting outcome, looks like it might have run into rough weather even before it's started. Recent study by British group - UK's Department of International Development (DFID) project called SAGARMATHA (Snow and glacier Aspects of Water Resources Management in the Himalayas) - say the glacier feeding these north Indian rivers are melting and melting fast.
Some of the key finding are:
1. In the Upper Indus, the study sites show initial increases of 14 and 90 per cent in mean flows over the next few decades which will be followed by decreasing flows by 30 and 90 per cent of baseline in the subsequent decades of the 100-year scenario.
2. For Ganges, the response of the river near the glacier in Uttarkashi is different from downstream Allahabad. At Uttarkashi, flows peak at between 20 and 33 per cent baseline within the first two decades and then recede to 50 per cent of base line after 50 years.
3. Near the Brahmaputra source, there is general decrease in decadal mean flows for all temperature scenarios as glaciers are few in the area and flows recede as the permanent snow cover reduces with increasing temperature.
4. The catchment in the East Himalayas, which benefit from high precipitation of the summer monsoon every year, are less vulnerable to impacts of deglaciation than those in the West, where the monsoon is weaker.