喜马拉雅多泥沙河流上的工程引发警报

Dredging and mining river sediments can raise flood risks and threaten infrastructure, scientists say A n Indian government plan to scour millions of cubic meters of mud and sand from a reservoir in the na- tion’s northern mountains has sparked tensions with nearby Pakistan—and worried scientists, who say the project highlights the risks posed by projects that aim to manage the plentiful river sediments washing from the rugged and rapidly eroding Himalayan region. a mountainous region that is home to some of the world’s highest erosion rates, thanks to fragile geological formations, steep and unstable slopes, intense monsoon rains, and frequent seismic activity. …