Hydrology

Ganga saga part II: redesign dams, not rivers

Engineers require re-training, not the Ganga. This is where I had left our conversation last fortnight. Why did I say this? The inter-ministerial committee I participated in as a member was discussing how much the ecological flow—the water that should be left in the river for ecosystem and livelihood purposes—should be at all times. How much water is needed for the river to be a river; and not a drain?

Training engineers, not Ganga

Hydropower is important. But how important? Is it important enough to dry up stretches of our rivers? Or is there a way to balance the need of energy with the imperative of a flowing, healthy river? I have been grappling with these issues for the past few months. But now that the committee (of which I was a member) on the hydropower projects on the Ganga has submitted its report, let me explain how I see the way ahead.

Look what’s swelling the sea

By:  Bharat Lal Seth

Use of groundwater accounts for 0.8 mm sea level rise

Groundwater is becoming important to sustain agriculture, industry and drinking water. But as we exploit aquifers, more water becomes part of the hydrological cycle. A recent study shows evaporation and precipitation of groundwater is responsible for a fourth of the annual sea level rise of 3.1 mm.