Born and brought up in a village on the bank of Buckingham Canal, imaging a water stressed region was difficult. This McKinsey report is disturbing as the bridging measure appear in-feasible.
By 2030, under an average economic growth scenario and if no efficiency gains are assumed, global water requirements would grow from 4,500 billion m3 today (or 4.5 thousand cubic kilometers) to 6,900 billion m3. This is a full 40 percent above current accessible, reliable supply (including return flows, and taking into account that a portion of supply should be reserved for environmental requirements ). By 2030, demand in India will grow to almost 1.5 trillion m3, driven by domestic demand for rice, wheat, and sugar for a growing population, a large proportion of which is moving toward a middle-class diet. Against this demand, India’s current water supply is approximately 740 billion m3. As a result, most of India’s river basins could face severe deficit by 2030 unless concerted action is taken, with some of the most populous—including the Ganga, the Krishna, and the Indian portion of the Indus—facing the biggest absolute gap. The report lists many measures to reduce demand and increase supply.