Carrying water by trains could be an emergency measure. Chennai has a strong tradition of water harvesting. But the problem is that most of these structures are either defunct or poorly maintained. Chennai which had 19 major lakes covering an area of 1130 hectares. But these waterbodies have been heavily encroached upon reducing their spread to just about 645 hectares. Its time that we understand the importance of water harvesting.

When the rain gods do not send water for irrigation, farmers look downwards, at groundwater, for help. But, years of groundwater exploitation and lack of recharging, has led to a fall in the water tables. For instance, in north and central Gujarat, water tables have dropped to 20m per decade since 1974, as per a study by the Central Ground Water Board. If this continues, extracting groundwater will get more expensive because we have to dig deeper, or worse, groundwater will be only a myth for future generations.

Why is the Indian monsoon so slippery? The monsoon of the Indian subcontinent is also shaped by the heating of the Tibetan plateau, the shape of continents and mountains, Eurasian snow cover, temperature difference between eastern and western flanks of the Indian ocean, and, arguably the most important, El Niño (“little boy” in Spanish as this event occurs around Christmas), a weather event triggered by a greater heating of the eastern Pacific near Ecuador than its western counterpart. A strong El Niño, more often than not, implies a weak monsoon. In the last 100 years, 19 out of 43 deficient monsoon years were …