The myth of water scarcity in India was shattered a few weeks ago, when the Central Water Commission (CWC) finally released a report that was kept under wraps for some time (Reassessment of water available in India using space inputs; Basin Planning & Management Organisation, Central Water Commission, New Delhi, October 2017).
It was jointly brought out by the CWC and ISRO (Indian Space Research Organisation), which began using detailed space imaging techniques over a 30-year period. On the basis of this finding, they have re-assessed the water availability in the six major (actually all the 28) river basins of India. This study effectively covers the whole country except a few islands in the Lakshaweep and Andaman & Nicobar regions.
The study was submitted to the government in October 2017 but was released only a couple of weeks ago. It shows that India may be stressed for water, but it does not suffer from water scarcity.
The findings corroborate to some extent an earlier report in this series, which pointed out that India is blessed with the largest amount of water (in terms of water as a percentage of land mass) compared to most other Asian countries.
What India has done over the past several decades – government after successive government – is to look at this gift horse in the mouth. It has allowed water to be misused and even abused.
There is adequate water
The recently-released report confirms the estimates that had been made by the CWC all along – but like most other reports, these, too, were seriously disputed by the Niti Aayog (and even the Planning Commission). It would appear that stories about water scarcity could spawn several water-related businesses (including desalination, which we shall cover later) that would suit several vested interests. Incidentally, it may be noted that even though the key report is now out in the public domain, the working papers of each river basin have not yet been released, even though they have been prepared.
First let us look at the broad water availability in the river basis
As the report itself points out, “There are variations in water availability in individual basins, but overall change being only an increase of 42.97 BCM (or billion cubic metres – each cubic metre has 1,000 litres). However, if contribution of Teesta Basin (22.93 BCM) is added to the 1993 study, the difference between the two studies is reduced to 20.04 BCM only. Therefore, it may be concluded that the present study corroborates the 1993 study. However, since the present study is based on the most advanced methodology, it generates more confidence in the results achieved.”
Broadly, India has six well-defined river systems. A river basin, also called catchment area of the river, is from where the rain will flow into that particular river. The shape and size of the river basin is determined by the topography. The six are
Indus system
Ganga-Brahmaputra-Meghna system
Rivers of Rajasthan and Gujarat
East Flowing Peninsular Rivers (Damodar, Mahanadi, Brahmani, Baitarani, Subarnarekha, Krishna, Godavari and Cauvery
West Flowing Peninsular Rivers Narmada and Tapi
Western Coast Rivers There are large number of rivers in the Western Coast - i.e. coastal Maharashtra and Karnataka, and entire Kerala. These rivers are small in length but carry a significant amount of water due to very high rainfall in Western Ghats. They drain only 3 percent of India’s land area but carry 11 percent of India’s water resources.
What makes the report most relevant is that it looks at India’s growing population, and recognises that the sheer numbers may result in water stress, but not water scarcity.
It also recognises the fact that as people become more affluent, their dependence on cereals will decline, and their need for more nutrition is bound to increase. Yet, in spite of this awareness, successive governments have pandered to the wheat and rice growing farmers (who also happen to be politically well-connected). Add to this two other crops which are politically favoured – sugarcane and cotton. Interestingly, these four crops are one ones that enjoy a profit margin of 50 percent on market (or procurement) prices.
It could be said that these are also crops that cause water stress to become more severe.
In the case of sugar, they use up water, and the surplus sugar is sold overseas at a discount, thus hurting the country doubly. Ditto with rice and wheat. The surplus is sold at a discount to markets overseas.