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Arid Karnataka can’t just ‘bank’ on its rivers

Published : May 31, 2019, 2:37 am IST
Updated : May 31, 2019, 7:02 am IST

The choice of crops, the techniques of cropping and so on should get more and more water-smart over time.

Yettinahole Project
 Yettinahole Project

The politically-backed Yettinahole river diversion project has just received the NGT nod, much to the ire of the greens. The river, which belongs solely to Karnataka, comes with its own environmental imperatives but drinking water is in short supply. As for the state’s other river, the Cauvery, 8% of supply goes to meet our drinking water needs, but agriculture remains the largest consumer, using up to 65%.. More sustainable farming methods, better utilisation of the city’s lakes and efficient rainwater harvesting will take the pressure off the state’s rivers, say experts. Chandrashekar G. and Aksheev Thakur report.

Ashwin Mahesh
Urban expert

In my view there are four things that can be done to address the problem:
1. Irrigation takes up 65% of the Cauvery water, whereas globally, the share of agriculture in water use in a river basin is in the 20-30% range. This is a huge difference (for comparison, Bengaluru uses four% of the Cauvery water, and all the other towns put together get another 3-4%). If we make agriculture even slightly more efficient in water use, we will not have to worry about drinking water shortages for a long time.

Karnataka should seek, from the Supreme Court and from the Cauvery River Authority, an independently monitored process by which agriculture in the basin of the Cauvery – including in our state – is made less dependent on water. The choice of crops, the techniques of cropping and so on should get more and more water-smart over time.

Both sugarcane and rice can be grown with a lot less water than Indian farmers use, but the adoption of techniques like SRI (System of Rice Intensification) has been extremely patchy; there has been some adoption of SRI, but not nearly enough. The extension services that the government operates are most defunct, and may as well be closed down. That money can instead be given to organisations that are committed to soil health, improved livelihoods for farming, innovations, and such things.

2. The Centre should fund a massive overhaul of water infrastructure in the metropolitan Bengaluru region, which currently gets about four per cent of the river’s water. This scheme should have three aims – one, to plug all leaks in BWSSB’s creaking infrastructure, which today results in the loss of nearly 20-30% of piped water; second, putting at least 40% of all Cauvery-sourced water to multiple uses through dual piping in homes and offices; and third, the establishment of more nimble infrastructure to source water for the city from the 300-odd lakes in and around it.

A scheme like this will double the piped water supply in Bengaluru. It will also have the effect of infusing some financial and technological life to the moribund BWSSB, which today operates like an unscientific infrastructure company rather than an intelligent manager of water resources.

3. We have to rethink the role and location of reservoirs, and of hydro-electric power generation in both states from such storage. The long-delayed proposal to establish more reservoirs along the river – two in Karnataka and two in Tamil Nadu – should be taken up in earnest. Additional storage points on the river will allow a more geographically concentrated distribution of water for sub-basin needs, and also provide greater storage to meet water needs during lean periods.

In parallel, there should also be a sincere effort to restore the flow in the many tributaries of the river. The long-overdue de-silting of all reservoirs should also be taken up – This can quickly raise the storage in the existing reservoirs.

Power sources can be substituted, but water is needed as it is. It only makes sense, therefore, to use water in the reservoirs to generate electricity if there is no supply weakness for the water. When the water itself is scarce, there is not much point in trying to balance the two competing uses. This problem exists in the management of nearly all the rivers of India, not just Cauvery.

With Koodankulam now operational, some of this should reduce. It would be wiser to raise Tamil Nadu’s allocation from the nuclear plant by this amount, and have better control of the reservoir waters for irrigation purposes only.

Karnataka has a much higher dependence on hydel, but here too a policy of prioritising water supply over power supply can be established for such facilities. Our state too could get a higher allocation from Koodan kulam, under such an approach.

4. The current approach to weather forecasting is inadequate. In India, we have got used to season-long forecasts, and some ambiguous effort to guide farmers’ planting decisions using these. That program needs to be consigned to the dustbin, and replaced with something more dynamic and more accountable for results. Week-by-week, sub-regional assessments have to be developed. The consequences of neglecting this are evident, but as with so many other things in the country, the diligent and much-needed alternative has not been considered seriously enough.

It is time we stopped trying to ‘decide’ the answers to large questions, assuming that good outcomes will flow from that. In many complex problems, in fact, the opposite is true – we must enable the emergence of the right macro design by pursuing smaller, specific outcomes that add up. That will not help answer the immediate problem facing the two states, but it will surely help ensure that the problem doesn’t visit us again and again.

Yettinahole won’t quench thirst but will destroy environment
The National Green Tribunal's decision to allow the Yettinahole river diversion project to go-ahead, has the greens in a predictable rage. However, the move has found the support of two major political parties - the BJP and the Congress. The project proposes the diversion of water from Yettinahole to Ramanagara, Kolar, Chikkaballapura, Hassan and Bengaluru rural districts.

The Yettinahole project could lead to serious environmental concerns, says a 2015 report from the Indian Institute of Science.  The report, titled, Environment Flow Assessment in Yettinahole: Where is 24 TMC to divert, has been authored by Dr T.V. Ramachandra, Vinay S and Bharath H. Aithal. The report says that the project, if implemented, would deprive the local people of their right to water under Article 21 of the Constitution of India.

“Yettinahole diversion project will not help either the people living in arid regions in Karnataka (Chikballapur, Kolar, Tumkur) or local people in Gundia river basin. Those who reside around the Yettinahole catchment would be deprived of their right to water, while people in the arid regions would only get to see dry canals, etc. Implementation of the project would lead to water scarcity in Hassan and Mangalore, and will not benefit Chikkballapur, Kolar, etc. Livelihood of those living around the Yettinahole and Gundia catchments would be severely affected due to a decrease in agricultural and fisheries yield, similar to the residents of Nellore district with the implementation of  Telugu-Ganga project.”

According to the 2015 report by the High Level Working Group in Western Ghats (HLWG), Yettinahole falls under the Ecological Sensitive Zone (ESZ) and as per the recommendations there shall be no developmental activities.

Kshitij Urs, faculty at the National Law School of India University, Bangalore, says the NGT has not lived up to the true spirit of the Act. The Yettinahole project is a shining example of how they have gone wrong. The Supreme Court must stop the project and the petitioners have made it clear that they will appeal at the apex court.”

Tags: cauvery river, supreme court