Muddy questions about Mullaperiyar dam

A purely technical matter has turned into an emotional and political issue between Kerala and Tamil Nadu. The entire fight is centred on whether the water level in the Mullaperiyar reservoir should be raised by two meters.

The Hindu : Opinion / Op-Ed : Muddy questions about Mullaperiyar dam: "The silt building up in the reservoir cannot be ignored for any decision on the dispute."


In any dam, silting - a natural hydrological and sedimentological process by which sediments flowing from the upstream catchment area in the river water get deposited in the reservoir -  reduces the life of a reservoir as well as its storing capacity. The cumulative accumulation of silt in the reservoir is not dangerous to the stability of the dam as it does not exert any dynamic pressure on the body of the dam.

With the passage of time, due to siltation, the storing capacity and consequentially the availability of water will  continue to decrease and the demand to raise the water level would crop up again.  If any decision is taken ignoring the silting of the reservoir, that decision is certainly not going to solve the Mullaperiyar problem.

A river sutra, without links

"There are less disruptive and cheaper alternatives than connecting rivers to reduce the misery of floods and droughts."

As plans for inter-basin transfers of water across vast distances, from surplus to deficit areas, appear to have got a lot of attraction for a country exposed all too often to droughts and floods, these need to be seriously evaluated and debated. The Hindu : Opinion / Op-Ed : A river sutra, without links


In practice, people in so-called surplus areas do not agree that they have spare water which can be transferred to other, faraway areas. At a time when there are problems relating to the sharing of waters, transfer of water across distant areas can easily aggravate these tensions. This should be avoided.

Also, any neat division between "deficit" and "surplus" areas becomes more of a problem in these times of climate change when erratic weather patterns are more frequently seen. The tensions are likely to be much greater when inter-basin transfers also involve neighbouring countries. Given the real world of shifting rivers, land slides, seismic belts, etc. it makes the task difficult, enormously expensive, energy-intensive and hazardous. We also have not explored how the bio-diversity flourishing in a particular river system will react when it is linked to another river.

A combination of traditional water-collection/conservation practices and other drought-proofing methods — which also use modern technology — still provides the best available answer (also the cheapest one) to water scarcity in drought-prone areas. A good drainage plan — so that flood water clears quickly — combined with a package of livelihood, health, education and other support suited to the needs of flood-prone areas and communities is what is really needed.

Chasing a mirage

"The Supreme Court direction to the Centre to constitute a special committee to pursue the outdated plan of linking India's rivers is based on a misplaced premise. "

The Hindu : Opinion / Editorial : Chasing a mirage: The national record on resettlement of people displaced by mega dam projects does not inspire confidence. As importantly, the plan's environmental aspects or cost-benefit calculus have not been considered. There is the additional challenge of taking along states let alone neighbouring countries.

The way forward to improve the prospects of water-deficit basins is to work on more efficient and less destructive options, like devoting resources for rainwater harvesting programmes of scale, raising irrigation efficiency, curbing pollution.

Government must link rivers without any delay

The editorial urges the government to take affirmative action based on the Supreme Court decision to interlink rivers.

http://expressbuzz.com/opinion/editorials/government-must-link-rivers-without-any-delay/367607.html

‘Periyar is an inter-State river'

The Hindu : Opinion / Op-Ed : ‘Periyar is an inter-State river':

A reply to rejoinders by Ramaswamy R. Iyer and N.K. Premachandran.

"When it comes to “rights,” Tamil Nadu has the right to maintain the dam and also draw water under the lease agreement"

The case for a new Mullaperiyar dam

The Hindu : Opinion / Op-Ed : The case for a new Mullaperiyar dam

"The existing dam is unsafe. There is ample scope for Kerala to invoke the ‘precautionary principle of action' in order to protect its people."

'Safety will benefit Tamil Nadu'

The Hindu : Opinion / Op-Ed : 'Safety will benefit Tamil Nadu':

"A response to Durai Murugan's article “Unwarranted fears on Mullaiperiyar.”"