One of the main issues likely to be discussed during the Bangladesh Prime Minister’s impending  visit to India is the sharing of the Teesta river water. The issue has repeatedly featured in  previous talks, but without any concrete results. This time, can one expect any forward movement?

The Teesta, after originating in Sikkim and passing through West Bengal, enters Bangladesh before it merges into the Brahmaputra at Teestamukh. The river basin has a drainage area of about 12000 square kilometers, of which 83 per cent lies in India. The shortage of irrigation water during the dry season in a year (November-April) is a common feature in this region.

The Teesta barrage, constructed by India about 90 kilometers  upstream of the  Indo-Bangladesh border at Gajaldoba, lies in West Bengal, while Daoni/Dalia barrage constructed by Bangladesh downstream lies about 15 km away  from the international border. Both barrages are meant for irrigation purposes.

Bangladesh’s appeal to share 50 per cent of  the Teesta water dates back to 1972. An ad hoc sharing agreement was reached in July 1983, whereby it was decided to allocate 36 per  cent of  the water to Bangladesh, 39 per cent to India, with the remaining 25 per cent  un-allocated.

The  West Bengal Government has been insisting that the state is unable to share more than 25 per cent of the  water available at Gajaldoba with Bangladesh. It claims that beyond this volume, the upstream areas of the state would be adversely affected.

In 2011, a proposal on interim sharing of water for 15 years was mooted and a process was initiated. This included the arrangement that the lean period flows would be measured jointly at Gajaldoba in West Bengal, at Doani/Dalia in Bangladesh, and at Kaunia in Bangladesh, and that upon collection of the jointly collated data, the 90 per cent dependable flows would be worked out. And this would  form the basis for a long-term agreement.

Further, it was stipulated that 450 cusecs of water would be reserved for environmental flow and the Indian side could utilise 450 cusecs upstream of Gajaldoba barrage for minor irrigation, drinking, industrial purposes etc.

India would release the remaining water from Gajaldoba in such a way that 50 per cent at Gajaldoba barrage would be available at Doani/Dalia barrage as well. This would effectively mean that the West Bengal Government would have to release only 25 per cent of the water available at Gajaldoba barrage, which when added to the 25 per cent of the regenerated water between Gajaldoba and Dalia  would result in receiving life’s essential  equivalent to 50 per cent of water available at Gajaldoba.

The  proposition was not acceptable to West Bengal, as it claimed that the manner of release of water was very vague.  It argued that there could be years when regeneration between Gajaldoba and Dalia would be less than 25 per cent. In such an eventuality, committing 50 per cent share of water at Gajaldoba might affect the state’s important Teesta barrage project, indeed  the largest irrigation project in the eastern region, involving an irrigation potential of 9.22 lakh hectares and 67.5 MW hydro-power.

Because of the difference in perceptions, no agreement was reached during the 2011 and 2015 visits of the Indian Prime Minister  to Bangladesh. Meanwhile, Dhaka has been raising the issue of inadequate availability of the Teesta’s flow  in Bangladesh because the water is yet to be released  by India.

At the core of the dispute is the proposition that there exists an institutional mechanism to look into the flow of  “water data” at critical points. In this case, the technical wing of the Indo-Bangaladesh Joint River Commission (JRC) does the same at Gajaldoba barrage and Dalia barrage, and exchanges the data among the parties.

Since there are different agencies which collect the flow data, these do not often match. There is need for a common protocol for data collection by designated agencies. And the facts and figures must be acceptable to both  parties.

Bangladesh being a lower riparian country is hugely dependent on external sources of water  ~ to the extent of 90 per cent. A fair share of  this volume comes from India. Bangladesh also faces the problem of  ground-water depletion as well as contamination, as does India. Being a single hydrological unit, surface water and ground water have a symbiotic relationship.

Rather than concentrate on river water alone, the common objective should consider integrated watershed management, combining both types of water. In addition, basin level water management should be considered, as part of broader cooperation, since the Teesta basin is a sub-basin of the greater Ganga, Brahmaputra and Meghna basins.

The Teesta river is a highly emotive issue on both sides of the border. There is need for interaction at the level of experts outside the Governments from both countries to demystify the issue, and for the flow-back of suggestions to the respective Governments. This unofficial channel of sharing of information is likely to build confidence between the two neighbours.

The existing institutional mechanism such as JRC should be utilised vigorously. There are some periods when no meetings of JRC  were convened, for example in 2013 when the flow data became a contentious issue.

Geopolitically, Bangladesh ia anxious to resolve the Teesta issue before the next general election. It has been pending for the past  40 years. India being a ‘big brother’ in the region wants to resolve the issue, considering its priority of the “Act East Policy and for countering  China’s proximity”. It is imperative to bring West Bengal to the drawing board for resolution, and to convince the state government of the mutual benefit of the water sharing arrangement.

At this juncture, the way forward is to convince Bangladesh  of the sincerity of India’s  intention to seek a mutually beneficial formula, and for this, to resume the sharing of genuine data on sharing. The JRC mechanism must be sincerely utilised. Simultaneously, a national consensus has to be built up within India on the  importance of friendship with the  neighbour through equitable sharing of water.

The writer is a former Secretary, Ministry of Water Resources, and now Director, Water Resources, The Energy and Resources Institute (TERI), New Delhi.