The drop in cumulative water storage across 74 major reservoirs under the Irrigation Department to approximately 37 per cent of total capacity provides evidence of an escalating climate and governance crisis.
In the agricultural heartlands of the Dry Zone, particularly in Ampara, water levels in nine major reservoirs have fallen to roughly 23 per cent, whereas four key reservoirs in Batticaloa stand at 26 per cent, and primary storage bodies in Trincomalee sit at 28 per cent. Major agricultural centres such as Polonnaruwa and Hambantota report depleted storage of 42 per cent and 43 per cent respectively.
Compounding this severe hydrological deficit, the Meteorological Department has warned of caution-level heat indices between 39°C and 45°C across eastern and northern districts, accelerating surface evaporation from already depleted water bodies. The practical consequences are immediate and devastating. In Hingurakgoda, the complete desiccation of the Kithuluthuwa tank has left 50 farming families without water and ruined over 50 acres of crops, while cultivators in Karambegama have been forced to abandon their fields. Across rural districts, falling storage impairs drinking water supplies, destroys inland commercial fisheries, and deprives dairy cattle of essential hydration.
These widespread disruptions demonstrate that seasonal dry spells can no longer be treated as unexpected natural disasters managed through ad hoc emergency relief. Instead, the crisis underscores a structural failure in how Sri Lanka governs its critical water resources.
At the heart of the problem lies administrative fragmentation. Management of the island’s water network is currently split across three primary State institutions: the Irrigation Department, the Mahaweli Authority, and the Department of Agrarian Development. Major inter-basin reservoirs and trunk canal systems receive capital and engineering priority from the Irrigation Department and the Mahaweli Authority, whereas thousands of minor village tanks remain under the separate purview of the Department of Agrarian Development. During prolonged dry weather, this divided architecture leads to acute operational friction. Downstream minor tanks, which support smallholders, livestock, and local groundwater tables, are routinely starved of replenishment because upstream releases from major schemes are managed in isolation. The absence of integrated, real-time water accounting across administrative borders leaves vulnerable communities exposed to predictable shortages, proving that temporary water bowsers and emergency aid packages are entirely inadequate substitutes for comprehensive policy reform.
Transforming Sri Lanka’s approach to drought requires a fundamental shift from reactive crisis management to proactive, institutional reform. The first essential step is for Parliament to enact legislation establishing a unified National Water Resources Authority. This central body must consolidate the planning, monitoring, and allocation functions currently distributed among the Irrigation Department, the Mahaweli Authority, and the Department of Agrarian Development.
A single national authority would enforce transparent water allocation priorities during low-flow periods, balancing domestic drinking requirements, ecological flows, and agricultural needs. Crucially, centralised governance would enable synchronised water releases between major reservoirs and minor village tank cascades, ensuring that downstream farming communities receive timely allocations rather than suffering from uncoordinated management upstream.
Institutional unification must be accompanied by targeted capital allocation within national infrastructure budgets to restore physical and ecological storage systems. The dry zone benefits from a unique historical legacy: interconnected ancient cascade tank systems that naturally capture rainfall, regulate hydrological flows, and recharge shallow aquifers. Decades of structural neglect and fragmented management have allowed these minor tanks to become heavily silted and ecologically degraded. Infrastructure spending must prioritise systematic de-silting, bund stabilisation, and catchment reforestation across these ancient networks.
Modernising traditional tank cascades expands localised water retention capacity, buffers surface storage against extreme evaporation caused by rising temperatures, and sustains ground aquifers vital for rural livestock and domestic wells. Investing in decentralised, nature-based storage infrastructure offers a far more resilient and cost-effective defence against climatic volatility than sole reliance on costly major engineering works.
Finally, storage and governance reforms will only succeed if paired with a mandatory reduction in agricultural water demand led by the Ministry of Agriculture.
In other words, agricultural policy must actively enforce climate-smart farming techniques, introducing dynamic cropping patterns informed by seasonal hydrological forecasting. State incentives should encourage the adoption of drought-resilient crop varieties and accelerate the transition towards micro-irrigation systems, such as drip and sprinkler technologies, which maximise crop yields while drastically cutting water consumption. Scientific models consistently predict increasingly erratic monsoon cycles and rising global temperatures across South Asia.
Sri Lanka can no longer treat recurrent drought as an unforeseen emergency. Safeguarding agricultural productivity, rural economic stability, and public health demands that national water governance be elevated to a central pillar of national security. Without institutional unification, aggressive modernisation of minor storage infrastructure, and adaptive agricultural planning, seasonal dry spells will continue to devastate farm livelihoods and threaten national food security. The present water crisis must serve as the decisive catalyst for long-overdue legislative and policy reform.