By Arslan Sheikh - South Asia Desk
The growing population and economies of South Asia are crucially dependent on its rivers and lands. Major rivers like Brahmaputra, Ganges, and Indus are the main sources of agriculture, energy, and livelihood. The region inhabits about a quarter of the world's population but only around four percent of its renewable waters. Global Environmental Change (GEC) is exacerbating glacial melt and shifting monsoon patterns causing extreme frequent floods and droughts. In terms of energy, South Asia is facing chronic deficiency - infrastructure strain and fuel import dependence have led many areas without reliable power. Experts argue that without new and efficient sources of energy which is causing “energy and power shortages”, could lead to crises. Altogether, these strains on water, food, and energy, accentuates urgent need for coordinated policies.
The Water-Energy-Food Nexus in South Asia
Water produces energy and is crucial for agriculture which provides food. Water management is “undoubtedly complex and interlinked with other significant challenges, including energy and food security, [and] agricultural production”. Agriculture uses most of South Asia’s freshwater and its farmers are heavily dependent on groundwater for irrigation. The tubewells/pumps used for the irrigation are run by diesel or electricity, which means energy shortfalls or high costs would adversely impact food production. Reciprocally, thermal power plants need high volumes of water for cooling, so water scarcity can also put strain on energy output. On the other hand, hydropower depends on rivers that also irrigate agricultural lands. In sum, activities in one sector often popple across other sectors. Integrated and coordinated approaches are therefore important for planning.
The stress due to GEC intensifies these interlinked water-food-energy nexus. Glacial melt and extreme droughts may lead to pumping of more groundwater, increasing demands for energy and depleting aquifers. Moreover, extreme droughts or floods can sever power generation. In the absence of cross-sectoral planning, South Asian countries are risking the opportunity to solve one problem, only to worsen another. In view of this, analysts argue that any policies for South Asian “development” must take into account these interdependencies.
Transboundary Water Management
Majority of South Asia’s waters come from the high Himalayas - highlighting the transnational character of these waters. These basins flow across multiple countries, yet formal cooperation is very limited and narrow in scope. No region-wide institution is in place to manage these shared basins with the exception of a few bilateral treaties that cover dozens of cross-boundary rivers. For example, India and Bangladesh, which share fifty-four rivers, have a Joint Rivers Commission and a 1996 Ganges water-sharing treaty. India and Pakistan have the Indus Water Treaty of 1960 - but currently in abeyance. India also has a 1996 Mahakali Treaty with Nepal as well as multiple powersharing agreements with Bhutan. Despite these limited agreements, there is no comprehensive cooperative framework among all riparians, majority of whose headwaters originate in China.
This assortment of water sharing is not sufficient in times of growing demands. Urbanizations and agricultural expansion are exploiting rivers and groundwater unsustainably, putting the region under water stress unless there is any improvement in management. Yet national policies are centred around short-term un-sustainable developmental goals without any consideration of its cross-sectoral and cross-boundary impacts. In these crucial times, countries prioritizing zero-sum games and competition over collaboration highlight how much they are worried about human and environmental security instead of national - ironically achieving neither.
Building of trust among South Asian countries is a constant challenge because of factors not limited to historical rivalries and concerns - which has led to minimal transparency and sharing of crucial environmental data. Increased data sharing and transparency are critical for riparian countries to negotiate equal and sustainable usage of waters. If the riparian countries of South Asia seek shared water security, cooperation over conflict offers a good chance for equitable and sustainable management.
Regional Energy Integration
South Asian countries are exploring cross-border trade of power to fill energy gaps. A World Bank researcher argues that in case of a unified South Asian regional “market”, untapped hydro resources could nearly double its generation capacity, and adding a moderate carbon tax could raise hydropower output by roughly 2.7 times over two decades. Another analysis highlights that electricity sharing would let South Asian countries exploit complementarities - for example, distribution of surplus peak to deficit area.
Some regional approaches are in process of materializing. Bangladesh, Bhutan, India, and Nepal are discussing grid connections and energy corridors. For example, plans for an Easter Waterways Grid proposes linking river ports and transmission lines between India and Bangladesh, also connecting Bhutan and Nepal to facilitate trade. This initiative is projected to benefit some six-hundred million people across the sub-region. India has already positioned itself as a power-trade hub - it exports power to Bangladesh, Myanmar, and Nepal, while importing from Bhutan and Nepal. These examples are early steps toward a limited integrated system. If expanded to all South Asian countries, such trading would allow surplus power to flow in deficit regions, smoothing out fluctuations and lowering costs. Achieving sustainable energy security in South Asia is only possible through regional collaboration.
Agriculture, Food Security, Energy
Agriculture is the biggest provider of employment and food security in South Asia. It needs both water and energy, not only for irrigation but also for fertilisation, mechanisation, and post-harvest cold storage. Irrigation uses majority of freshwater in some areas. This means that any shortage in water or power can directly impact the crop production and harvests. Ignoring these linkages could backfire and undermine both food and energy security of the region.

As of 2021, nearly eight percent of the people in region lack access to reliable grid-based electricity, an forty-seven percent remain inaccessible to clean cooking fuels and technologies. In addition to this, the existing inefficiencies of the system has given rise to a three-fold challenge - “energy security, energy equity, and environmental sustainability”.
GEC-led variability adds complex challenges to the food production. The changing monsoon patterns and decreasing glacial melt in late summer can leave fields parched at important times. Simultaneously, increase in the occurrence of frequent floods are damaging crops and land. A cooperative regional approach could help reducing these risks. For example, sharing efficient practices in irrigation or rural electrification would yield benefits. Coordinated flood forecasting and storage-release policies could improve water use across borders to protect food and power systems.
Conclusion
The potential benefits of collaboration is enormous. For example, the increase in hydropower generation through regional markets could replace the need for expensive fuel-import, reducing carbon emissions and energy costs. An efficient, coordinated, and equitable water management could protect agriculture and industry from instability. The increase in transboundary power trade could also secure energy. Shared infrastructure could improve disaster resilience. Though this article may seem pointing towards a more ideal scenarios, but acknowledging the geopolitical barriers, water-food-energy nexus itself leaves no choice but to accept the fact that share challenges need shared solutions.





