South Asia's water crisis is a worldwide concern. The region's population is soon expected to reach two billion; the greater Ganges Basin alone is home to 700 million people, many of whom are among the poorest in the world. Managing water resources in this region to alleviate poverty has historically been an intractable problem, and solutions will require a multidisciplinary approach. This publication documents the proceedings of the South Asia Regional Fulbright Alumni Workshop on the Water-Energy-Food Nexus convened in Kathmandu from 10â€"12 February 2015. The workshop aimed to foster an interdisciplinary and transboundary discussion of the interrelationships among water, energy, and food (WEF). The workshop assembled 60 South Asian alumni of the Fulbright, Humphrey, and International Visitors Leadership programmes, along with 40 regional and international experts, to promote a shared understanding of water, energy, and food issues in the region. Experts in water resources, as well as those specializing in food and energy security, brought to the workshop many years of experience in their own fields and countries. Participants and speakers included government officials, academics, researchers from think tanks, representatives of non-governmental organizations, and activists. The goal of the three-day workshop was to promote a shared understanding of the complex interrelationships among water, energy, and food issues in South Asia and beyond.

In the face of climatic and other socioeconomic changes, most South Asian countries having large and growing population, limited land resources, and increasing water stress face a common challenge of how to grow more food with the same or less land, less water, and increased energy prices. This concept paper seeks deeper understanding of the interlinkages among water, energy, and food, which is crucial to formulate cross-sectoral policies for more resilient and adaptable societies. In South Asia, such a nexus approach inevitably needs to take Himalayan ecosystem services into account. Rice and wheat, the staple foods in South Asia, require huge amounts of both water and energy. The Indus-Ganges-Brahmaputra plain - the sub-region's grain basket and one of the world's largest areas of irrigated agriculture - depends in large part on the Himalayan mountain system as a source of both surface and groundwater for irrigation; as a source of hydropower; and as a regulator of climate and a repository of agro-biodiversity. To sustain these services and to ensure both upstream and downstream food, water, and energy security in South Asia, policies and strategies must therefore promote improved management of Himalayan watersheds, forests, wetlands, and rangelands. Recommended measures include support to restoration of natural water storage capacity; development of climate smart, environmentally and socially sound water infrastructure; adequate investment for natural resource management; and incentives to mountain communities for managing Himalayan ecosystems.