The AQUASTAT Programme was initiated with a view to presenting a comprehensive picture of water resources and irrigation in the countries of Africa, Asia, Latin America and the Caribbean and providing systematic, up-to-date and reliable information on water for agriculture and rural development. This report presents the results of the most recent survey carried out in the 22 countries of the Southern and Eastern Asia region, and it analyses the changes that have occurred in the ten years since the first survey. Following the AQUASTAT methodology, the survey relied as much as possible on country-based statistics and information. The report consists of four sections. Section I describes in detail the methodology used. Section II contains the regional analysis which presents a synopsis on water resources development and irrigation in the region. Section III contains a more detailed description of four transboundary river basins: the Ganges-Brahmaputra-Meghna, Indus, Mekong and Salween river basins. Finally, Section IV contains the detailed profiles on the situation in each country: Bangladesh, Bhutan, Brunei Darussalam, Cambodia, China, Democratic People's Republic of Korea, India, Indonesia, Lao People's Democratic Republic, Malaysia, Maldives, Mongolia, Myanmar, Nepal, Pakistan, Papua New Guinea, Philippines, Republic of Korea, Sri Lanka, Thailand, Timor-Leste and Viet Nam.