Irrigated Rice Agriculture in Southeast Asia

Timeline

1. c. -2000–500Red River Delta · VietnamRice spread from South China to the Indochinese Peninsula; early farmers developed paddies on river alluvial plains, combining simple dikes and drainage to form settled agricultural villages.
2. c. 800–1300Angkor site area · CambodiaThe Khmer Empire built large reservoirs, canals, and terraced paddies, supporting the population of Angkor with irrigated rice; water management became an important source of royal legitimacy.
3. c. 1200–1500Sukhothai–Ayutthaya plain · ThailandThai polities such as Sukhothai and Ayutthaya, along with Myanmar and Vietnamese states, competed to expand irrigated rice fields; rice surpluses supported urban markets and foreign trade, making rice the core crop of political economy.
4. c. 1960Mekong Delta · VietnamThe Green Revolution introduced high-yield varieties and chemical fertilizers and pesticides; countries like Vietnam became major world rice exporters, with traditional irrigation systems coexisting alongside modern hydraulic works, and rice remains the foundation of Southeast Asian society.