... accepts yearly all the water flood volume of the basin. About 1.2 to 1.9 million ha of land, mainly in the North parts of the MD such as the LongXuyen quadrangle and the Plain of Reeds, affected ... the largest rivers in the world and is longest river in southeastern Asia. From its source in Tibet, the river flows to the South China Sea through Yunnan, China, forms the border partly between ... 450,000 million m3 of runoff water yearly to sea. About 80 percent of annual flow volume enters the low lying parts of the basin in Vietnam as the flood season from June to November. The river...