RELATIONSHIP BETWEEN INUNDATION AREA AND IRRIGATION AREA ON FLOOD CONTROL IN THE LOWER MEKONG

摘要

Flood and inundation are annual event, which is utilized for agriculture in the Lower Mekong basin. Inundation area can be associated with agricultural land. A numerical simulation was carried out to understand change of inundation area by flood control, and irrigation area estimated from reserved water. The decrease of inundation area caused by flood control is much smaller compared with potential irrigation area. Although decrease of inundating area influence agricultural land, that can be made up for by irrigation. However it is hard to prevent inundation of floodplain even if there is large-scale water control system.