THE REGIONAL DIFFERENCE OF THE BENEFIT WITH THE FLOOD MAGNITUDE CHANGE

CASE STUDY IN THE GREATER PHNOM PENH OF THE MEKONG RIVER

Abstract

This paper shows spatial distribution of merits and demerits of flood in the Mekong Basin. Firstly, the flood and inundation surrounding Phnom Penh, Cambodia in 2000 (thel arge flood) and 1994 (the normal flood), was simulated. Secondly, the benefits of the flood were calculated, combining the unit price of primary industry (agriculture and fishery) and the result of the flood simulation. As a result, the large flood gives high productivity of rice along rivers because it flowed out nutrition a lot It also expanded fish product area in the flood plain. Therefore, agriculture and fishery obtained higher benefits in 2000 than 1994. The spatio-temporal benefits and damages were constructed.