Abstract
In this study, availability of global datasets, such as rain gauge data, satellite observations (GPCP and GSMaP) and reanalysis data (APHRO and H08) were discussed and analyzed in the Mekong River basin. First, spatial distribution and monthly precipitation data in 2000 were compared by each datasets. APHRO and H08 datasets were identified as better representing for wide areas like the whole basin. Secondly, precipitation intensity frequency was compared. Extreme event at lower-basin area could be estimated by GPCP and GSMaP. It is suggested that GPCP and GSMaP are useful for short term event such as flood simulation. Finally, using calculated annual water balance within the catchment, precipitation at several sub-catchments were compared and discussed. H08 was closest to estimated precipitation at each sub-catchment. And APHRO could represent characteristics of precipitation at sub-catchment.
