Abstract
With emphasis on the hydrological conditions, this study analyzed changes in agricultural land use from the 1950s through the 2000s in the northeastern region of Thailand where rain-fed rice cultivation predominates. Spatial distribution of hydrological conditions was obtained from time-series images of a synthetic aperture radar. Overall, the paddy fields expanded from the wetter areas toward drier areas. However, there were variations in the rate of increase of paddy fields in drier areas within the study area. This was due to differences in the degree of mixture of spatial distribution of the hydrological conditions, an uneven distribution of population, and the level of progress in flood prevention.
