1KM DEMを用いたグローバル流域データセットの作成と水資源モデルの開発

抄録

In order to discuss about future food production in global scale against the population growth, it is quite important to understand and estimate the water resource availability. Water resource is a restrictive factor to the agricultural activities as well as the human habitability. A drainage model that follows water surface flow according to the slope direction was developed, using 1km DEM-GTOPO30. This paper mainly describes about the algorithm to generate the drainage model. The extracted drainage systems (stream lines) are faithful to the existing stream line data, however corrections are also required to delineate exact catchmment boundaries.In combining the drainage model with precipitation data, a simple “run-off model” was examined to some basins in Asia. The model simulates the seasonal dynamics of water resources for the whole basin quantitatively.