Abstract
A mathematical model that can simulate inundation process in river recreation site due to heavy rainfall has been developed. This model comprises the runoff model by the kinematic wave model and the 2-D inundation flow model based on the generalized curvilinear coordinate system. This model is applied to Hiragino park area in the Kamo river basin, Kyoto City, Japan. It haa been found out under the same rainfall condition as that of the flood accident in the central mountain area in Japan in August 2000, this park area also can become very dangerous. In addition, the flood hazard possibility is expressed by the relation between the rainfall intensity and the time taken for rise of water depth or river flow velocity.
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