Host: Japan Society of Hydrology and Water Resources
Pages 24-
In recent years, flood damage caused by heavy rain that exceeds the plan scale is frequent. Recently, high
importance of excess flood measures is recognized with uncertainty of external force. External force scale and uncertainty are assumed to be increased by climate change. For this reason, it is highly necessary for a new flood planning theory by considering uncertainties by rational methods. In this paper,we suggested excess flood measures by d4PDF precipitation data. (1)Evaluation of uncertainty due to the difference in the probability distribution : GEV distribution is higher goodness of fit than Gumbel in the climate change condition because extreme events are remarkable. (2) Evaluation of uncertainty as excess flood measures: GEV distribution has larger uncertainty than Gumbel, it exceeds probable maximum precipitation in climate change condition.
