Paper Title
Estimating Typhoon-Induced Maximum Flood for Dam Safety Assessment – A Case Study in Taiwan

Abstract
Dam safety assessment is conducted regularly to investigate the risk of a dam and to propose remedies to conserve effective operations of the reservoir. In considering the climate variability and the degeneration of the concrete structures, the inspection and the safety assessment for mid and bigsizes hydraulic structures are usually conducted every five years. One of the most important checking points of the assessment in performing the hydrological analyses is the estimation of the probable maximum flood (PMF) for the existing spillway. Hence, the probable maximum precipitation (PMP) should be evaluated to account for the climate and geomorphological variability of the study watershed to avoid the spillway that cannot well drain the increase of PMF. Two PMP methods: (a) the storm-transposition and dew-point adjustment method, and (b) the typhoon rainstorm method were applied in this study. The PMP values were then used as the input of two runoff models to generate the flood hydrographs to obtain the PMF. The PMP and PMF analyses were conducted in two large reservoirs in north Taiwan. The results of the analyses were then compared with the method suggested by the World Meteorological Organization (WMO) to examine the reasonability of the PMP and PMF values estimated in this study. Keywords - Typhoon Flood, Probable Maximum Precipitation, Probable Maximum Flood, Storm-Transposition and Dew-Point Adjustment Method, Typhoon Rainstorm Method