Abstract
Level 2 performance based design, which considers the probability of design values as normal or lognormal distribution, is introduced for coastal pumping stations. Considering inundation risk, the outer forces are assumed to be the increase of water levels in drainage canals caused by inflow, and counter forces are assumed to be the decrease of water levels in drainage canals caused by pumping discharge and drainage gate discharge. Design rainfall is modeled as lognormal distribution based on data from the Saga Meteorological station. Design tide levels are modeled as the sum of residuals of high tides caused by typhoons and astronomic tides at Oura. Based on a Monte Caro simulation for 100,000 years, the maximum water level data in drainage canals are calculated to evaluate performance.
