Abstract
This study aims to develop a PMP estimation method in a basin-scale by considering both temporal and spatial characteristics and to compare the existing PMP estimation method with the developed method in this study. The existing study was performed using the rainfall data within the areal range rainfall events observed in the whole Korean Peninsula with exceeding 130 mm rainfall. Meanwhile, the rainfall data utilized for the new PMP estimation method was determined after selecting the targeted watershed. The new PMP estimation method proposed in the current study is to (1) the DAD analysis was performed using the grid-based rainfall search algorithm. (2) the PMP was estimated by multiplying the maximizing rate of heavy rainfall with the analyzed DAD. PMP using the new estimation method was compared with the exiting PMP as well as the areal maximum probable precipitation. As a result, even though the new estimate is lower than the exiting PMP, it was larger than the areal maximum probable precipitation (200-Year 48-Hour Areal Rainfall Frequency). Therefore, through further study, it is expected to utilize the design flood estimation.
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