다중회귀분석을 이용한 임계 지속시간의 추정

Abstract

Critical duration is a concept originating from the attempt to design rainfall, considering the fact that runoff caused by a design flood varies depending on the time distribution of rainfall. This study tried to estimate peak flood reflecting the characteristics of the basin by estimating the critical duration utilizing the general geographical data on the Shinan basin. The Shinan basin was divided into 38 small basins according to the local 2nd-degree river standards, and the maximum peak flood duration period based on the time distribution of the design flood was defined in order to estimate geographical characteristic data and critical duration for each small basin. Correlation analysis was conducted on the critical duration and geographical hydrologic factors affecting the critical duration, and a multiple regression analysis was conducted by setting factors with high correlation as independent variables and the estimated critical duration as a dependent variable, yielding a formula for calculating the critical duration that reflects the geographical characteristics of the basin.