• Title/Summary/Keyword: 도식(圖式)

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An Analysis on Hydrologic Characteristics of Design Rainfall for the Design of Hydraulic Structure (수공구조물 설계를 위한 설계강우의 수문학적 특성 분석)

  • Lee, Jeong-Sik;Lee, Jae-Jun;Park, Jong-Yeong
    • Journal of Korea Water Resources Association
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    • v.34 no.1
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    • pp.67-80
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    • 2001

  • This study is to propose temporal pattern of design rainfall which causes maximum peak discharge and to analyze the variation in peak discharge according to design rainfall durations. In this study, the Mononobe, the Yen and Chow triangular, the Huff's 4th quartiles and the Keifer and Chu methods are applied to estimate the proper temporal pattern of design rainfall and three rainfall-runoff models such as SCS, Nakayasu, and Clark methods are used to estimate the runoff hydrograph. And to examine the variability of peak discharge, the hydrologic characteristics from the rainfall-runoff models to which uniform rainfall intensity is applied are used as the standard values. The type of temporal pattern of design rainfall which causes maximum peak discharge in both of the watersheds and the rainfall-runoff models has resulted in Yen and Chow distribution method with the dimensionless vague of 0.75. On the basis of determined temporal pattern, the examination of the variability of peak discharge according to design rainfall durations shows that design rainfall duration varies greatly with the types of probable intensity formula, and the variation of peak discharge is more affected by the types of probable intensity formula and I-D-F currie than rainfall-runoff models.

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