부정류 모형을 이용한 하천 조도계수 산정 및 산정오차의 수면곡선에 대한 민감도 분석

Manning's n Calibration and Sensitivity Analysis using Unsteady Flood Routing Model

  • 김선민 (교토대학교 도시 및 환경공학과) ;
  • 정관수 (충남대학교 토목공학과)
  • 발행 : 2005.05.01

초록

This study is to figure out uncertainty relationship between input data and calibrated parameter on unsteady hydraulic routing model. The uncertainty would be present to model results as a variant water surface profile along the channel. Firstly, Manning's n is calibrated through the model with assumed uncertainty on input hydrograph. Then, spatially distributed n-values sets based on the calibrated n values are used to get water profile of each n-values set. The results show that ${\pm}0.002$ of error in Manning's n cause ${\pm}30cm$ of maximum water surface differences at the Sumjin river.

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