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KMID : 1024520170260040411
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Journal of the Environmental Sciences
2017 Volume.26 No. 4 p.411 ~ p.420
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Rainfall Correction of Radar Image Data and Estimation Runoff of Urban Stream using Vflo
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Kang Bo-Seong
Yang Sung-Kee
Kim Yong-Seok
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Abstract
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This research aims at comparing the accuracy of flood discharge estimation. For this, we focused on the Oedo watershed of Jeju Island and compared flood discharge by analyzing the values as follows: (1) the concentration of the lumped model (HEC-HMS) and distributed model (Vflo), and (2) the in-situ data using Fixed Surface Image Velocimetry (FSIV). The flood discharge estimation from the HEC-HMS model is slightly larger than the Vflo model results. This result shows that the estimations of the HEC-HMS are larger than the flood discharge data by 4.43 to 36.24% and that of the Vflo are larger by 8.49 to 11%. In terms of the error analysis at the peak discharge occurrence time of each mapping, HEC-HMS is one hour later than the measured data, but Vflo is almost the same as the measured data.
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KEYWORD
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Flood discharge, HEC-HMS, Vflo, FSIV
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