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http://dx.doi.org/10.17663/JWR.2012.14.2.243

Flood Simulation using Vflo and Radar Rainfall Adjustment Data by Statistical Objective Analysis  

Noh, Hui Seong (인하대학교 사회기반시스템공학부)
Kang, Na Rae (인하대학교 사회기반시스템공학부)
Kim, Byung Sik (강원대학교 방재전문대학원 도사환경방재전공)
Kim, Hung Soo (인하대학교 사회기반시스템공학부)
Publication Information
Journal of Wetlands Research / v.14, no.2, 2012 , pp. 243-254 More about this Journal
Abstract
Recently, the use of radar rainfall data that can help tracking of the development and movement of rainfall's spatial distribution is drawing much attention in hydrology. The reliability of existing radar rainfall compared to gauge rainfall data on the ground has not yet been confirmed and so we have difficulties to apply the radar rainfall in hydrology. The radar rainfall for the applications in hydrology are adjusted merging method derived from gage. This study uses the Mean-Field Bias (MFB) and Statistical Objective Analysis (SOA) as correction methods to create adjusted grid-based radar rainfall data which can represent the temporal and spatial distribution of rainfall. This study used a storm event occurred in August 2010 for the adjustment of radar rainfall. In addition, the grid-based distributed rainfall-runoff model (Vflo), which enables more detailed examinations of spatial flux changes in the basin rather than the lumped hydrological models, has been applied to Gamcheon river basin which is a tributary of Nakdong River located in south-eastern part of the Korean peninsular and the basin area is $1005km^2$. The simulated runoff was compared with the observed runoff in an attempt to evaluate the usability of radar rainfall data and the reliability of the correction methods. The error range of peak discharge using each correction method was within 20 percent and the efficiency of the model was between 60 and 80 percent. In particular, the SOA method showed better results than MFB method. Therefore, the SOA method could be used for the adjustment of grid-based radar rainfall and the adjusted radar rainfall can be used as an input data of rainfall-runoff models.
Keywords
Radar rainfall; Mean-Field Bias(MFB); Statistical Objective Analysis(SOA); Vflo; flood Simulation;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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