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http://dx.doi.org/10.3741/JKWRA.2014.47.9.839

Applicability of a Space-time Rainfall Downscaling Algorithm Based on Multifractal Framework in Modeling Heavy Rainfall Events in Korean Peninsula  

Lee, Dongryul (Center of Disaster Research and Hydrologic Data Center Using Radar Measurement, Korea Institute of Construction Technology)
Lee, Jinsoo (Department of Civil Engineering, Hongik University)
Kim, Dongkyun (Department of Civil Engineering, Hongik University)
Publication Information
Journal of Korea Water Resources Association / v.47, no.9, 2014 , pp. 839-852 More about this Journal
Abstract
This study analyzed the applicability of a rainfall downscaling algorithm in space-time multifractal framework (RDSTMF) in Korean Peninsula. To achieve this purpose, the 8 heavy rainfall events that occurred in Korea during the period between 2008 and 2012 were analyzed using the radar rainfall imagery. The result of the analysis indicated that there is a strong tendency of the multifractality for all 8 heavy rainfall events. Based on the multifractal exponents obtained from the analysis, the parameters of the RDSTMF were obtained and the relationship between the average intensity of the rainfall events and the parameters of the RDSTMF was developed. Based on this relationship, the synthetic space-time rainfall fields were generated using the RDSTMF. Then, the generated synthetic space-time rainfall fields were compared to the observation. The result of the comparison indicated that the RDSTMF can accurately reproduce the multifractal exponents of the observed rainfall field up to 3rd order and the cumulative density function of the observed space-time rainfall field with a reasoable accuracy.
Keywords
downscaling; climate change; fractal; multifractal; rainfall; precipitation;
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Times Cited By KSCI : 4  (Citation Analysis)
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