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http://dx.doi.org/10.17663/JWR.2011.13.1.105

Decision of GIS Optimum Grid on Applying Distributed Rainfall-Runoff Model with Radar Resolution  

Kim, Yon-Soo (노아솔루션(주).기술연구소)
Chang, Kwon-Hee (노아솔루션(주).기술연구소)
Kim, Byung-Sik (한국건설기술연구원 수자원연구실)
Kim, Hung-Soo (인하대학교 토목공학과)
Publication Information
Journal of Wetlands Research / v.13, no.1, 2011 , pp. 105-116 More about this Journal
Abstract
Changes in climate have largely increased concentrated heavy rainfall, which in turn is causing enormous damages to humans and properties. Therefore, the exact relationship and the spatial variability analysis of hydrometeorological elements and characteristic factors is critical elements to reduce the uncertainty in rainfall -runoff model. In this study, radar rainfall grid resolution and grid resolution depending on the topographic factor in rainfall - runoff models were how to respond. In this study, semi-distribution of rainfall-runoff model using the model ModClark of Inje, Gangwon Naerin watershed was used as Gwangdeok RADAR data. The completed ModClark model was calibrated for use DEM of cell size of 30m, 150m, 250m, 350m was chosen for the application, and runoff simulated by the RADAR rainfall data of 500m, 1km, 2km, 5km, 10km from 14 to 17 on July, 2006. According to the resolution of each grid, in order to compare simulation results, the runoff hydrograph has been made and the runoff has also been simulated. As a result, it was highly runoff simulation if the cell size is DEM 30m~150m, RADAR rainfall 500m~2km for peak flow and runoff volume. In the statistical analysis results, if every DEM cell size are 500m and if RADAR rainfall cell size is 30m, relevance of model was higher. Result of sensitivity assessment, high index DEM give effect to result of distributed model. Recently, rainfall -runoff analysis is used lumped model to distributed model. So, this study is expected to make use of the efficiently decision criteria for configurated models.
Keywords
Distributed Model; Radar Rainfall; Grid Resolution;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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