Performance of UAV Image for Flood Mapping with 2 Dimensional Model in Kaliputih River, Panti District

In January 2006, the flash flood in Panti Sub-district was a national disaster, causing damage to building infrastructure and fatalities. From this incident, it is necessary have mitigation by providing map of distribution inundation using 2D hydraulic model provide information regarding extent study area. Due limited DEM data for modeling, use UAV images DSM with good higher resolution. This aims assess performance modeling results HEC-RAS equipped RAS Mapper through processing as input. There are 21 GCP area an increase accuracy, RMSE value horizontal direction 0.3853m, vertical 0.1836m. CE90 accuracy test 0.58m LE90 0.30m, can be concluded that meets 1:2500 scale. Terrain maps input HEC-RAS; selected meshes 5x5m 2x2m. The show depth each from min-max depth. calibration shows 0.183, while validation 0.13. other words, represent benefits community more alert event coming year.
 Keywords : UAV; GCP; DSM; HEC-RA; Flood mapping
 
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