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Joko Sujono
Department of Civil and Environmental Engineering
Civil Engineering, Building, Construction & Architecture Environmental Science

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Flood Hazard Mapping of Bogowonto River in Purworejo Regency, Central Java Margaretha Titi Pawestri; Joko Sujono; Istiarto Istiarto
Journal of the Civil Engineering Forum Vol. 2 No. 3 (September 2016)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2156.7 KB) | DOI: 10.22146/jcef.24348

Abstract

The overflowing discharge of Bogowonto River in Purworejo Regency, Central Java flooded the surrounding area during the rainy season. A huge amount of losses such as damage of infrastructures, housing, and agricultural area occurs every year. This research mainly aims to develop flood hazard map and study the characteristics of flood in the study area. There are two main analysis; hydrologic and hydraulic, to model a flood event. Hydrologic and hydraulic modelling of flood based on 20 and 50- years return period hydrograph along the river geometryis done using the latest HEC program namely HEC- HMS 4.1 and HECRAS 5.0. Also, ArcGIS 10.3 is used as a terrain pre-processor and post-processor for hazard mapping. The results of this research are flood hazard maps for 20 and 50 years flood and its comparison to the recent major flood events. Flood inundation modelled covered an area of 993.77 Ha and 1,175.86 Ha, with maximum discharge calculated at Boro Weir as starting point are 1206.2 m3/s and 1,397.3 m3/s for 20 and 50 years flood case, respectively.
Co-Authors Istiarto Istiarto Margaretha Titi Pawestri