Reduce Flood Losses Of Kali Tanggul Using Spatial Based Technical Approaches
Date
2021-11-26Author
PRABOWO, Prabowo
HALIK, Gusfan
HIDAYAH, Entin
T HAQ, T. Haq
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Show full item recordAbstract
Flood disasters frequently occurred in Jember Regency, East
Java. It is usually caused by the overflow of the Tanggul River
in the rainy season, especially in the downstream area. Flood
control could be done by building dams, embankments,
shortcuts, and other technical flood protections. Meanwhile,
mitigation efforts such as developing thematic maps of flood
inundation need to be done to minimize losses caused by the
flood. This study aims to design a flood mitigation strategy
technically. The flood control structure was proposed by
designing a shortcut in Kali Tanggul. Its performance was
analyzed to reduce flood inundation in the Tanggul watershed.
The flood inundation modeling was carried out using spatial
analysis using ArcGIS 10.1 and hydraulic analysis using HECRAS 5.0.3. Flood inundation results were compared with the
Tanggul watershed flood map developed by UPT PUSDA
Lumajang. Based on modeling results, flood control using
shortcuts is considered an effective strategy for flood mitigation.
It was indicated by the reduction of flood inundation
distributions, flood inundation height, and flood-affected areas.
The results show that the flood height decrease 0.47 up to 0.56
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- LSP-Jurnal Ilmiah Dosen [7297]