STUDY OF FLOOD RISK INDEX DUE PELOSIKA DAM BREAK
Indonesia is a country with a fairly high population growth rate. Along with the increase in population, the need for water is absolute because almost all human activities require water. Dams can pose potential disaster hazards, one of which is flooding if a dam collapses. The Pelosika Dam is one...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/70214 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Indonesia is a country with a fairly high population growth rate. Along with the increase
in population, the need for water is absolute because almost all human activities require
water. Dams can pose potential disaster hazards, one of which is flooding if a dam
collapses. The Pelosika Dam is one of the dams planned by BWS Sulawesi IV with a
storage volume of 822.56 million m3. The Pelosika Dam is planned to be able to supply
an irrigation area of 20 thousand ha, a raw water supply of 750 liters/second, 2 x 10.5
MW hydropower. As the downstream area of the dam develops, it is necessary to study
the flood hazard index due to dam collapse in an effort to minimize the impact. Flood
hydrograph modeling due to dam collapse using HEC-HMS produces extreme conditions
in the overtopping scenario with a peak discharge of 56719.7 m3/s. Inundation due to
dam collapse is modeled using HEC-RAS, where the area of inundation that occurs due
to the bottom piping scenario is 38225.13 ha. The final result obtained is a risk index map
where there are 177 inundated villages in Konawe District and 30 inundated villages in
South Konawe District. Based on the results of the analysis of the flood hazard index
referring to the BNPB regulations, 194 villages were found to be in the high risk category
and 13 villages were included in the medium risk index category. |
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