STRUCTURAL MITIGATION EFFORTS IN FLOOD CONTROL OF MIU RIVER IN SIGI DISTRICT, CENTRAL SULAWESI PROVINCE DUE TO HIGH CONCENTRATION OF SEDIMENT FLOW

• Main Author: Sinema Telaumbanua, Mayjen
• Format: Theses
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/87476
• Institution: Institut Teknologi Bandung

After the Palu earthquake, from September 28, 2018 to December 2021, there were at least 24 landslide floods, affecting 15 villages in Palu City, Sigi Regency, and Donggala Regency. In response to the disaster, the Government of Indonesia's National Development Planning Agency (BAPPENAS) immediately established a strategic task team and developed a fundamental reconstruction plan in December 2018. One of the areas prioritized for reconstruction is the section of the Miu River in Gumbasa Sub-district, Sigi Regency, Central Sulawesi Province, which is adjacent to the Palu - Kulawi axis road connecting several sub-districts. The earthquake triggered cliff slides on several hillsides that are part of the Miu River catchment area (subwatershed) which resulted in land cover changes and increased soil erosivity. This will then change the response of the Miu River watershed to stormwater runoff and the additional sediment concentration will affect the morphology of the Miu River. Based on these things, a study is needed related to the potential water damage that will impact the Miu River such as inundation due to overflowing water and river scouring due to changes in river geomorphology that occur in existing conditions or conditions after handling. Structural efforts that are proposed as alternative treatments are revetment buildings to protect river bank scour or series consolidation dam buildings to control scour. Another alternative treatment that can be considered is the proposal of scour zones as a mitigation effort in the face of potential scour.