Abdul Malik, Diana Rahayu, Irpan Chumaedi, Muhammad Nuruzzaman, Nuzulul Alifin Nur
The Ongkag Dumoga River is located in Bolaang District, Bolaang Mongondow Regency, North Sulawesi. Sedimentation that occurs downstream of the Ongkag Dumoga River is an accumulation of sediment transport carried by river flows from upstream. Therefore, a hydrological analysis was carried out. In contrast to flood analysis, which requires a planned discharge in short intervals [hours or days], for sediment analysis we need discharge data with long time series [weeks, months, or years]. Due to the gradual movement of sediments, the discharge boundary conditions must also be able to capture the phenomenon of sediment movement over a long period of time. To meet the need for debit data with a long time series, the mainstay discharge is calculated. From the results of the calculation of the FJ discharge. Mock, the results of the simulation discharge time repeat Q40 is 52.39 m3/s, Q50 is 42.20 m3/s, Q60 is 40.22 m3/s, Q70 is 39.10 m3/s, Q80 is 32.87 m3//s, and Q90 is 30.04 m3/s. From the calculation results, it is shown that the availability of water will decrease slowly. © 2023 Author(s).
Department of Civil Engineering and Planing Education, Universitas Negeri Yogyakarta, Indonesia; Building Engineering Education Study Program, Universitas Pendidikan Indonesia, Indonesia; Master Degree Student of Water Resource Management Department, Institut Teknologi Bandung, Indonesia
