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All Journal Jurnal Ilmiah Poli Rekayasa Jurnal Teknik Sipil dan Perencanaan Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Jurnal Ilmiah Rekayasa Sipil JITSI : Jurnal Ilmiah Teknologi Sistem Informasi
Revalin Herdianto
Politeknik Negeri Padang
Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Engineering

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Journal : Jurnal Ilmiah Rekayasa Sipil

 1 
Analisa Kedalaman Gerusan di Batang Bangko akibat Banjir Bandang Tahun 2016 Ihsan, Afif Kumala; Marceli, Fidela Erina; Herdianto, Revalin; Sadtim, Sadtim
Jurnal Ilmiah Rekayasa Sipil Vol 21 No 1 (2024): April 2024
Publisher : Pusat Penelitian dan Pengembangan Masyarakat (P3M), Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jirs.v21i1.1109

Abstract

B Bangko River is one of tributaries in Batanghari River Basin that is originated from Solok selatan Regency. Bangko River had a flash flood on February 8th, 2016 that resulted in vast destruction of paddy field, residences, bridges, and flood plain. At several points along the river, some changes in river morphology were observed. These changes triggered some concern on safety of buildings and residencies along the riverbanks. Hence, there was a need of a study on changes of river behavior laterally and vertically for structural as well as non-structural measures to control morphological changes of the river. This study aims to find scour depth in current conditions due to various discharge schemes that might occur in Batang Bangko. Scour depth was analyzed using Lacey Channel Regime theory, Blench equation (1969), Blodgett equation (1986), and Pemberton dan Lara equation (1984). Design rainfall was calculated using data from Padang Aro and Muaro Labuh rainfall station from year 2007-2021. Sediment gradation was analyzed at laboratory of Civil Engineering Departement, Politeknik Negeri Padang. The results of scour depth from formulas were compared with actual scour depth of Bangko River. The analysis revealed that with Q25 of 492 m3/s results in scour depth of 1,402 m (Lacey Formula (Novak, ET AL., 2007); 0,588 m of Blench formula, 1,535 m of Lacey formula (R.J. Garde, 2006); 1,361 m of Lacey formula (Direktorat Jendral Sumber Daya Air, 2013). This study concluded that actual scour of 1.1 m is the nearest to Lacey formula (Novak, ET AL., 2007).
Simulasi Hidrologi dan Hidraulik Banjir di Lembah Anai: Studi Kasus 11 Mei 2024 Syofyan, Elvi Roza; Herdianto, Revalin; Arlis, Angga Putra; Yuwono, Waluyo; Thaariq, Ath
Jurnal Ilmiah Rekayasa Sipil Vol 22 No 1 (2025): April 2025
Publisher : Pusat Penelitian dan Pengembangan Masyarakat (P3M), Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jirs.v22i1.1618

Abstract

Since early 2023, Mount Marapi has shown its activity, even until 2024 Mount Marapi has erupted 170 times. Until Monday morning, April 29, 2024, at 06.00 WIB, Mount Marapi remains on Alert status (Level III). This indicates that a lot of landslide material due to volcanic eruptions has accumulated around the peak and upper slopes, which at any time can cause rain-induced lava floods. Related to the activities of Mount Marapi, a map of hazard-prone areas has been issued, including rivers that originate from Mount Marapi which are susceptible to rain-induced lava floods. The research was carried out by identifying river network patterns, hydrological characteristics, river morphology, and land use changes. The river network was analyzed using the Digital Elevation Model (DEM) from ASTER GDEM with a resolution of 8 m. Field validation for the river network was carried out using GPS Mapping at the Xakapa location. The hydrological and hydraulic profiles of the watershed were modeled using HEC-geoHMS and HEC-geoRAS to map the relationship between rainfall intensity, river discharge, and water level elevation along the river. From the modeling results, it can be seen that the rainfall intensity that has the potential to cause flooding is 142 mm/hour, using HEC-GeoHMS with a discharge of 1818 m3/second with a rainfall time of 6 hours causing a flood height of 0.81 m at an elevation of 379.9 with a wet cross-sectional area of ​​471 m2 in Xakapa.
Co-Authors -, Amrizal Saidi Amrizal Saidi Arlis, Angga Putra Bambang Istijono, Bambang Elvi Roza Syofyan Fajri Ramadhan - Feri Arlius Ihsan, Afif Kumala Junaldi Junaldi Marceli, Fidela Erina Prestyo Anggara Lubis Rio Valery Allen Roni Putra Rusnam Rusnam Sadtim Sadtim Suhendrik Hanwar Surfa Yondri Thaariq, Ath Tri Intan Putri Yola Amelia - Yuwono, Waluyo