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All Journal Jurnal Talenta Sipil
Ade Tricia Miranda
Universitas Muhammadiyah Palembang, Indonesia
Civil Engineering, Building, Construction & Architecture Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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Simulasi dan Pemetaan Banjir 1D dan 2D di Wilayah Hilir Sub-Das Lambidaro Menggunakan HEC-RAS Ade Tricia Miranda; Hartini Hartini; Adji Sutama; Marice Agustini
Jurnal Talenta Sipil Vol 9, No 2 (2026): Agustus
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v9i2.1351

Abstract

Flooding is one of the most destructive natural disasters and frequently occurs in densely populated residential areas located in lowland regions. Lowland areas with high population density generally have low infiltration capacity and high surface runoff, causing flooding to occur repeatedly during rainfall events. Palembang City is predominantly situated in lowland areas and has a relatively high population density. The downstream area of the Lambidaro sub-watershed is one of the densely populated lowland regions in Palembang City, making it highly vulnerable to flooding during rainfall events with certain intensities. This study aims to simulate and map flooding in the downstream area of the Lambidaro sub-watershed using the HEC-RAS program, in which flood discharge was first analyzed using the Nakayasu Synthetic Unit Hydrograph (HSS) method. Based on the flood analysis using the Nakayasu Synthetic Unit Hydrograph (HSS) method, a simulated peak flood discharge of 57.17 m³/s was obtained from the maximum effective rainfall during the observation period from January 1, 2026 to April 9, 2026, with an effective rainfall value of 43.376 mm. In this study, rainfall data were obtained from NASA POWER Data Access Viewer (DAV) satellite data, which were utilized as satellite-based rainfall estimation data for daily hydrological analysis while considering the limitations of the data and the need for verification using local observational records. Based on the 1D and 2D simulations using the HEC-RAS program, flooding in the downstream area of the Lambidaro sub-watershed was predominantly concentrated in areas surrounding the Lambidaro River, with floodwater depths reaching up to 0.73 meters.
Evaluasi Kapasitas Drainase di Jalan Mayjen HM Ryacudu Kota Palembang Menggunakan Pemodelan EPA SWMM Ade Tricia Miranda; Hartini Hartini; Adji Sutama; Marice Agustini
Jurnal Talenta Sipil Vol 9, No 2 (2026): Agustus
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v9i2.1352

Abstract

Flooding is a natural disaster that significantly disrupts human activities. The occurrence of flooding is closely related to drainage problems, as rainwater runoff requires a drainage system capable of collecting and conveying runoff water to drainage outlets. Jalan Mayjen HM Ryacudu in Palembang City frequently experiences flooding, even though the existing drainage system has an outlet that directly discharges into the Musi River. This study evaluated the drainage capacity along Jalan Mayjen HM Ryacudu due to the persistent flooding occurring in the area. The purpose of this evaluation was to determine an appropriate drainage capacity within the study area as a mitigation measure against flooding. The evaluation was conducted by simulating rainfall runoff using the EPA SWMM program. The results of the EPA SWMM modeling indicate that the existing drainage capacity is still unable to optimally accommodate and convey rainwater runoff, resulting in inundation at several locations along Jalan Mayjen HM Ryacudu. The mitigation scenario through drainage dimension optimization showed that modifying the drainage channels to a uniform size of 1.2 × 1.2 meters was able to eliminate flooding indications in the EPA SWMM simulation results.
Co-Authors Adji Sutama Hartini Hartini Marice Agustini