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Amiruddin, Aswar
Department Of Civil Engineering, Universitas Borneo Tarakan, Indonesia
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Studi Perubahan Penampang Sungai Bengawan Akibat Debit Banjir Menggunakan HEC-RAS Amiruddin, Aswar; Susilo, Yuly Desyana; Ipayanti, Rantika Aulia; Bagaskara, Johan Putra; Rasdi, Rasdi
Borneo Engineering : Jurnal Teknik Sipil Volume 8 Nomor 3 Tahun 2024
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/be.v8i3.6259

Abstract

The Bengawan River exhibits interconnected dynamics. As a result, erosion and sedimentation occur at various points along the river, especially after significant discharge events. HEC-RAS is a software developed by USACE that can simulate 1D sediment transport in rivers. The objective of this research is to analyze the changes in cross-sections of the Bengawan River due to the influence of a 100-year flood using HEC-RAS. The methods employed include the analysis of the 100-year flood discharge using HEC-HMS software and the analysis of cross-sectional changes using HEC-RAS. Based on the analysis, the peak discharge of the 100-year flood hydrograph is determined to be 35.85 m³/s. In the HEC-RAS simulation using a quasi-unsteady flow type with a duration of 48 hours, changes in river cross-sections were observed at stations STA 0+275, 0+250, 0+200, 0+175, 0+100, and 0+75. These cross-sectional changes were caused by sedimentation with thicknesses ranging from 0.13 cm to 2.08 cm
SIMULASI HIDRAULIK ELEVASI MUKA AIR SALURAN RAWASARI MENGGUNAKAN HEC-RAS Amiruddin, Aswar; Widiyanti, Aneza Ferdani
Civil Engineering Scientific Journal Vol 4, No 1 (2025): Civil Engineering Scientific Journal
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/cesj.v4i1.4951

Abstract

The Rawasari Channel is one of the channels in the West Tarakan Subdistrict that supplies water for the availability of water in the city of Tarakan. However, the Rawasari Channel sometimes experiences overflow during high rainfall intensity. The purpose of this research is to determine the water level in the Rawasari Channel through hydraulic simulation using HEC-RAS software. The repeated flood discharge periods used as parameters for this research are 50 years and 100 years, calculated using the Rational method. The flood discharge analysis results using the Rational method for a 50-year recurrence period are 21,098 m3/s, and for a 100-year recurrence period, it is 21,399 m3/s. Based on the HEC-RAS simulation, there is no significant difference in water surface elevations due to the 50 and 100-year floods. From the HEC-RAS simulation, it is also known that due to the flood discharge of 50 and 100 years, overflow occurs in the Rawasari Channel at stations STA 350, 325, 300, 150, and 125. The water surface elevation due to the 50-year flood at STA 350 is 20.38 m, and for STA 300, the water surface elevation for the 50-year flood is 20.29 m. The elevation of the land surface around STA 350 and STA 300 ranges from 19.99 m to 20.19 m, so the height of the inundation due to the overflow of the Rawasari Channel is known to be between 11 cm and 30 cm.
ANALISIS KAPASITAS SALURAN PADA DRAINASE JALAN IMAM BONJOL KELURAHAN PAMUSIAN DENGAN STORM WATER MANAGEMENT MODEL (SWMM) Zunifa, Afara; Amiruddin, Aswar
Civil Engineering Scientific Journal Vol 4, No 2 (2025): Civil Engineering Scientific Journal
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/cesj.v4i2.6252

Abstract

An effective drainage system in urban areas is essential to manage flooding caused by heavy rainfall. Inadequate drainage channels cannot accommodate excess water, leading to water stagnation and other negative impacts. Therefore, calculating the design flood discharge and designing drainage channels with sufficient capacity are crucial for stormwater management. This study aims to evaluate the capacity of existing drainage systems to handle design flood discharge and to design new drainage dimensions that can accommodate the largest discharge. The analysis shows that most existing drainage channels are unable to accommodate the design discharge (Qt) for return periods of 10, 20, 50, and 100 years, as the channel discharge (Qs) is smaller than the design discharge. Simulations using the Storm Water Management Model (SWMM) identified critical points at Junction 4 and Junction 10, where overflow occurs due to excess channel capacity. As a solution, new drainage dimensions were designed. A rectangular channel with a bottom width of 1.2 meters and a height of 1 meter can carry the discharge without overflow for a 100-year return period. Meanwhile, a trapezoidal channel with a bottom width of 0.25 meters, a height of 0.8 meters, and a side slope of 0.618 meters is also effective in accommodating the design discharge without overflow. This study recommends increasing the drainage capacity at critical points to reduce the risk of water stagnation
Co-Authors Asta, Asta Awaludin Awaludin Awaludin, Awaludin Bagaskara, Johan Putra Bayu Kurniawan Dasar, Amry Edy Utomo, Edy Faizal, Rahmat Halim, Zainal Arifin Handayani, Rosmalia I Gede Tunas Ipayanti, Rantika Aulia Irianto Aras Irlan, Ade Okvianti Jean Timoti Jero Budi Darmayasa Kartina Kartina Kartina Khaerunnisa Khairunnisa Khairunnisa kustanrika, irma wirantina Moh Amin Muhamad Roem Muhammad Sofyan Nurdiansyah Nurdiansyah Rahmat Faizal Ramli Ramli Rasdi Rasdi, Rasdi Refina Fatriza Rosmalia Handayani Rr Mekar Ageng Kinasti Ruslan Ruslan Saparuddin Saparuddin Sukardi Nurdin Susilo, Yuly Desyana Sutika Surya Indah Pertami Teguh Hilmansyah Triyanti Anasiru Velizar Sujanes Wahyu Hidayat Widiyanti, Aneza Ferdani Wildan Firdaus Yassir Arafat Zunifa, Afara