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All Journal JURNAL SIPIL SAINS JURNAL BIOSAINSTEK JURNAL SAINS, SOSIAL DAN HUMANIORA
Kamis, Marlina
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Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Social Sciences

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Journal : JURNAL BIOSAINSTEK

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Pemodelan Banjir Desa Wayaua Kecamatan Bacan Timur Selatan Kabupaten Halmahera Selatan Kamis, Marlina; Priambodo, Yudit Agus
JURNAL BIOSAINSTEK Vol 5 No 2 (2023): Jurnal BIOSAINSTEK
Publisher : UNIVERSITAS MUHAMMADIYAH MALUKU UTARA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52046/biosainstek.v5i2.1645

Abstract

Bencana banjir yang terjadi di Desa Wayaua Kecamatan Bacan Timur Selatan Kabupaten Halmahera Selatan pada 03 Oktober 2021 meredam ratusan rumah yang diakibatkan curah hujan yang tinggi sehingga air sungai meluap. Dan tanggal 30 Agutus 2022 terjadi lagi banjir yang sama menggenani rumah warga. Oleh karena itu tujuan penelitian ini adalah melakukan pemodelan banjir yang disebabkan oleh luapan sungai di desa Wayaua serta melihat cakupan wilayah genangan banjir. Desa Wayaua termasuk desa di pesisir pantai dengan luas wilayah 98.5 km2. Metode pemodelan banjir menggunakan pendekatan hidrolika dalam mensimulasikan debit air pada sungai menggunakan software HEC-HMS, serta melakukan visualisasi daerah genangan banjir serta area terdampak banjir menggunakan pendekatan GIS dengan software HEC-RAS dengan interaksi pasang surut air laut. Besar debit banjir yang didapat berdasarkan analisa hidrologi pada Software HEC-HMS untuk kala ulang Q2th, Q5th, Q10th, Q25th, Q50th, Q100th masing-masing sebesar 25.9m3/s, 42.4m3/s, 53.2m3/s, 66.6m3/s, 77.3m3/s, 87.8m3/s. Sedangkan luas genangan banjir yang didapat dari hasil pemodelan banjir pada Software HEC-RAS berdasarkan banjir kala ulang Q2th, Q5th, Q10th, Q25th, Q50th, Q100th masing-masing adalah 9.33 hektar, 9.88 hektar, 10.33 hektar, 10.72 hektar, 11.14 hektar, 11.65 hektar.
Modeling and Visualization of Flooding in the Wai Lamo River, Kao Barat District, North Halmahera Regency Kamis, Marlina; Priambodo, Yudit Agus
JURNAL BIOSAINSTEK Vol 7 No 1 (2025): Jurnal BIOSAINSTEK
Publisher : UNIVERSITAS MUHAMMADIYAH MALUKU UTARA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52046/biosainstek.v7i1.2364

Abstract

In the North Maluku Province, specifically in the Kao Barat District of North Halmahera Regency, there is the Wai Lamo River which flows through five villages: Pitago Village, Bailengit Village, Soamaetek Village, Parseba Village, and Tuguis Village. These villages are often affected by flooding due to the river's overflow during heavy rainfall. The purpose of this study is to model the flooding caused by the overflow of the Wai Lamo River, especially in these five villages, and to assess the extent of the flood-affected area. The flood modeling method uses a hydrological approach to simulate water discharge in the river using the HEC-HMS software, and flood inundation areas and affected zones are visualized using GIS with HEC-RAS software. The flood discharge rates obtained from hydrological analysis using HEC-HMS (Hydrologic Modeling System) for return periods of 2, 5, 10, 20, 50, and 100 years at the flood-affected village control points are 115.8 m³/s, 324 m³/s, 550.2 m³/s, 848.5 m³/s, 1376.6 m³/s, and 1897 m³/s, respectively. The results of flood inundation modeling using HEC-RAS (River Analysis System) based on the return period floods show that the overflow of the Wai Lamo River impacts Pitago Village, Bailengit Village, Soamaetek Village, Parseba Village, and Tuguis Village due to their proximity to the riverbanks. Therefore, river embankments and riverbed normalization are required to protect the settlements from the overflow of the Wai Lamo River.
Co-Authors Priambodo, Yudit Agus