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All Journal Sinergi Bulletin of Civil Engineering
Asferizal, Ferial
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Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering

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Drainage system analysis using Storm Water Management Model (SWMM) in flood mitigation efforts in the valley area Asferizal, Ferial; Mashuri, Mashuri; Hasibuan, Hotmida R.
SINERGI Vol 28, No 3 (2024)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2024.3.014

Abstract

This research takes place in the North Siantar Subdistrict of Pematangsiantar City, where issues with the drainage system result in frequent flooding in the valley area. Previously, this phenomenon has not been extensively researched. The study aims to analyze infiltration wells on Bah Tongguran Street in the North Siantar Subdistrict of Pematangsiantar City through existing drainage simulation using SWMM software. Water pooling at this location leads to floods due to insufficient drainage capacity, exacerbated by the valley-shaped land contour and high population density. The simulation results, utilizing SWMM software with the Gumbel method for rainfall distribution and a 5-year return period, revealed that the channels on both sides of Bah Tongguran Street cannot accommodate rainwater discharge. The dimensions of the existing drainage channel are b = 0.3 and h = 0.45. To address this issue, we propose the construction of infiltration wells with a diameter of 1.4 meters and a depth of 1.5 meters. The analysis determined that the infiltration wells would be 24 wells on the left and 21 on the right. These infiltration wells will be constructed using concrete pipes, with an effectiveness rate of 65% for the left side and 58% for the right. Through this intervention, our research aims to serve as a reference for planners designing infiltration wells in valley areas and as a resource for other researchers developing sustainable flood mitigation technologies.
Analisis Perubahan Tutupan Lahan dan Dampaknya Terhadap Debit Banjir di Sub-Das Way Bulok Asferizal, Ferial; Afifah Farnela, Tazza; Nurul Fauziah, Selma; Wulandari, Siska; Yanda, Rahma; Isoralla, Isoralla; Kurnianingtyas, Erlina; Hakiem Sedo Putra, Muhammad
Bulletin of Civil Engineering Vol. 6 No. 2 (2026): Agustus
Publisher : Civil Engineering Department, Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/bce.v6i2.30334

Abstract

Perubahan tutupan lahan merupakan salah satu faktor utama yang memengaruhi peningkatan debit banjir pada suatu daerah aliran sungai (DAS). Sub-DAS Way Bulok mengalami perkembangan wilayah yang pesat akibat aktivitas antropogenik, sehingga berpotensi menurunkan kapasitas resapan dan meningkatkan limpasan permukaan. Penelitian ini ditujukan untuk menganalisis perubahan tutupan lahan dan pengaruhnya terhadap debit banjir pada Sub-DAS Way Bulok selama periode pengamatan. Berdasarkan kajian yang telah dilakukan menegaskan adanya keterkaitan antara perubahan penggunaan lahan, koefisien limpasan, dan respons hidrologi DAS. Metode yang dilakukan meliputi analisis hidrologi menggunakan data curah hujan maksimum harian tahun 2015–2024 dari enam stasiun hujan, uji statistik dan distribusi frekuensi Log Pearson III, perhitungan intensitas hujan dengan metode Mononobe, serta analisis spasial tutupan lahan berbasis citra Sentinel-2 dan sistem informasi geografis. Debit banjir dihitung menggunakan metode rasional untuk berbagai kala ulang. Hasil analisis menunjukkan terjadinya peningkatan luas kawasan terbangun dan penurunan area resapan yang berdampak pada kenaikan nilai koefisien limpasan dan debit banjir, dengan peningkatan debit sekitar 16% antara tahun awal dan akhir pengamatan. Hasil peneltiian menemukan bahwa perubahan tutupan lahan berpengaruh signifikan terhadap peningkatan debit banjir di Sub-DAS Way Bulok, sehingga diperlukan penerapan pengendalian tata guna lahan dan konservasi DAS untuk menjaga keberlanjutan fungsi hidrologi wilayah.
Co-Authors Afifah Farnela, Tazza Hakiem Sedo Putra, Muhammad Hasibuan, Hotmida R. Isoralla, Isoralla Kurnianingtyas, Erlina Mashuri Mashuri Nurul Fauziah, Selma Rahma Yanda Siska Wulandari, Siska