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All Journal Journal of Advanced Sciences and Mathematics Education Indonesian Journal of Environment and Sustainability Issues
Imanuel Kemenangenta Perangin Angin
Politeknik Negeri Pontianak, Indonesia
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Energy Environmental Science Mathematics Physics Social Sciences

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Performance Evaluation of Urban Drainage Systems Under Sedimentation and Solid Waste Influence Imanuel Kemenangenta Perangin Angin; Doni Febriawan; Rendy; Jeremia Dinata Perangin Angin
Indonesian Journal of Environment and Sustainability Issues Vol. 3 No. 1 (2026): June 2026 | Indonesian Journal of Environment and Sustainability Issues
Publisher : WISE Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70211/ijesi.v3i1.406

Abstract

Urban flooding remains a persistent challenge in developing cities, often attributed not only to insufficient drainage capacity but also to operational issues such as sedimentation and solid waste accumulation. This study aims to evaluate the hydraulic performance of an existing urban drainage system and to determine its capacity in accommodating design discharge generated from rainfall and domestic wastewater in a residential area of Pontianak, Indonesia. The research applies integrated hydrological and hydraulic analyses using both primary and secondary data. Field observations were conducted to obtain channel dimensions, sedimentation levels, and existing physical conditions. Meanwhile, secondary data consisted of ten years of maximum daily rainfall records. Rainfall frequency analysis was carried out using the Gumbel distribution, while rainfall intensity was estimated using the Mononobe method. The rational method was then employed to calculate design discharge, which was compared with the existing channel capacity under both ideal and sediment-affected conditions. The findings reveal that the drainage system is hydraulically capable of conveying the design discharge under optimal conditions. However, the effective capacity is significantly reduced due to sediment deposition, solid waste accumulation, structural deterioration, and uneven road surfaces. These factors collectively reduce flow efficiency and contribute to localized flooding. This study highlights that drainage system performance is strongly influenced by maintenance practices and environmental conditions, emphasizing the need for integrated management strategies to achieve sustainable urban flood mitigation.
Hydrological modelling for urban drainage capacity assessment in a rapidly urbanizing commercial corridor: A case study from Pontianak, Indonesia Ikhwan Arief Purnama; Imanuel Kemenangenta Perangin Angin; Randy Setiawan
Journal of Advanced Sciences and Mathematics Education Vol. 6 No. 3 (2026): Journal of Advanced Sciences and Mathematics Education
Publisher : CV. FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/jasme.v6i3.1384

Abstract

Background: Rapid urbanization has increased impervious surfaces in commercial areas, leading to higher surface runoff and reducing the performance of existing urban drainage systems during intense rainfall events. As a result, many drainage networks are no longer capable of conveying design runoff, increasing the risk of urban inundation and disrupting transportation and commercial activities. Aims: This study aimed to assess the hydraulic capacity of the existing drainage system along Prof. M. Yamin Road, Pontianak, Indonesia, and to develop an optimal drainage design based on hydrological modelling. Methods:  A quantitative approach was employed using field measurements and annual maximum rainfall data collected over a ten-year period (2015–2024). Design rainfall was estimated using the Gumbel frequency distribution, rainfall intensity was calculated using the Mononobe equation, and peak runoff was determined through the Rational Method. The hydraulic performance of the existing drainage channels was subsequently evaluated using Manning's equation by comparing the channel capacity with the estimated design discharge. Results: The estimated design rainfall was 255.13 mm, generating a rainfall intensity of 138.75 mm h⁻¹ and a peak runoff discharge of 1.169 m³ s⁻¹. The drainage channel toward Sutan Syahrir exhibited a capacity of 2.85 m³ s⁻¹ and was hydraulically adequate, whereas the channel toward Kota Baru provided only 0.375 m³ s⁻¹, indicating insufficient capacity to accommodate the design discharge. Conclusion: The integration of hydrological modelling and hydraulic analysis provides a reliable framework for assessing urban drainage capacity and supports evidence-based planning for effective stormwater management in rapidly urbanizing commercial corridors.
Co-Authors Doni Febriawan Ikhwan Arief Purnama Jeremia Dinata Perangin Angin Randy Setiawan Rendy