Huseiny, Mohammad Iqbal
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Analisis Ancaman Banjir pada Sistem Drainase Banger Lama, Kota Pekalongan: Pengaruh Faktor Hujan, Kenaikan Muka Laut, dan Penurunan Tanah Huseiny, Mohammad Iqbal; Kuntoro, Arno Adi; Nugroho, Eka Oktariyanto; Farid, Mohammad; Nurmaulia, Sella Lestari
Jurnal Teknik Sipil Vol 31 No 3 (2024): Jurnal Teknik Sipil - Edisi Desember
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jts.2024.31.3.8

Abstract

Abstract The coastal areas of Pekalongan City face a significant threat due to flooding and tidal surges. The low, flat topography complicates the management of drainage systems, given the relatively gentle land slope. Flooding incidents frequently occur in various parts of Pekalongan City. Furthermore, the global rise in sea levels and land subsidence in the region exacerbate this issue. This study aims to model the drainage system, considering factors such as rainfall, sea level rise, and land subsidence in Pekalongan City. The modeling is conducted by integrating 2D and 1D models using the Personal Computer Storm Water Management Model (PCSWMM) software. The modeling results encompass three parameters: flood depth, flood velocity, and flood duration. Subsequently, a flood hazard map is developed based on the Flood Hazard Index, incorporating these three parameters. Recommendations to address this issue include constructing embankments and flap gates upstream in flood-affected areas, as well as modifying the drainage system to enable gravity-driven water flow downstream without the use of pumps. However, it is essential to note that these recommendations may not be effective in scenarios involving significant land subsidence. This research is anticipated to assist stakeholders in making informed decisions regarding the management of the drainage system in Pekalongan City. Keywords: Drainage, PCSWMM, flood, sea level rise, land subsidence
Strategi Pengendalian Banjir Sungai Banger Kota Pekalongan terhadap Penurunan Muka Tanah dan Kenaikan Muka Laut Alfajar, Gilang; Kuntoro, Arno Adi; Yasinta, Nur Laili; Rahman, Irfie Lutfiah Aulia; Nugroho, Eka Oktariyanto; Rosyidi, Imron; Nurmaulia, Sella Lestari; Huseiny, Mohammad Iqbal
JURNAL TEKNIK HIDRAULIK Vol 16, No 2 (2025): Jurnal Teknik Hidraulik
Publisher : Direktorat Bina Teknik Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32679/jth.v16i2.847

Abstract

Pekalongan City, located on the northern coast of Central Java, is vulnerable to flooding due to high rainfall, low land elevation, land subsidence, sea level rise, and uncontrolled human activities. The Banger River, originally constructed as an artificial river to reduce flooding from the Loji River, has now become a source of flooding. This study aims to identify technical flood control solutions for the Banger River using spatial, hydrological, tidal, and hydraulic analyses supported by hydraulic flow modeling software. Twenty years of rainfall data, spatial data, river geometry, and tidal information were used to simulate existing and projected long-term conditions. The design flood discharge with a 20-year return period was calculated at 281,9 cubic meters per second, resulting in an average inundation of 0,27 meters, which may rise to 0,85 meters within the next ten years due to land and sea level changes. Three alternatives were evaluated: normalization with earth embankment, a combination of normalization and parapet, and parapet-only implementation. Results indicate that using parapets, or combining them with river normalization and embankments, offers the most technically effective flood control solution in both short and long terms. Overall, the study emphasizes the need for adaptive flood management strategies in coastal urban areas. It is recommended that local governments integrate structural measures with nonstructural policies, such as land use regulation and public awareness, to ensure sustainable flood risk reduction.