Analisis Pola Angin dengan Model 3 Dimensi dan Hubungannya dengan Mikroiklim di Koridor Pedestrian Jalan Tunjungan

Marbun, Joseph Frederick (2026) Analisis Pola Angin dengan Model 3 Dimensi dan Hubungannya dengan Mikroiklim di Koridor Pedestrian Jalan Tunjungan. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Kawasan Jalan Tunjungan sebagai koridor warisan budaya dengan densitas bangunan tinggi menghadapi tantangan mikroklimat signifikan berupa peningkatan suhu permukaan dan stagnasi aliran udara. Penelitian ini bertujuan untuk menganalisis ketelitian geometris model 3D Level of Detail (LOD) 2 berbasis teknologi UAV LiDAR, serta mengevaluasi karakteristik aerodinamika dan kenyamanan termal kawasan guna merumuskan strategi mitigasi desain kota. Metode penelitian mengintegrasikan akuisisi data spasial menggunakan sensor DJI L2 dan simulasi mikroklimat berbasis Computational Fluid Dynamics (CFD) menggunakan perangkat lunak ENVI-met. Hasil validasi geometri menunjukkan bahwa rekonstruksi model 3D memiliki akurasi tinggi dengan nilai Root Mean Square Error (RMSE) vertikal sebesar 0,268 meter, yang memenuhi standar ketelitian Open Geospatial Consortium (OGC). Analisis profil angin mengungkapkan dominasi fenomena Skimming flow akibat tingginya Koefisien Dasar Bangunan (KDB >80%), di mana arus angin utama terhalang massa bangunan masif dan gagal berinfiltrasi ke level jalan. Hal ini menciptakan zona stagnasi udara dengan kecepatan kritis di bawah 0,5 m/s, yang memicu kondisi Extreme Heat Stress dengan nilai Physiological Equivalent Temperature (PET) mencapai maksimum 59,3°C pada area terbuka. Penelitian ini menyimpulkan bahwa morfologi bangunan yang rapat menjadi faktor determinan buruknya ventilasi mikro. Sebagai solusi, direkomendasikan strategi intervensi fisik berupa penerapan geometri bangunan berundak (stepping mass), penyediaan lorong angin (breezeway) antar bangunan minimal 4 meter, serta penataan vegetasi peneduh bertajuk tinggi seperti Angsana atau Trembesi. Strategi ini terbukti krusial untuk memulihkan porositas angin (wind porosity) dan meningkatkan kualitas kenyamanan termal pejalan kaki di kawasan padat perkotaan.
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The Tunjungan Street area, as a cultural heritage corridor characterized by high building density, faces significant microclimatic challenges, specifically elevated surface temperatures and airflow stagnation. This study aims to analyze the geometric accuracy of a 3D Level of Detail (LOD) 2 model derived from UAV LiDAR technology, while evaluating aerodynamic characteristics and thermal comfort to formulate urban design mitigation strategies. The research methodology integrates spatial data acquisition using the DJI L2 sensor with microclimate simulations based on Computational Fluid Dynamics (CFD) using ENVI-met software. Geometric validation results demonstrate high accuracy in the 3D model reconstruction, achieving a vertical Root Mean Square Error (RMSE) of 0.268 meters, which complies with the Open Geospatial Consortium (OGC) accuracy standards. Wind profile analysis reveals the dominance of the Skimming flow phenomenon due to a high Building Coverage Ratio (BCR >80%), where the prevailing wind is obstructed by massive building structures and fails to infiltrate the street level. This condition creates a stagnant air zone with critical velocities below 0.5 m/s, triggering Extreme Heat Stress conditions with Physiological Equivalent Temperature (PET) values peaking at 59.3°C in open areas. The study concludes that dense building morphology is the determinant factor contributing to poor micro-ventilation. Consequently, physical intervention strategies are recommended, including the implementation of stepping mass geometry, the provision of breezeways between buildings (minimum 4 meters), and the arrangement of high-canopy shading vegetation such as Pterocarpus indicus (Angsana) or Samanea saman (Rain Tree). These strategies are proven crucial for restoring wind porosity and enhancing pedestrian thermal comfort quality in dense urban environments.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	UAV LiDAR, Model 3D LOD 2, Mikroklimat Perkotaan, Skimming flow, Physiological Equivalent Temperature (PET), UAV LiDAR, 3D Model LOD 2, Urban Microclimate, Skimming flow, Physiological Equivalent Temperature (PET)
Subjects:	G Geography. Anthropology. Recreation > G Geography (General) > G70.212 ArcGIS. Geographic information systems. G Geography. Anthropology. Recreation > G Geography (General) > G70.217 Geospatial data G Geography. Anthropology. Recreation > G Geography (General) > G70.5.I4 Remote sensing T Technology > TD Environmental technology. Sanitary engineering > TD171.75 Climate change mitigation
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geomatics Engineering > 29101-(S2) Master Thesis
Depositing User:	Joseph Frederick Marbun
Date Deposited:	28 Jan 2026 02:39
Last Modified:	28 Jan 2026 02:39
URI:	http://repository.its.ac.id/id/eprint/130849

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