Pemetaan Kawasan Banjir Menggunakan Data Point Cloud Lidar Berbasis UAV (Studi Kasus: Desa Tropodo, Kecamatan Waru)

Faiz, Brilliant Sahasika Al (2026) Pemetaan Kawasan Banjir Menggunakan Data Point Cloud Lidar Berbasis UAV (Studi Kasus: Desa Tropodo, Kecamatan Waru). Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Banjir merupakan permasalahan yang sering terjadi pada kawasan permukiman padat, termasuk di Desa Tropodo, Kecamatan Waru, Kabupaten Sidoarjo. Curah hujan tinggi, kondisi topografi yang relatif datar, dominasi permukaan kedap air, serta keterbatasan jalur pelolosan air menyebabkan terjadinya genangan pada beberapa lokasi. Penelitian ini bertujuan untuk membangun model topografi dengan data point cloud LiDAR serta menganalisis sebaran genangan banjir di kawasan Perumahan Wisma Tropodo. Akuisisi data dilakukan menggunakan UAV DJI Matrice 350 RTK dengan sensor DJI Zenmuse L2. Titik kontrol tanah diukur menggunakan metode GNSS statik dan digunakan sebagai Ground Control Point (GCP) serta Independent Check Point (ICP). Data point cloud hasil rekonstruksi diolah menjadi Digital Surface Model (DSM), Digital Terrain Model (DTM), dan Normalized Digital Surface Model (nDSM). Selanjutnya, simulasi genangan dilakukan menggunakan metode 2D Unsteady Flow Simulation dengan data topografi, curah hujan, tutupan lahan, dan koefisien kekasaran Manning. Hasil rekonstruksi menunjukkan nilai RMSE vertikal sebesar 0,019 m. Uji ketelitian independen menggunakan ICP menghasilkan nilai RMSEz sebesar 0,0966 m dan LE90 sebesar 0,1589 m, sehingga memenuhi ketelitian vertikal peta dasar skala 1:1.000 Kelas 1. Simulasi dengan skenario curah hujan 60 mm/hari, 100 mm/hari, dan 120 mm/hari menghasilkan kedalaman genangan maksimum sebesar 0,30 m, 0,39 m, dan 0,41 m. Genangan cenderung terkonsentrasi pada koridor jalan dan area cekungan. Hasil penelitian menunjukkan bahwa data LiDAR berbasis UAV dapat digunakan untuk mendukung pemodelan genangan banjir serta evaluasi awal penataan drainase di kawasan permukiman padat.
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Flooding is a recurring problem in densely populated residential areas, including Tropodo Village, Waru District, Sidoarjo Regency. High rainfall, relatively flat topography, extensive impervious surfaces, and limited drainage pathways contribute to inundation in several locations. This study aims to develop a three-dimensional topographic model using UAV-based LiDAR point cloud data and to analyze flood inundation distribution in the Wisma Tropodo Housing Area. Data acquisition was conducted using a DJI Matrice 350 RTK UAV equipped with a DJI Zenmuse L2 sensor. Ground control points were measured using the static GNSS method and used as Ground Control Points (GCPs) and Independent Check Points (ICPs). The reconstructed point cloud data were processed to generate a Digital Surface Model (DSM), Digital Terrain Model (DTM), and Normalized Digital Surface Model (nDSM). Flood inundation simulation was then conducted using the 2D Unsteady Flow Simulation method in HEC-RAS software by considering topographic data, rainfall, land cover, and Manning’s roughness coefficients. The reconstruction results showed a vertical RMSE of 0.019 m. Independent accuracy assessment using ICPs produced an RMSEz of 0.0966 m and an LE90 of 0.1589 m, meeting the vertical accuracy requirement for a 1:1,000 scale base map, Class 1. Simulations under rainfall scenarios of 60 mm/day, 100 mm/day, and 120 mm/day produced maximum inundation depths of 0.30 m, 0.39 m, and 0.41 m, respectively. Inundation tended to concentrate along road corridors and areas with relatively low elevations. The results indicate that UAV-based LiDAR data can support flood inundation modeling and preliminary drainage improvement evaluation in densely populated residential areas.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Banjir, Lidar, 2D Unsteady Flow Simulation Flood, Lidar, 2D Unsteady flow simulation
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA590 Topographical surveying T Technology > TC Hydraulic engineering. Ocean engineering > TC424 Water levels T Technology > TC Hydraulic engineering. Ocean engineering > TC530 Flood control
Divisions:	Faculty of Civil Engineering and Planning > Geomatics Engineering > 29202-(S1) Undergraduate Thesis
Depositing User:	Brilliant Sahasika Al Faiz
Date Deposited:	21 Jul 2026 00:58
Last Modified:	21 Jul 2026 00:58
URI:	http://repository.its.ac.id/id/eprint/135784

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