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All Journal Jurnal Geocelebes Jurnal Teknik Sipil Macca
Hasudungan, Harsan Ingot
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Engineering

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Assessment of Ground Deformation and Landslide Susceptibility Using InSAR and Hypsometric Data in Jayapura City, Papua Anas, Nur Ayu; Hasudungan, Harsan Ingot; Indrajati, Rahmat; Yonas, Marcelino N.; Hutami, Harnanti Y.
JURNAL GEOCELEBES Vol. 9 No. 2: October 2025
Publisher : Departemen Geofisika, FMIPA - Universitas Hasanuddin, Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70561/geocelebes.v9i2.45404

Abstract

Ground deformation and landslides are major geohazards affecting Jayapura City, Papua, due to its active tectonic setting and steep topography. This study aims to assess the correlation between surface deformation and landslide susceptibility using a combination of Interferometric Synthetic Aperture Radar (InSAR) and hypsometric analysis. Sentinel-1A SAR data from ascending and descending tracks, combined with DEMNAS elevation data, were used to detect deformation patterns and evaluate geomorphological maturity through hypsometric parameters. The results reveal significant deformation patterns, including subsidence up to –0.77 m and uplift up to +0.25 m, predominantly concentrated in sub-watersheds Sw2, Sw3, and Sw4. Hypsometric analysis indicates that most sub-watersheds are in the mature geomorphological stage (HI between 0.476 and 0.495), except Sw14, which is classified as young (HI = 0.501). Validation with the landslide inventory further confirms this correlation: 75% of documented landslides occurred in areas of high deformation, while 25% were associated with moderate deformation, and none in low or stable zones. These findings provide essential insights for disaster risk reduction, highlighting priority areas for slope stabilization, land-use management, and early warning systems.
Pengaruh Rendaman Air Laut Terhadap Karakteristik Kuat Tekan dan Stabilitas Campuran Beton Aspal di Wilayah Pesisir Papua Selni Prawardani, Dinda Sekar; Hasudungan, Harsan Ingot; Tambunan, David Edgar
Jurnal Teknik Sipil MACCA Vol. 10 No. 3 (2025): Jurnal Teknik Sipil MACCA (OKTOBER 2025)
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33096/neqswc66

Abstract

Penelitian ini bertujuan menganalisis pengaruh rendaman air laut terhadap karakteristik beton aspal dengan menggunakan parameter utama Indeks Kekuatan Sisa (IKS). Latar belakang penelitian ini adalah kondisi jalan di wilayah pesisir yang sering terendam air laut dan menyebabkan penurunan daya tahan lapisan perkerasan. Metode yang digunakan adalah pengujian Marshall dengan variasi lama rendaman (0, 6, 12, 24, dan 48 jam) pada media air laut dan air tawar. Parameter yang diuji meliputi Stabilitas, Flow, Density, Marshall Quotient (MQ), dan IKS. Hasil pengujian menunjukkan bahwa semakin lama durasi perendaman, nilai stabilitas, flow, dan MQ cenderung menurun, dengan penurunan lebih besar pada rendaman air laut. Penurunan ini disebabkan oleh kandungan garam (NaCl) yang mengurangi adhesi antara aspal dan agregat. Meskipun terjadi penurunan, nilai IKS hingga 48 jam masih memenuhi batas minimum spesifikasi Bina Marga 2018 sebesar 90%. Hasil ini menunjukkan bahwa air laut memiliki pengaruh signifikan terhadap penurunan durabilitas beton aspal, sehingga diperlukan modifikasi campuran atau penggunaan material alternatif agar lebih tahan terhadap lingkungan laut.
Co-Authors Anas, Nur Ayu Hutami, Harnanti Y. Indrajati, Rahmat Marcelino N. Yonas Selni Prawardani, Dinda Sekar Tambunan, David Edgar