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All Journal Jurnal Konstruksia AGREGAT Ge-STRAM: Jurnal Perencanaan dan Rekayasa Sipil Publikasi Riset Orientasi Teknik Sipil (Proteksi) Tameh : Journal of Civil Engineering
Anna Rosytha
Universitas Muhammadiyah Surabaya
Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Engineering Environmental Science Transportation

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Analysis of Changes in the Coastal Dynamics of Watu Gedek and Muara Gede in Lumajang Regency Using Multi-Temporal Satellite Data and Spatial Analysis: Analisis Perubahan Dinamika Garis Pantai Watu Gedek dan Muara Gede Kabupaten Lumajang Menggunakan Data Satelit Multi-Temporal dan Analisis Spasial Anna Rosytha; Zainal Abidin; Arifien Nursandah Nursandah
PUBLIKASI RISET ORIENTASI TEKNIK SIPIL (PROTEKSI) Vol 8 No 1 (2026): Vol 8 No 1 Tahun 2026
Publisher : Universitas Negeri Surabaya

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Abstract

The southern coastal area of Lumajang Regency experiences high shoreline dynamics due to Indian Ocean waves, ocean currents, river mouth sedimentation, and human activities. Shoreline changes in the form of erosion and accretion affect coastal geomorphology, ecosystem stability, and socio-economic activities. This study aims to analyze shoreline dynamics in the Watu Gedek and Muara Gede areas, Tempursari District, Lumajang Regency, using Landsat imagery from 2020–2025. The methods include shoreline extraction using MNDWI, quantitative analysis with the Digital Shoreline Analysis System (DSAS), and prediction approaches using QSCAT and Random Forest machine learning. The analyzed parameters include NSM, EPR, LRR, and SCE. The results show that erosion dominates approximately ±74% of the transects, with a maximum rate of -11.49 m/year. The most severe erosion occurs in the central segment, while limited accretion occurs in the eastern and western parts with rates up to +2.45 m/year due to local sediment supply. QSCAT and Random Forest results show consistent patterns with DSAS. These findings highlight the importance of adaptive and spatial-data-based coastal management.
Co-Authors Arifien Nursandah Arifien Nursandah Nursandah Cristiyan, Anton Dayat Indri Yuliastuti Miftachul Huda Mochamad Ismianto MUHAMMAD TAUFIK Ramadhani, Safira Ramadhani, Safira Suryana, Wiel Mushawiry Suryana, Wiel Musyawiri Warella, Kristian M Yuliastuti, Dayat Indri Zainal Abidin