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Assessment of Coastal Vulnerability to Support Mangrove Restoration in the Northern Coast of Indramayu Regency Nabila Fathimatuzzahra; Yudi Setiawan; Syamsul Bahri Agus
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol 16 No 3 (2026): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (JPSL)
Publisher : Pusat Penelitian Lingkungan Hidup, IPB (PPLH-IPB) dan Program Studi Pengelolaan Sumberdaya Alam dan Lingkungan, IPB (PS. PSL, SPs. IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.16.3.423

Abstract

Indramayu Regency, a low-lying coastal area in West Java, has experienced substantial mangrove deforestation. Climate change, worsened by global warming, which causes rising sea levels, has made coastal ecosystems vulnerable. Mangroves play an important role in preventing ecological imbalance in coastal ecosystems and play a role in securing local livelihoods. Considering the dense population on the Indramayu coast, it is imperative to conduct vulnerability mapping as a decision support for policymakers to implement sustainable coastal management in Indramayu. This study aimed to develop a Coastal Vulnerability Index (CVI) for the Indramayu coastal ecosystem using a geospatial analysis of multiple parameters: geomorphology, shoreline change rates, sea level rise, wave height, coastal slope, and tidal range. The methodology employed a grid-based approach (4×4 km²) along the coastline to identify priority zones for restoring mangroves. This study also included the Mangrove Vulnerability Index (MVI) assessment and combined it with relevant policy documents to provide recommendations for mangrove restoration efforts. The results indicate severe coastal vulnerability, with 37.14% of the area classified as highly vulnerable. In contrast, mangrove ecosystems showed greater resilience, with 77.14% of the grids categorized as having low vulnerability. These findings provide science-based recommendations for policymakers to prioritize resource allocation in mangrove restoration programs.
Evaluating Accuracy and Temporal Consistency of Machine Learning Models for Land Use/Land Cover Mapping in the Cimanuk Watershed Salis Deris Artikanur; Widiatmaka; Wiwin Ambarwulan; Irmadi Nahib; Darmawan Listya Cahya; Afifuddin; Yudi Setiawan
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol 16 No 3 (2026): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (JPSL)
Publisher : Pusat Penelitian Lingkungan Hidup, IPB (PPLH-IPB) dan Program Studi Pengelolaan Sumberdaya Alam dan Lingkungan, IPB (PS. PSL, SPs. IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.16.3.284

Abstract

One of the critical watersheds in Indonesia is the Cimanuk watershed, which is recognized as a national priority watershed. Remote sensing plays a vital role in monitoring land use/land cover (LULC) in the Cimanuk watershed. Overall Accuracy (OA) and Kappa Accuracy (KA) are commonly used as primary measures of classification accuracy. In addition to these parameters, it is essential to examine the consistency and rationality of LULC classification over time. This study aimed to compare the accuracy and temporal consistency of three Machine Learning Models: Random Forest (RF), Support Vector Machine (SVM), and Classification and Regression Tree (CART) for LULC classification in the Cimanuk watershed using Sentinel-2 Multispectral Instrument (MSI) images for 2020 and 2025, processed in Google Earth Engine (GEE). The results indicate that RF has the highest accuracy, with 87.9% (OA) and 83.7% (KA) in 2025, and 83.6% (OA) and 77.9% (KA) in 2020. When examining inconsistent or irrational transitions between 2020 and 2025, CART accounted for 11.97% of these transitions, higher than RF and SVM. After applying temporal consistency correction to the 2020 LULC classification result, RF remains the best-performing classifier, achieving 90% (OA) and 86.5% (KA), followed by CART and SVM. These findings provide valuable insights into incorporating accuracy and temporal consistency assessments into time-series LULC analysis, serving as a reference for future LULC studies in watershed management and other geographic contexts.