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Analisis Laju Perubahan Garis Pantai Pulau Karimun Besar Menggunakan DSAS (Digital Shoreline Analysis System) Dian Kharisma Dewi; Sigit Sutikno; Rinaldi Rinaldi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Shoreline changes could occurred because of hydrodinamically nature in coastal zone. The purpose of this study is to identify and approximating rate of shoreline changes which occurred in Karimun Besar Island. This study used to analyzed shoreline changesbased on remote sensing (satellite) data that processed by GIS (Geographic Information System). Then, to analyze the rate of its shoreline changes using DSAS (Digital ShorelineAnalysis System) with LRR (Linear Regression Rate) statistic method. The result found that shoreline has changes through 25 years (1991-2016) that abrasions are 1,63m/y and accretions are 3,78m/y.Keywords : Shoreline Changes, Satellite Data, DSAS
Identifikasi Karakteristik Spasio-Temporal Hujan Ekstrem di Tanjungpinang Menggunakan Google Earth Engine (GEE) Dian Kharisma Dewi; Sigit Sutikno; Lita Darmayanti
Jurnal Teknik Sipil dan Teknologi Konstruksi Vol 8, No 2 (2022): Jurnal Teknik Sipil dan Teknologi Konstruksi
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (763.381 KB) | DOI: 10.35308/jts-utu.v8i2.5631

Abstract

In early January 2021, Tanjungpinang was hit by floods due to extreme rainfall intensity, causing the affected communities to suffer material and non-material losses. The flood has occurred from 2011 to 2021. To minimize the impact of flood events, it is necessary to study the characteristics of rainfall both temporally and spatially. This is considered important because with this information the public can anticipate the impact of extreme rainfall at a certain time and location. This study aims to identify the Spatio-temporal characteristics of extreme rainfall in Tanjungpinang City which often causes floods. However, to identify the characteristics of rainfall, long data is needed. This study uses CHIRPS (Climate Hazards InfraRed Precipitation with Station) satellite data because the rainfall observation data at the Raja Haji Fisabilillah station is not available for 2012. The identification results show that the correlation criterion (R) value between rainfall observation data and CHIRPS satellite data is 0.688. This value is interpreted as "strong" to be used as an alternative study data. GEE (Google Earth Engine) as a cloud-based platform is used to identify the spatial and temporal characteristics of extreme rainfall. From the results of temporal identification, it is known that extreme rainfall occurs in January, April, and December. The results of spatial identification indicate that the area that has the highest average maximum rainfalls at the Bukit Bestari District area of 156.60 mm/day. This can then be confirmed by looking at the documentation of flood events that often occur in the area.
Integrating Blue Carbon Estimation into Mangrove-Based Coastal Protection Infrastructure Planning: A Case Study in Dompak Island, Tanjungpinang Dian Kharisma Dewi; Sapta Nugraha
Jurnal Inovasi Teknologi Vol 6 No 1 (2025): April
Publisher : Engineering Forum of Western Indonesian Government Universities Board (Forum Teknik, BKS-PTN Wilayah Barat) Indonesia

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Abstract

Ecosystem-based coastal protection offers a strategic approach to mitigating the impacts of climate change, particularly in small island contexts. This study integrates remote sensing and geospatial analysis to estimate blue carbon stocks in the mangrove ecosystems of Dompak Island, Tanjungpinang, using Google Earth Engine (GEE) and Sentinel-2 satellite imagery. Through the application of the Normalized Difference Vegetation Index (NDVI) and an empirical model for Above Ground Biomass (AGB), spatial carbon stock distributions were generated and classified into three functional zones: conservation, restoration, and critical protection. Results reveal that areas with moderate vegetation exhibit the highest carbon stock (32.00 tons/ha), suggesting ongoing biomass accumulation. This spatial analysis informs a zoning framework that supports ecosystem-based infrastructure planning. The integration of carbon mapping with adaptive civil engineering strategies demonstrates a scalable model for climate-resilient coastal development in vulnerable regions.
Stabilization of Coastal Embankments with Geotextile and Gabion Structures: Insights from a Tidal Zone Road Project Dian Kharisma Dewi; Ferly Oktavia
Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan Vol 10 No 2 (2025): SEPTEMBER
Publisher : Program Studi Teknik Sipil, Fakultas Teknik, Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/cvl.v10i2.1457

Abstract

This study presents a technical overview of a coastal road embankment constructed in a tidal zone of a small island in Indonesia. The objective is to document the integrated application of non-woven geotextile and multi-level gabions as a stabilization system on moderately strong subgrade soils affected by tidal dynamics. The research method involved descriptive analysis based on as-built documentation and field data, including California Bearing Ratio (CBR) tests at three locations. The results showed CBR values ranging from 41.11% to 60.84%, which classify the subgrade as moderately strong. Despite this, the use of geotextile was essential to prevent mixing of soft subgrade and fill material, provide load distribution, and ensure drainage, while the gabion structures acted as lateral confinement and toe protection against erosion caused by tidal infiltration. The findings suggest that soil strength alone is insufficient for coastal infrastructure design, and integrated stabilization measures should account for environmental forces such as saturation cycles and hydraulic pressure. This case offers a practical insight into adaptive geotechnical strategies for road construction in tidal zones, serving as a reference for similar projects in archipelagic and low-lying coastal regions.