Analysis of shoreline changes along the coastal area of Biak Island (Biak Numfor Regency, Indonesia) using multitemporal Landsat images

Rumahorbo, Basa T.; Warpur, Maklon; Hamuna, Baigo; Tanjung, Rosye H.R.

doi:10.15243/jdmlm.2022.101.3861

Cited by 3 publications

(3 citation statements)

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“…Coastal erosion and the reduction of sand volume in the coastal areas increase yearly. Significant changes in the coastline pose a severe threat to settlements and public facilities (Rumahorbo et al, 2022). This indicates the need for preventive actions and better environmental management strategies (Hanley et al, 2014;Ranasinghe, 2016).…”

Section: Discussionmentioning

confidence: 99%

Study of coastal land change in sand mining activities in Bandar Batauga Village, South Buton Regency, Indonesia

Mappasomba,

Suleman

2024

J. Degrade. Min. Land Manage.

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This research focused on land changes in Bandar Batauga Village, South Buton Regency, Indonesia, related to environmentally damaging sand mining activities. The primary objective of this research was to analyze land evolution in coastal settlement areas vulnerable to disasters, with an emphasis on the impact of sand mining until the year 2050. The research methods encompassed quantitative and qualitative approaches, including coastal change analysis using ArcGIS, in-depth interviews, and statistical methods. The research findings highlighted a significant increase in coastline changes, reaching an erosion area of 511.3 m² in 2022. Projections until 2050 indicate a potential maximum erosion of 1,157.22 m². This research employed the analytic hierarchy process, focusing on social, economic, physical, and biotic environmental aspects to formulate disaster mitigation strategies. However, implementing environmental management policies faces challenges, such as a lack of competence in relevant departments and low awareness among mining permit owners. Therefore, strategic recommendations involve enhancing human resource capacity, strengthening oversight, and providing economic support as critical steps to reduce mining activities.

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Section: Discussionmentioning

confidence: 99%

Study of coastal land change in sand mining activities in Bandar Batauga Village, South Buton Regency, Indonesia

Mappasomba,

Suleman

2024

J. Degrade. Min. Land Manage.

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“…Changes in the coastline at the study location refer to the results of the authors' previous research [Rumahorbo et al, 2022], where the determination of the coastline used several satellite image datasets because the study area was large and Landsat images which were free of cloud cover were not available.…”

Section: Data Acquisition and Processingmentioning

confidence: 99%

Spatial Analysis of Coastal Vulnerability Index to Sea Level Rise in Biak Numfor Regency (Indonesia)

Rumahorbo¹,

Warpur²,

Tanjung³

et al. 2023

J. Ecol. Eng.

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Assessing the vulnerability of coastal areas is important in evaluating impact of sea level rise due to global climate change. This study aimed to spatially analyze and map the vulnerability level of the Biak Numfor Regency's coastal area on Biak Island to the threat of sea level rise. The study area is limited to 500 m from the coastline and is divided into 383 grid cells. The Coastal Vulnerability Index (CVI) method was used to map the level of vulnerability of coastal areas based on four coastal geological variables (coastal elevation, coastal slope, geomorphology, and shoreline change) and three ocean physical process variables (tidal range, average significant wave height, and relative sea level rise). The results showed that the coastal areas of Biak Numfor Regency, belonging to the low, medium and high-risk vulnerability categories, were 77,685.63 km (32.18%), 159,084.38 km (65.74%), and 5,024.96 km (2.08%), respectively. The variables that contribute significantly to the level of vulnerability are coastal elevation, coastal slope, coastal geomorphology, and shoreline changes due to abrasion compared to tidal range, significant wave heights, and sea level rise rates. Vulnerability studies of other variables that can contribute to the vulnerability of coastal areas are needed, such as socio-economic variables and the impact of human activities on changes in the coastal environment, to obtain a comprehensive CVI value in supporting coastal mitigation planning efforts against sea level rise disasters so that they are more focused.

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“…Perubahan garis pantai yang terjadi di wilayah pesisir akan lebih mudah dideteksi dan dianalisis menggunakan teknik geospasial yang mengkombinasikan penginderaan jauh satelit dan Sistem Informasi Geografis (Yulianto et al, 2019; A C R O P O R A Koulibaly dan Ayoade, 2021, Rumahorbo et al, 2022 atau menggunakan Digital Shoreline Analysis System (DSAS) (Thieler et al, 2009;Mutaqin, 2017;Rumahorbo et al, 2022). Saat ini, DSAS merupakan metode yang efektif dan akurat untuk mendeteksi dan menghitung perubahan garis pantai secara otomatis (Kankara et al, 2015;Nhan et al, 2018;Elnabwy et al, 2020;Nath et al, 2021;Koulibaly dan Ayoade, 2021).…”

Section: Pendahuluanunclassified

Analisis Perubahan Garis Pantai Menggunakan Digital Shoreline Analysis System: Studi Kasus Wilayah Pesisir Kota Jayapura, Provinsi Papua

Hamuna

Kalor²

2022

ACR

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Study of shoreline change is an important step in understanding the dynamics in the coastal area in Jayapura City and is a first step to reduce the risk of coastal erosion and also minimize social, physical and economic losses. This research was conducted in the coastal area of Yos Sudarso Bay, Jayapura City, Papua Province by utilizing multi-temporal Landsat satellite imagery (Landsat 5 TM, Landsat 7 ETM+ and Landsat 8 OLI-TIRS) for 1994, 2000, 2007, 2014 and 2020. Analysis Shoreline changes are determined using the Digital Shoreline Analysis System (DSAS). End Point Rate (EPR), Net Shoreline Movement (NSM) and Linear Regression Rate (LRR) are used to calculate the rate of change of the coastline and predictions of change of the coastline for the next 10 years. The results showed that in the period 1994-2000 there was an area of 535749.22 m2 of abrasion and 399361.87 m2 of accretion. During the 2000-2007 period, 453,876.10 m2 of abrasion occurred and 447,121.39 m2 of accretion. In the 2007-2014 period there was 781,274.83 m2 of abrasion and 259,221.26 m2 of accretion. In the 20014-2020 period, 93,328.79 m2 of abrasion occurred and 74,204.42 m2 of accretion. Spatially, the coastal areas of Yos Sudarso Bay, Jayapura City, which experienced abrasion included Holtekamp Beach, Hamadi Beach, and a small part in Youtefa Bay, while those that experienced accretion included DOK II Beach, Entrop Beach, Ciberi Beach, in Youtefa Bay and Cape Ria. The shoreline changes rate (LRR) in the coastal area of Yos Sudarso Bay, Jayapura City due to abrasion in the period 1994 to 2020 is 0.89 m/year, while the shoreline change rate due to accretion is 0.70 m/year. Based on the prediction of shoreline changes at Holtekamp Beach, it is predicted that the highest abrasion will occur as far as 50.19 m with an average abrasion distance of 20.22 m, while the highest accretion is as far as 19.19 m with an average accretion distance of 10.55 m.

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Analysis of shoreline changes along the coastal area of Biak Island (Biak Numfor Regency, Indonesia) using multitemporal Landsat images

Cited by 3 publications

References 0 publications

Study of coastal land change in sand mining activities in Bandar Batauga Village, South Buton Regency, Indonesia

Study of coastal land change in sand mining activities in Bandar Batauga Village, South Buton Regency, Indonesia

Spatial Analysis of Coastal Vulnerability Index to Sea Level Rise in Biak Numfor Regency (Indonesia)

Analisis Perubahan Garis Pantai Menggunakan Digital Shoreline Analysis System: Studi Kasus Wilayah Pesisir Kota Jayapura, Provinsi Papua

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