Short- and medium-term coastal abrasion and accretion rate analysis using GIS in Karawang, West Java

Siburian

IOP Conf. Ser.: Earth Environ. Sci.

2022

The coastal area of Maruni at Manokwari Regency is known for its potential as a fish-producing area, industry, settlements, ports, and others. However, some parts of Maruni coastal areas have been damaged due to the development. The coastal area experienced changes caused by both natural processes and human activities. The presence of natural and artificial processes in coastal areas results in accretion and abrasion. The dynamics of oceanographic pressures such as sea tidal, sea waves, ocean currents, and tides occurring in the Maruni Beach area cause changes in the movement of sediments affecting the coastal area. Continuous changes can be a threat to Maruni coastal line as the Trans Papua Barat Road passed this route. This research was conducted with the aim to quantify the rate of coastline changes and oceanographic dynamics of Maruni coastal line at the south part of Manokwari Regency, Papua Barat Province from 1995 to 2021. The utilization of remote sensing interpretation method from Landsat 5 TM, Landsat 8 OLI, and oceanographic data providers (BIG, ECMWF) accommodated data source. The analysis result concluded that changes in the coastline at Maruni Coastal line during the 1995-2021 period predominantly encountered abrasion. The magnitude rate of change experienced a very small accretion, but was replaced by a very high abrasion event that occurred during two observation periods between 1995-2021.

Section: Figure 3 Abrasion Cause Damage To Barriermentioning

confidence: 99%

The analysis of coastline changes of maruni beach in Manokwari during 1995-2021 period

Siburian

IOP Conf. Ser.: Earth Environ. Sci.

2022

“…Hasil perubahan garis pantai di Kabupaten Karawang berdasarkan pengamatan citra dari tahun 1990 -2018 dan perhitungan aplikasi DSAS menunjukkan perubahan akresi yang lebih tinggi dibandingkan dengan abrasi, baik perubahan luas maupun laju perubahannya. Beberapa penelitian terkait perubahan garis pantai di Kabupaten Karawang diantaranya adalah Usman (2009), Fauzie (2017), serta Ihsan dan Pin (2019). Usman (2009) membandingkan dua peta garis pantai dari peta Bakosurtanal tahun 1990 dan peta Bappeda Kabupaten Karawang tahun 2005, hasil perbandingan selanjutnya diobservasi melalui pengamatan di lapangan.…”

Section: Analisis Perubahan Garis Pantaiunclassified

“…Penelitian oleh Fauzie (2017), menunjukkan perubahan garis pantai antara tahun 1988 -1997, dominan akresi antara tahun 1997 -2006, dan dominan abrasi antara tahun 2006 -2015. Di dalam penelitian oleh Fauzie (2017) ini, perubahan garis pantai dalam jangka menengah (1988 -2015) menunjukkan laju abrasi di atas 15 ha/tahun, dan laju akresi dua kali lipat dari laju abrasi di periode yang sama. Perbedaan waktu pengamatan dalam analisis perubahan garis pantai di dalam penelitian ini dengan dua penelitian sebelumnya memberikan hasil yang hampir serupa.…”

Section: Analisis Perubahan Garis Pantaiunclassified

“…Hasil Usman (2009) dan Fauzie (2017) berkesesuaian dengan penelitian saat ini, dimana proses akresi dominan dibandingkan abrasi. Laju akresi dalam penelitian ini lebih besar dibandingkan laju abrasi, meskipun belum sampai dua kali lipatnya (seperti dalam Fauzie, 2017 Akresi pantai terjadi karena proses transportasi sedimen dari area lain yang terjadi abrasi. Proses akresi juga timbul karena adanya transportasi sedimen sepanjang pantai sebagai akibat proses fisik arus yang bergerak sepanjang pantai.…”

Section: Analisis Perubahan Garis Pantaiunclassified

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Deteksi Perubahan Garis Pantai di Pesisir Kabupaten Karawang dengan Aplikasi Digital Shoreline Analysis System (DSAS)

Setiabudi

Maryanto

2020

ABSTRAKPerubahan garis pantai di wilayah pesisir Kabupaten Karawang hampir mencapai 50% dari panjang garis pantai yang ada saat ini. Perubahan dalam bentuk abrasi dan akresi ini berdampak pada penurunan kualitas hidup masyarakat yang bermukim di sekitar wilayah tersebut. Penelitian ini bertujuan mengetahui jarak dan laju perubahan garis pantai, serta perubahan maksimum abrasi dan akresinya. Perhitungan perubahan garis pantai menggunakan aplikasi Digital Shoreline Analysis System (DSAS) dengan metode statistik Net Shoreline Movement (NSM) dan End Point Rate (EPR). Abrasi terparah terjadi pada segmen 5 di Kecamatan Tirtajaya dan akresi terparah terjadi pada segmen 16 di Kecamatan Cilamaya Wetan. Rata – rata abrasi dari tahun 1990-2018 di pesisir Kabupaten Karawang mencapai 101,28 m dengan laju 3,64 m/tahun. Sedangkan, untuk akresi mencapai 195,63 m dengan laju 7,04 m/tahun. Perbedaan waktu pengamatan dalam analisis perubahan garis pantai dalam penelitian ini dengan penelitian sebelumnya, memberikan hasil berkesesuaian dengan penelitian sejenis sebelumnya, untuk wilayah yang sama.Kata Kunci: garis pantai, DSAS, Kabupaten Karawang, abrasi, akresiABSTRACTCoastline of Karawang Regency changes almost 50% from total length of the coastline. The change is process of abrasion and accretion and it impacts quality of community life in the area. This tudy aims to calculate coastline change in term length of distance and its speed. The calculation uses Digital Shoreline Analysis System (DSAS) with statistical method of Net Shoreline Movement (NSM) and End Point Rate (EPR). Maximum abrasion occurs in segment 5 of Tirtajaya District and maximum accretion occurs in segment 16 of Cilamaya Wetan District. Averaged coastline changes from years of 1990-2018 showed that abrasion has length of 101,28 m and the speed is 3,64 m/year. Meanwhile, accretion has length of 195,63 m and the speed is 7,04 m/year. This research observes the coastline change in different years with other earlier studies, and the results showed agreement with similar studies in the same area.Keywords: coastline, DSAS, Karawang Regency, abrasion, accretion

IOP Conf. Ser.: Earth Environ. Sci.

“…Moreover, it is very worrying in some places [8]. The previous studies of coastal dynamics in the area commonly discussed the interactive working among hydro-oceanographic processes and coastline zone characteristics [9][10][11][12] without any influencing effect of offshore-onshore curtain sediment and coastal infrastructures. Hence, the objective of this paper is to explain the phenomenon of short-term coastal dynamics on the Karawang coastline zone from the point of view of coupled natural resilience process and the hydrodynamic effect of coastal infrastructures.…”

Section: Introductionmentioning

confidence: 99%

Interdisciplinary approach for qualitatively monitoring coastline dynamics in North Java Coast, Case study: Karawang Regency Indonesia

Novico¹,

Siddik²,

Lufiandi³

et al. 2021

The coast of north Java is the most rapid development area among other parts of Indonesia. Since the North Java Coast is dominated by mild slope, soft-loose quaternary sediment and provoked by the sea thus the vulnerability of it is the most challenging issue to be assessed. Karawang is the representative area to investigate the scientific reason of coastal dynamics. This study aims to reveal the coastline changing based on RBI (1210-211, 1210-212, 1210-221, 1210-542, 1210-543, 1210-544 and 1210-631) and LPI (1210-04 and 1209-01) maps, hydrodynamics simulation and field measurements associated with abrasion and accretion. The equalizing procedure has been applied for a benchmark of zero coastlines that LPI and RBI data were used to observe the back and forth of coastline changing throughout 2000 and 2018. The results show five districts, Tirtajaya, Pakisjaya, Cilebar, Cibuaya and Pedes have the highest abrasion with an average magnitude of 11.3 m/year, 9.1 m/year, 6.9 m/year, 5.1 m/year and 3.7 m/year respectively within a total 489 ha disappear area. By all integrated analysis data so we can conclude that the dominated monsoonal longshore current is east to west and working on the dominantly terrigenous coastal alluvium and intercalated by carbonatic marine sediment.