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ANALISIS PERUBAHAN GARIS PANTAI DENGAN METODE DIGITAL SHORELINE ANALYSIS SYSTEM (DSAS) TAHUN 2017-2021 (STUDI KASUS: PANTAI PARANGTRITIS, KABUPATEN BANTUL): ANALYSIS OF SHORELINE CHANGES IN 2017-2021 USING THE DIGITAL SHORELINE ANALYSIS SYSTEM (DSAS) METHOD (CASE STUDY: COAST OF PARANGTRITIS, BANTUL REGENCY) Setyoningrum, Desy; Fahreza Okta Setyawan, S.Kel.,M.T; Anggita Sekar M; Faisal Akmal; M. Falbian Arsetyo N; Imam Akbar Wicaksono
JFMR (Journal of Fisheries and Marine Research) Vol. 7 No. 2 (2023): JFMR on August
Publisher : Faculty of Fisheries and Marine Science, Brawijaya University, Malang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jfmr.2023.007.02.10

Abstract

Kawasan pesisir Parangtritis adalah salah satu tujuan wisata pantai yang signifikan bagi Daerah Istimewa Yogyakarta (DIY). Aktivitas pariwisata di Parangtritis dapat dibagi menjadi dua bagian, yaito aktifitas wisatawan di wilayah pasang surut (swash zone) dan pembangunan fasilitas pendukung bagi wisatawan di wilayah darat (backshore). Perubahan garis pantai disebabkan oleh faktor-faktor seperti angin, gelombang laut, dan arus laut. Tujuan dari penelitian ini adalah untuk mengetahui perubahan garis pantai yang terjadi di wilayah Pantai Parangtritis serta hubungannya dengan pasang surut dan gelombang laut. Pemantauan perubahan garis pantai dilakukan metode Digital Shoreline Analysis System (DSAS). Metode perhitungan perubahan garis pantai yang digunakan pada DSAS yaitu metode Net Shoreline Movement (NSM), Shoreline Change Envelope (SCE) dan End Point Rate (EPR). Pengamatan perubahan garis pantai mengambil rentang waktu selama 5 tahun menggunakan data tahun 2017, 2018, 2019, 2020, dan 2021. Pada hasil penelitian ditemukan fakta bahwa terjadi abrasi dan akresi pada wilayah Pantai Parangtritis. Abrasi terjadi pada daerah yang terdampak ombak secara tinggi, tanpa adanya pemecah ombak. Akresi terjadi pada wilayah dengan kemiringan landai dengan gelombang lebih lemah. Akresi tertinggi tercatat sebesar 63.31 meter, dan abrasi tertinggi tercatat dengan angka -63,35 meter. Faktor hidrooseanografi seperti gelombang yang datang menuju pantai akan mengikis dan berpengaruh terhadap berubahnya garis pantai dan besarnya angkutan sedimen. Hal tersebut didukung dengan tinggi gelombang pada daerah tersebut adalah 2,5meter dengan rata-rata periode 10,81 detik.   The coastal area of Parangtritis is one of the significant beach tourism destinations in the Special Region of Yogyakarta (DIY). Tourism activities in Parangtritis can be divided into two parts, namely tourist activities in the swash zone and the development of supporting facilities for tourists on the backshore. Changes in the coastline are caused by factors such as wind, sea waves, and ocean currents. The purpose of this research is to understand the changes in the coastline that occur in the Parangtritis Beach area and their relationship with tides and sea waves. Monitoring of coastline changes is conducted using the Digital Shoreline Analysis System (DSAS). The methods used for calculating changes in the coastline in DSAS are Net Shoreline Movement (NSM), Shoreline Change Envelope (SCE), and End Point Rate (EPR). The observation of coastline changes spans a period of 5 years, using data from 2017, 2018, 2019, 2020, and 2021. The research findings show that there were both abrasion and accretion processes in the Parangtritis Beach area. Abrasion occurred in areas heavily impacted by high waves without the presence of wave breakers. Accretion took place in areas with gentle slopes and weaker waves. The highest accretion recorded was approximately 63.31 meters, while the highest erosion reached -63.35 meters. Hydrooceanographic factors, such as waves approaching the coast, erode the shoreline and influence the change in coastline and sediment transport. This is supported by the fact that the wave height in the area is 2.5 meters with an average period of 10.81 seconds.
SPATIO-TEMPORAL ANALYSIS OF CHANGES IN CORAL REEF AREA USING LANDSAT 8 SATELLITE IMAGERY ON PARI ISLAND, KEPULAUAN SERIBU, DKI JAKARTA Faisal Akmal; Bambang Semedi; Azura Ulfa
International Journal of Remote Sensing and Earth Sciences Vol. 21 No. 1 (2024)
Publisher : BRIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.ijreses.2024.v21.a3894

Abstract

Coral reefs are ecosystems that are sensitive to change. High pressure can cause damage to coral reefs. Monitoring the condition of coral reefs needs to be done to know the current condition. One way that can be used to monitor coral reefs is by utilizing remote sensing. The research was conducted to know the changes in the coral reef area and the factors that influence the changes in the coral reef area in Pari Island, Kepulauan Seribu, DKI Jakarta in the period 2013 to 2022. The research was conducted using Landsat 8 image data from 2013 to 2022. Image data processing was done with an object-based classification method. Coral cover measurements were conducted using the Line Intercept Transect (LIT) method. The results showed a change in coral reef area of 7.02 ha with the condition of live coral cover ranging from 27-43% which is included in the fair category. The results of field measurements show that the condition of water parameters falls into the unsuitable category. The increase in area that occurred was thought to be due to management activities carried out by the Pari Island community and activities carried out by LIPI in 2016, namely conducting coral reef restoration. The decrease in area is partly due to coastal reclamation activities, destructive tourist activities, and parameter conditions.