Geoid - Journal of Geodesy and Geomatics
Vol 16, No 2 (2021)

Analisis Perubahan Morfologi Garis Pantai Akibat Tsunami di Teluk Palu Menggunakan Data Citra Sentinel-2

Nia Kurniadin (Politeknik Pertanian Negeri Samarinda)
Feri Fadlin (Politeknik Pertanian Negeri Samarinda)



Article Info

Publish Date
09 Apr 2021

Abstract

Informasi perubahan garis pantai sangat penting dalam berbagai kajian pesisir, misalnya; rencana pengelolaan kawasan pesisir, perwilayahan/zonasi bahaya, studi abrasi-akresi, serta analisis dan pemodelan morfodinamika pantai. Salah satu penyebab ternjadinya perubahan morfologi garis pantai adalah oleh fenomena tingginya gelombang akibat terjadinya tsunami. Teluk Palu mengalami terpaan gelombang Tsunami yang terjadi pada 28 September 2018. Pesisir pantai sepanjang teluk palu mengalami berubahan yang cukup signifikan akibat adanya dampak Tsunami tersebut. Dalam penelitian ini, pemanfaatan teknologi penginderaan jauh secara temporal dan spasial digunakan dalam identifikasi perubahan garis pantai. Metode yang digunakan adalah interpretasi terhadap Normalized Difference Water Index (NDWI) pada citra Sentinel-2 untuk mengidentifikasi garis pantai serta menganalisis besarnya perubahan yang terjadi. Hasil analisis perubahan garis pantai yang terjadi akibat Tsunami setelah dilakukan tumpang susun terhadap data sebelum dan setelah terjadi Tsunami diperoleh panjang garis pantai sebelum Tsunami 42,633 km dan setelah Tsunami 40,718 km dimana terjadi perubahan pajang garis pantai 1,915 km, serta luas abrasi 1,021 km2.Coastline change information is very important in various coastal studies, for example; coastal area management plans, hazard zoning, abrasion-accretion studies, as well as coastal morphodynamical analysis and modeling. One of the causes of coastline morphology change is the phenomenon of high waves due to the tsunami. Tsunami waves has exposed Palu Bay on September 28, 2018. The coast along the Palu bay experienced significant changes due to the impact of the Tsunami. In this study, temporally and spatially remote sensing technology are used to identify coastline changes. The Normalized Difference Water Index (NDWI) method used to interpret Sentinel-2 image to identify and analyze the coastline changes that happened. An analysis of the results of coastline changes that occurred as a result of the Tsunami after overlapping the data before and after the Tsunami were obtained that the length of the coastline before the Tsunami was 42.633 km and after the Tsunami was 40.718 km where there was a change in coastline length of 1.915 km, and an area 1.021 km2 of abrasion. 

Copyrights © 2021






Journal Info

Abbrev

geoid

Publisher

Subject

Earth & Planetary Sciences

Description

The journal is published biannual in February and August by the Department of Geomatics Engineering, Institut Teknologi Sepuluh Nopember (ITS). It is open access to all scientist, researchers, student and other scholars. The goal of this journal is to provide a platform for scientists and ...