Author:
Rumondang ,Feliatra F,Warningsih T,Yoswati D
Abstract
Abstract
The high pressure in utilizing coastal areas and oceans causes in coastal damage. The coastline is the confluence of land areas and sea areas, where the existence of the line and the position of the coastline can change and undergo changes over time, and the position of the existence of the line is not fixed. The purpose of this study is to find out the changes in the coastline of the Coal District, Talawi District, Tanjung Tiram District and Lima Puluh Pesisir District in 2017-2022. The data analysis technique was used in this study is quantitative descriptive analysis. The data processing includes: Data Acquisition using Satellite Imagery (Raster) data. The data is used by satellite imagery was selected based on 2017 until 2022 coverage representatives, the lowest percentage of cloud cover in the study area. Supporting Spatial Data (vectors). The Digital Shoreline Analysis System (DSAS) is a plug in for esri ArcGIS 10.4 - 10.6 desktops to calculate historical coastline change rate statistics. Based on the results of coastline delianiation, it can be seen that the length of coastal gasis in 2017 in The Lima Puluh Pesisir District is 10.48 Km, in 2022 there was a decrease to 10.42 Km while based on RBI data on a scale of 1:50,000 in the 2014 update year was 17.37 Km. The length of the coastline of Tanjung Tiram District in 2017 was 24.31 Km, there was a decrease in 2022 to 23.44 Km and based on RBI data of 16.90 Km.The Talawi District has the length of the coastline was 3.16 Km in 2017, there is an increase in 2022 to 3.22 Km while the coastline on the RBI map was 3.23 Kilometers in length.
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