Detection of Coastline Changing by Using Remote Sensing Imagery (Case Study in Talawi District, Tanjung Tiram District, Lima Puluh Pesisir District Batu Bara Regency)

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.

Mangrove ecosystem conditions in Batu Bara district (case study in Lima Puluh Pesisir, Talawi and Tanjung Tiram sub-district)

“…One of the factors causing the decline in the area of mangrove forests in Batu Bara Regency is the high beach abrasion. This is according to the statement of [19], that from the results of data processing it was concluded that most of the coast of Batu Bara Regency had undergone changes indicating the occurrence of abrasion with the degree of abrasion being evaluated.The decline in mangroves in the Districts of Lima Puluh Pesisir, Talawi, and Tanjung Tiram is caused by the lack of knowledge and understanding of the community about the importance of mangroves for life. This study aims to determine the condition of the mangrove ecosystem in Batu Bara District in the Districts of Lima Puluh Pesisir, Talawi, and Tanjung Tiram.…”