Analysis Of Shoreline Changes In Maintaining The Sustainability Of Coastal Areas At Padang Pariaman Regency, Indonesia

Abstract

Shoreline changes on the coast of Padang Pariaman Regency are influenced by hydro-oseanographic and anthropogenic factors. Each nagari has different dominant factors. This reseach aim to  1. Analyze the contributing factors to changes in Pernagari's coastline. 2. Analyzing changes in Pernagari land cover in coastal areas. 3. Analyzing existing coastal protection buildings in each Nagari. 4. Analyze sedimentation contributions from the Limau and Batang Anai Rivers. This research uses panel data regression method to determine the factors that influence shoreline changes, Digital Shoreline Analysis System (DSAS) to determine shoreline changes, SAS Planet image analysis to calculate coastal protection structures and Jaelani algorithm to analyze sediment concentration.The study reveals that vegetation loss in Kenagarian Katapiang, Pilubang, Ulakan, and Tapakis significantly threatens coastal stability. Ineffective coastal protection exacerbates abrasion in these areas. Additionally, climate change also increases the risk of threats to coastal areas. Land use changes in the watershed transport sediment to the estuary, which causes coastal accretion and increases the land area around Gisik Shoal. Overall, the coastline at the mouth of the Limau Watershed experienced more dominant accretion than abrasion due to the high sedimentation process that occurred in 2003-2018. While the dominant shoreline changes that occur in the Batang Anai watershed are (abrasion). Each nagari has a different dominant shoreline change factor. therefore the solution in each region as well. Stakeholders need to understand this condition in order to be able to manage coastal areas more effectively.