Study of coastal abrasion disasters and their causes in Pariaman City

Abstract

Abstract In 2003 until 2016 on the coast of West Sumatra Province there have been disasters of abrasion and accretion in 32 points in 6 Regencies and Cities covering an area of 732.69 Ha of abrasion and accretion of 55.4 Ha. Pariaman City is one of the coastal cities in West Sumatra Province. The purpose of this study is to examine the characteristics of coastal abrasion in the last 15 years (2003 to 2018) in Pariaman City and its causal factors. The analytical method used is the 2003 coastline comparison method with the coastline in 2018. Congratulations on 15 years of observation, there was coastal abrasion in the coastal area of Pariaman City covering an area of 197.65 ha and accretion of 285.38 ha. This proves that coastal abrasion causes a substantial reduction in land in Pariaman City, which is an average of 13.18 ha / year, while land addition is 19.03 ha / year. Physical factors that most influence the abrasion and accretion of coastal Pariaman City are current factors, shoreline shape, coastal typology and vegetation cover while low wave factors are quite influential.