ASSESSMENT OF COASTAL VULNERABILITY INDEX (CVI) AND ITS APPLICATION ALONG THE SRAGI COAST, SOUTH LAMPUNG, INDONESIA

Abstract

One of the simplest and most widely used methods for evaluating coastal susceptibility to geomorphological and physical parameters is the Coastal susceptibility Index (CVI). This approach can thus be utilized as a resource for the local government to evaluate to measure vulnerability and determine the degree of risk that a coast faces. To execute successful risk reduction measures, this measurement is a fundamental first step. Thus, the purpose of this study is to evaluate the vulnerability of the coastal areas in Sragi, South Lampung, Indonesia, using the Coastal Vulnerability Index (CVI) approach, which calculates physical and geomorphological parameters. The six factors that make up the assessment of coastal vulnerability are as follows: tidal range, significant wave height, coastal elevation, sea-level change rate, shoreline change rate, and geomorphology. The 6 km long Sragi coastal areas are split into 12 sections. With a covering area of 500 meters, each segment accurately reflects the size of the region under assessment. The result shows that the total of 83.33% of the Sragi coastal area is classified as having a very high vulnerability index, influenced by the values of shoreline change predominantly experiencing a change of < -2.0 m/year along a 5 km stretch of the coastline and the number of coastal slopes. This condition indicates that along the 5 km coastline of Sragi, there is a more predominant occurrence of erosion or shoreline retreat.