DETECTING COASTLINE CHANGE IN THE SURABAYA COASTAL AREAS (INDONESIA) USING REMOTE SENSING METHOD

Coastline change in the Surabaya coastal areas (Indonesia) is caused by erosion, accretion, and anthropogenic activities, which are caused by human activities in the coastal areas. All human activities in the Surabaya coastal areas have an impact on the coastline. The purpose of this study was to detect the coastline change in the Surabaya coastal areas from 1994 to 2018. The researchers used remote sensing method to detect the coastline change. The data were obtained from the satellites of Landsat 5 (1994), Landsat 7 (2003), and Landsat OLI 8 (2018). The researchers used the Digital Shoreline Analysis System software and the statistical calculation of End Point Rate. The results showed that from 1994 to 2018 the highest of the average accretion rate in Kalisari sub-district was 75.75 m/year, and the highest of the average erosion rate in Wonorejo subdistrict was measured as of −3.4 m/year. Accretion and erosion occur due to the land use change. In Wonorejo, some mangrove areas were reduced due to illegal logging. In addition, land use change due to new ponds and residential areas occurred in East Surabaya. Meanwhile, anthropogenic activities had an impact on several areas due to Tanjung Perak and Teluk Lamong ports. To improve the environmental situation, continuous monitoring of the coastal areas of Surabaya and cooperation between the Government and the population are necessary.

coastline, remote sensing, erosion, accumulation, coastline change rate, Surabaya, Indonesia