Sea level rise impact modelling on small islands: case study gili raja island of east java

Zainul Hidayah,Luhur Mukti Prayogo,Maulinna Kusumo Wardhani,Suntoyo Suntoyo,Agro Wisudawan

doi:10.1051/matecconf/201817701017

Zainul Hidayah, Luhur Mukti Prayogo + Show 3 more

Open Access

https://doi.org/10.1051/matecconf/201817701017

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Journal: MATEC Web of Conferences	Publication Date: Jan 1, 2018
Citations: 2	License type: CC BY 4.0

Affiliation: Trunojoyo University

Abstract

Coastal regions and small islands are areas that will be adversely affected by the phenomenon of sea level rise globally. In general, Sea Level Rise (SLR) will result in coastal impacts as follows: increased frequency and intensity of floods, changes in ocean currents and widespread intrusion of sea water. This research was conducted in Gili Raja Island of Sumenep Madura. Objectives of this research were to demonstrate the ability of combining remote sensing and GIS method to determine the impact of SLR on a small island and to model its scale using different scenario. GIS based run-up model were performed to estimate and predict the impact of SLR to the island’s area. Three water level scenario (0.5 m, 1.0 m and 1.5 m) were applied. The results showed that in the first scenario 8.73% of the island was flooded by sea water, furthermore in two other scenario the flooded area was increase significantly (15.88% and 22.38%).

Highlights

Sea Level Rise (SLR) is one of the important issues that must be faced by coastal or island countries in the world
This study explains the usefulness of Geographic Information System (GIS) modeling for coastal disasters prediction and management
Spatial model using GIS for small island inundation mapping is considered as an important task to support the management plan of SLR risk reduction initiatives

Summary

Introduction

Sea Level Rise (SLR) is one of the important issues that must be faced by coastal or island countries in the world. Some studies explain that at least 3 factors are considered to be the main cause of SLR. Those factors are: melting ice in both earth’s poles, extreme climatic events and land subsidence. The global rise of Sea Surface Temperature (SST) lead to melting ice in the North and South Pole of the Earth. There was an increase in sea level. It is estimated from the year 1999 - 2100 sea level could rise around 1.4 - 5.8 meters [2]. In 2100 the flooded areas were estimated to increase approximately 90,260 km2 [3]

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