Development of coastal disaster simulation system using marine digital twin technology

Abstract

Coastal disaster simulation system (CDSS) was developed to predict coastal disasters such as typhoons, storm surges, tidal waves, floods, overtopping, beach erosion, and land subsidence using a marine data based digital twin and 3D-GIS technology. The CDSS performs scientific analyses such as typhoon path, analysis of damage to coastal facilities within the storm induced danger radius, analysis of storm surge damage areas, analysis of flood range, and analysis of land subsidence damage. Based on these simulation results, the system provides scientific evidence that can be used to take preventive measures when coastal disasters occur and minimize coastal damages. In order to predict damage to coastal infrastructures caused by typhoons, the CDSS conducts an analysis of expected damage to coastal facilities along the typhoon's path, retrieves information on the tide level at the time of arrival, and analyzes changes in arrival times due to path changes. To determine the flooding or inundation areas and depths caused by storm surges or overtopping discharges, this system utilizes the Eurotop manual (2018) to calculate wave overtopping volume, and conducts analysis based on relative elevation of coastal terrain. The analysis of coastal flooding damage areas are based on the cell automata simulation model presented in the paper (2020), development of a cell automata-based simulation model for analysis of coastal flooding due to earthquake and tsunami: a case study of Gwanganri beach, which simulates the spread of energy using the method introduced in the paper. The simulation of coastal erosion was based on the results of the research project (2018), development of coastal erosion control technology, and predicts changes over a 10- year period. In particular, the input data required for the disaster simulation was automatically extracted from 3D spatial information and applied to the 3D-GIS simulation.