ASSESSMENT AND MITIGATION OF MONSOON FLOODS VIA SATELLITE IMAGERY DATA EXTRACTION AND DRONE FULL MOTION VIDEO (FMV)

Abstract

According to the Disaster Year in Review 2019 by the Centre for Research on the Epidemiology of Disasters (CRED), there were 194 reported occurrences on floods that had affected nearly 31 million people, which caused approximately 5,000 deaths in 2019. In Malaysia, monsoon floods are the most devastating natural disaster that occurs between November to March for the Northeast Monsoon and May to September for the Southwest Monsoon. Malaysia experiences serious flooding, which has a negative impact on several states especially on the economy and to society in general. Floods are natural incidents that cannot be avoided but its impact can be minimised by implementing flood mitigation plans. Actual flood extent and distribution of affected areas are difficult to be estimated and determined using conventional flood monitoring methods such as using manned aircrafts, which is not cost effective and too risky. However, this can be solved using remote sensing technology. By obtaining information through satellite images and drone full motion video (FMV), the cause of the aggravated flood situation can be identified. Through the application of radar satellite imagery and land use information, we are able to extract water bodies and identify the actual flood extent. The generated flood extent information is then overlaid on optical satellite images to identify hotspot areas such as the possible causes of flood situations. In order to acquire more details / real time information on the flood hotspot areas, a quadrotor drone with FMV sensor is used. The captured FMV data is analysed using TacitView for real time and post-event analysis. The combination of remote sensing satellite imagery and drone FMV data through geographical information systems (GIS) analysis can produce critical and useful information for authorities to draw up more effective and efficient flood mitigation plans.
Keywords: Flood assessment and mitigation; drone full Motion Video (FMV); remote sensing , satellite imagery; hotspot locations; real-time field assessment.

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