Mapping of Flood Areas Using Landsat with Google Earth Engine Cloud Platform
Mehmood, Hamid, Conway, Crystal and Perera, Duminda, (2021). Mapping of Flood Areas Using Landsat with Google Earth Engine Cloud Platform. Atmosphere, 12(7), 1-16
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Article
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Sub-type Journal article Author Mehmood, Hamid
Conway, Crystal
Perera, DumindaTitle Mapping of Flood Areas Using Landsat with Google Earth Engine Cloud Platform Appearing in Atmosphere Volume 12 Issue No. 7 Publication Date 2021-07-03 Place of Publication Basel Publisher MDPI Start page 1 End page 16 Language eng Abstract The Earth Observation (EO) domain can provide valuable information products that can significantly reduce the cost of mapping flood extent and improve the accuracy of mapping and monitoring systems. In this study, Landsat 5, 7, and 8 were utilized to map flood inundation areas. Google Earth Engine (GEE) was used to implement Flood Mapping Algorithm (FMA) and process the Landsat data. FMA relies on developing a “data cube”, which is spatially overlapped pixels of Landsat 5, 7, and 8 imagery captured over a period of time. This data cube is used to identify temporary and permanent water bodies using the Modified Normalized Difference Water Index (MNDWI) and site-specific elevation and land use data. The results were assessed by calculating a confusion matrix for nine flood events spread over the globe. The FMA had a high true positive accuracy ranging from 71–90% and overall accuracy in the range of 74–89%. In short, observations from FMA in GEE can be used as a rapid and robust hindsight tool for mapping flood inundation areas, training AI models, and enhancing existing efforts towards flood mitigation, monitoring, and management. Copyright Holder The Authors Copyright Year 2021 Copyright type Creative commons DOI 10.3390/atmos12070866 -
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