FLOMPY: An Open-Source Toolbox for Floodwater Mapping Using Sentinel-1 Intensity Time Series
| Autor: | Vassilia Karathanassi, Kleanthis Karamvasis |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010504 meteorology & atmospheric sciences
Computer science open-source software Pipeline (computing) Geography Planning and Development 0211 other engineering and technologies thresholding 02 engineering and technology Aquatic Science computer.software_genre 01 natural sciences Biochemistry flooding Preprocessor Time point Baseline (configuration management) TD201-500 021101 geological & geomatics engineering 0105 earth and related environmental sciences Water Science and Technology computer.programming_language Water supply for domestic and industrial purposes time series Sentinel-1 Flood myth Hydraulic engineering Python (programming language) Thresholding Toolbox 13. Climate action Data mining TC1-978 computer |
| Zdroj: | Water Volume 13 Issue 21 Water, Vol 13, Iss 2943, p 2943 (2021) |
| ISSN: | 2073-4441 |
| DOI: | 10.3390/w13212943 |
| Popis: | A new automatic, free and open-source python toolbox for the mapping of floodwater is presented. The output of the toolbox is a binary mask of floodwater at a user-specified time point within geographical boundaries. It exploits the high spatial (10 m) and temporal (6 days per orbit over Europe) resolution of Sentinel-1 GRD intensity time series and is based on four processing steps. In the first step, a selection of Sentinel-1 images related to pre-flood (baseline) state and flood state is performed. In the second step, the preprocessing of the selected images is performed in order to create a co-registered stack with all the pre-flood and flood images. In the third step, a statistical temporal analysis is performed and a t-score map that represents the changes due to a flood event is calculated. Finally, in the fourth step, a classification procedure based on the t-score map is performed to extract the final flood map. A thorough analysis based on several flood events is presented to demonstrate the main benefits, limitations and the potential of the proposed methodology. The validation was performed using Copernicus Emergency Management Service (EMS) products. In all case studies, overall accuracies were higher than 0.95 with Kappa scores higher than 0.76. We believe that the end-user community can benefit by exploiting the flood maps of the proposed methodological pipeline by using the provided open-source toolbox. |
| Databáze: | OpenAIRE |
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