FWENet: a deep convolutional neural network for flood water body extraction based on SAR images. Issue 1 (31st December 2022)

• Record Type: Journal Article
• Authors: Wang, Jingming; Wang, Shixin; Wang, Futao; Zhou, Yi; Wang, Zhenqing; Ji, Jianwan; Xiong, Yibing; Zhao, Qing
• Is Part Of: International journal of digital earth. Volume 15:Issue 1(2022)
• Page Start: 345
• Page End: 361
• Publication Date: 2022-12-31
• Subjects: Deep learning -- flood water body extraction -- SAR -- Poyang Lake; Geographic information systems -- Periodicals; Sustainable development -- Information technology -- Periodicals; Social planning -- Information technology -- Periodicals; 910.285
• DOI: 10.1080/17538947.2021.1995513
• Languages: English
• ISSNs: 1753-8947

Abstract

ABSTRACT: As one of the most severe natural disasters in the world, floods caused substantial economic losses and casualties every year. Timely and accurate acquisition of flood inundation extent could provide technical support for relevant departments in the field of flood emergency response and disaster relief. Given the accuracy of existing research works extracting flood inundation extent based on Synthetic Aperture Radar (SAR) images and deep learning methods is relatively low, this study utilized Sentinel-1 SAR images as the data source and proposed a novel model named flood water body extraction convolutional neural network (FWENet) for flood information extraction. Then three classical semantic segmentation models (UNet, Deeplab v3 and UNet++) and two traditional water body extraction methods (Otsu global thresholding method and Object-Oriented method) were compared with the FWENet model. Furthermore, this paper analyzed the water body area change situations of Poyang Lake. The main results of this paper were as follows: Compared with other five water body extraction methods, the FWENet model achieved the highest water body extraction accuracy, its F1 score and mean intersection over union (mIoU) were 0.9871 and 0.9808, respectively. This study could guarantee the subsequent research on flood extraction based on SAR images.