长沙理工大学学报（自然科学版）2024，Vol.21Issue(6)：1-13,13.DOI:10.19951/j.cnki.1672-9331.20240502001
基于Sentinel-1A SAR影像的珠海市台风降雨淹没特征分析
Inundation characteristics of typhoon-induced rainfall in Zhuhai based on Sentinel-1A SAR images
摘要
Abstract
[Purposes]Based on radar remote sensing satellite images,this paper aims to explore the inundation characteristics of typhoon-induced rainfall in urban areas of Zhuhai City,so as to solve the problem of not being able to accurately obtain the inundation scope during the passage of a typhoon.[Methods]Firstly,Sentinel-1A synthetic aperture radar(SAR)images and an annual dataset of global surface water were selected to obtain the inundation scope in the main urban area of Zhuhai City in the corresponding time period by using the threshold segmentation method and the dual-polarized water index.Then,combined with the digital elevation model and the land-use type data,the spatial characteristics and causes of inundation scopes caused by rainfalls during the passage of 10 typhoons from 2015 to 2022 were analyzed by using the ArcGIS platform.Through the hierarchical analysis method,the inundation risk in the main urban area of Zhuhai City caused by typhoon-induced rainfalls was analyzed in terms of inundation possibility,tidal flood control capacity,elevation,and river network density.[Findings]In the inundation scopes generated by typhoon-induced and non-typhoon-induced rainfalls,Doumen District is the administrative district with the largest inundation area,and inundation is the most frequent in the areas with denser river networks in Zhuhai City,followed by urban and rural residential land use;some areas in Zhuhai City are susceptible to inundation due to the impacts of typhoon-induced rainfall,and the inundation risk is high.[Conclusions]Using Sentinel-1A SAR images combined with a dual-polarized water index can obtain more accurate information on the inundation scope of typhoon-induced rainfall.During the passage of typhoons,more attention should be paid to the disaster situation in areas with low elevation and areas with dense water system distribution.关键词
淹没范围/台风降雨/空间特征/Sentinel-1A/淹没风险/双极化水体指数Key words
inundation scope/typhoon-induced rainfall/spatial characteristic/Sentinel-1A/inundation risk/dual-polarized water index分类
信息技术与安全科学引用本文复制引用
陈杰,谭璐,蒋昌波,伍志元..基于Sentinel-1A SAR影像的珠海市台风降雨淹没特征分析[J].长沙理工大学学报（自然科学版）,2024,21(6):1-13,13.基金项目
湖南省自然科学杰出青年基金(2022JJ10047) （2022JJ10047）
国家自然科学基金资助项目(52271257) Project(2022JJ10047)supported by Outstanding Youth Natural Science Foundation of Hunan Province （52271257）
Project(52271257)supported by the National Natural Science Foundation of China （52271257）
