北京市"23·7"特大暴雨洪涝淹没范围识别分析
Identification and analysis of inundation area during"23·7"heavy rainstorm in Beijing
王越 1张可 2李兆永 3童意 4邸苏闯 2郑凡东 2李巧玲1
作者信息
- 1. 河海大学 江苏南京 210098
- 2. 北京市水科学技术研究院 北京 100048;北京市非常规水资源开发利用与节水工程技术研究中心 北京 100048
- 3. 菏泽市引黄灌溉工程管理服务中心 山东菏泽 274000
- 4. 北京市工程咨询有限公司 北京 100124
- 折叠
摘要
为掌握"23·7"特大暴雨后北京市受灾情况,利用高分三号(GF-3)和资源一号(ZY-1)卫星数据,通过双极化水体指数SDWI提取北京市总体洪水淹没范围,采用专题信息判读法对北京市重点行政区淹没范围进行精准识别,并结合全市内涝舆情数据对淹没范围提取结果进行验证.结果表明:提取的灾后洪涝淹没范围与积水内涝诉求点位分布一致,其中房山区诉求次数最多、最密集;暴雨导致北京市地表水体面积约增加382.75 km2,增幅约为113.2％,其中西部昌平、门头沟、房山三区受灾最严重.利用SAR和可见光影像的互补性,能够为洪涝灾前防御和灾后分析提供技术保障,满足汛期应急监测需求.
Abstract
In order to grasp the disaster situation in Beijing induced by the severe"23·7"heavy rain-storm,(GF-3)and(ZY-1)satellite data were used to extract the overall inundation extent of Beijing us-ing the dual-polarised water body index(SDWI).The inundation extent of Beijing's key administrative districts was accurately identified by the thematic information interpretation method,and verified by com-bining with the city's public opinion data on waterlogging.The precise identification of submerged areas in key administrative districts of Beijing was achieved through the application of a thematic information interpretation method.This approach was further validated by integrating public sentiment data on urban waterlogging throughout the entire city.The results showed that:the extracted post-disaster inundation ex-tent of flooding was consistent with the distribution of waterlogging claims,with the Fangshan District be-ing the most frequent and densely populated;the rainstorm resulted in an increase of 382.75 km2(113.2％)in the surface water area of Beijing,among which Changping,Mentougou and Fangshan districts in the southwest were the most severely affected;the use of SAR and the complementary nature of visible imagery could provide technical support for the pre-disaster flood defence and post-disaster analysis,and satisfy the emergency monitoring and monitoring requirements during the flood season.
关键词
SAR/暴雨/淹没范围/SDWIKey words
SAR/heavy rain/inundation range/SDWI引用本文复制引用
基金项目
北京市科委重大研发项目(Z231100003823005)
高分辨率对地观测系统国家科技重大专项(65-Y50G01-9001-22/23)
水利部青年拔尖人才资助项目()
出版年
2024
国家科技期刊平台
NSTL
万方数据