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基于AHP和EWM的上海市土地沉降风险评估
Yinshui Zhan1, Yichen Zhang2, Jiquan Zhang3
1College of Jilin Emergency Management, Changchun Institute of Technology, Changchun, 130021, China.
Scientific reports
|March 2, 2025
概括
上海 上海 上海 上海 上海
科学领域:
- 地质科学和环境科学 地球科学和环境科学
- 城市规划和风险评估
背景情况:
- 城市土地沉降 (LS) 在快速扩张的城市如上海越来越令人担忧,威胁着基础设施和环境安全.
- 土地沉降的延迟需要先进的监测和风险评估技术.
研究的目的:
- 制定一个全面的风险评估框架,对城市土地沉降在上海.
- 综合地质,水文和人为因素,使用多标准决策分析方法.
主要方法:
- 使用了远程传感 (RS),谷歌地球引擎 (GEE) 和小基线子集交叉测量合成孔径雷达 (SBAS-InSAR).
- 开发了15个指标的评估系统,并应用了分析层次过程 (AHP) 和重法 (EWM) 来进行综合权衡.
- 使用自然灾害风险理论和ArcGIS进行空间风险评估和可视化.
主要成果:
- 将上海分为五个风险类别:非常低 (67.00%),低 (17.87%),中等 (9.25%),高 (3.39%) 和非常高 (2.48%).
- 与历史沉降数据和LS预防地图对比的验证结果,证实了方法的有效性.
- 确定了集中在中心,人口密集和经济发达城市地区的高风险区域.
结论:
- 上海的整体土地沉降风险相对较低.
- 综合的RS,GEE和SBAS-InSAR方法为城市土地沉降风险评估提供了一个强大的框架.
- 需要针对城市中心地区的高风险地区制定有针对性的风险管理策略.
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