基于远程传感的快速洪水绘图和损害评估在德拉伊斯梅尔汗,Khyber Pakhtunkhwa,巴基斯坦
Asif Sajjad1, Muhammad Ahmad2, Rana Waqar Aslam3
1Department of Environmental Sciences, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad, 45320, Pakistan. asifsajjad@qau.edu.pk.
Environmental monitoring and assessment
|March 21, 2025
概括
突如其来的洪水在巴基斯坦造成了巨大的破坏. 遥感和GIS分析显示,2876平方公里被淹没了1.5个月,影响农业和基础设施,强调需要更好地管理洪水风险.
科学领域:
- 环境科学 环境科学
- 遥感 遥感 遥感 遥感
- 地理信息系统 地理信息系统
背景情况:
- 突发洪水对全球构成重大风险,每年造成无数人死亡和大量经济损失.
- 巴基斯坦的德拉伊斯梅尔汗地区非常容易受到洪水的影响,正如2022年严重的洪水事件所证明的那样.
- 有效的洪水风险管理至关重要,特别是在脆弱的地区.
研究的目的:
- 分析2022年德拉伊斯梅尔汗洪水的时空动态.
- 评估洪水对土地利用和基础设施的程度和影响.
- 评估遥感和地理信息系统 (GIS) 在洪水管理中的实用性.
主要方法:
- 使用Landsat 9卫星图像进行洪水映射.
- 采用修改后的规范差水指数 (MNDWI) 来识别淹水地区.
- 适用于土地使用分析的监督最大概率分类.
主要成果:
- 洪水淹没了大约2876平方公里的土地大约1.5个月.
- 农业用地和城市基础设施受到严重破坏.
- 该研究确定了受洪水影响的关键区域.
结论:
- 使用RS和GIS进行时空分析对于德拉伊斯梅尔汗的有效洪水管理至关重要.
- 该方法可以作为全球其他脆弱地区洪水评估的模型.
- 改进的洪水风险管理策略是必要的,以减轻未来的影响.
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