分析Joshimath的沉没:原因,后果和远程传感技术的未来前景
Shubham Awasthi1, Kamal Jain2,3, Sashikanta Sahoo2
1Centre of Excellence in Disaster Mitigation and Management, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India. sawasthi@dm.iitr.ac.in.
Scientific reports
|May 13, 2024
概括
乔希马斯的土地变形在2022-2023年显著增加,在西北地区沉降最大. 失控的人类活动和不良排水被确定为主要原因.
科学领域:
- 地质科学和遥感技术
- 自然危险监测 监测自然危险
- 地球表面动力学 地球表面动力学
背景情况:
- 喜马拉雅山脉容易发生自然灾害,包括土地变形,地震和山体滑坡等.
- 乔希马特镇最近经历了严重的土地沉降,对基础设施造成广泛破坏,并对居民构成风险.
研究的目的:
- 用先进的遥感技术监测和分析Joshimath地区的土地变形.
- 确定导致观察到的土地沉降的主要致病因素.
- 为脆弱的喜马拉雅地区的未来发展政策提供建议.
主要方法:
- 利用持久散射器合成孔径雷达干扰测量 (PSInSAR) 与多时间的哨兵-1数据集来计算土地变形速度 (2022-2023).
- 通过使用高分辨率行星数据集进行特征跟踪和土地移位分析.
- 使用无人机 (UAV) 数据集评估关键区域的地面条件.
主要成果:
- 在Joshimath (2022-2023) 的土地变形速度从-89.326到+94.46毫米/年不等,在西北部分观察到的最高速度.
- 最大的土地沉降发生在Singhdwar周围 (+60.45到+94.46毫米/年),而其他地区显示中等至高沉降或局部扩张.
- 与之前的时期 (2016-2017,2018-2019,2020-2021) 相比,2022-2023年土地变形明显增加.
结论:
- 乔希马斯的土地变形主要是由不受控制的人为活动,基础设施发展和不充分的排水系统推动的.
- 调查结果强调,迫切需要修订发展政策,以减轻易受影响的喜马拉雅地区的风险.
- 综合遥感和无人机评估对于理解和管理土地变形危险至关重要.
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