一种统计方法,用于整合多时间INSAR和GNSS-PPP地面变形测量
Ahmet Delen1, Fusun Balik Sanli2, Saygin Abdikan3
1Department of Geomatics Engineering, Gaziosmanpasa University, 60150 Tokat, Türkiye.
Sensors (Basel, Switzerland)
|January 11, 2024
概括
在伊斯坦布尔监测土壤变形.
科学领域:
- 地质科学 地质科学
- 地质测量是指地质测量.
- 遥感 遥感 遥感 遥感
背景情况:
- 土地变形监测对于大城市的危险管理至关重要.
- 伊斯坦布尔的金角地区由于快速发展和建设而面临重大变形.
- 之前的研究没有使用综合测量技术全面评估这些变形.
研究的目的:
- 为了调查和量化土壤变形沿伊斯坦布尔的金角海岸线.
- 为了比较交叉测量合成孔径雷达 (InSAR) 和全球导航卫星系统 (GNSS) 技术对变形监测的有效性.
- 评估城市发展对联合国教科文组织保护地区地面稳定性的影响.
主要方法:
- 利用来自Sentinel-1和ALOS-2卫星的多时间SAR图像进行InSAR分析 (2015-2020).
- 采用全球导航卫星系统 (GNSS) 与精确点定位 (PPP) 技术进行地面位移测量 (2017-2020年).
- 使用统计方法和空间分析与缓冲区进行交叉比较的INSAR和GNSS衍生的位移产品.
主要成果:
- 无论是InSAR还是GNSS技术都成功测量了垂直地面速度,表明了显著的沉降.
- 垂直移位率为InSAR的每年 -4.86至 -23.58毫米,GNSS的每年 -9.50至 -27.77毫米.
- 这项研究证实了PPP技术在精确地测测量方面的价值,并强调了PPP技术的价值.
结论:
- 集成的InSAR和GNSS提供可靠的数据,用于监测城市沿海地区的地面变形.
- 调查结果强调需要继续监测和潜在的缓解战略,以缓解黄金角的地下沉降.
- 这项研究有助于危险管理和城市规划在脆弱的大城市环境.
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