Monitoring the Response of Roads and Railways to Seasonal Soil Movement with Persistent Scatterers Interferometry over Six UK Sites
Monitoring the Response of Roads and Railways to Seasonal Soil Movement with Persistent Scatterers Interferometry over Six UK Sites
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DOI：
10.3390/rs9090922
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发表时间：
2017-09
期刊：
影响因子：
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通讯作者：
Matthew R. North;T. Farewell;S. Hallett;Audrey Bertelle
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文献类型：
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作者：
Matthew R. North;T. Farewell;S. Hallett;Audrey Bertelle
公路和铁路网络为社会提供了重要的支持，但它们可能因季节性土壤移动而退化。目前，很少有运输网络运营商监测小规模的土壤移动，但了解导致基础设施故障的条件可以提高网络的弹性。持续散射体干涉测量法（PSI）是一种遥感技术，可用于大面积近实时地面运动监测。本研究测试使用PSI的监测响应的主要道路，次要道路和铁路地面运动在英格兰的六个研究地点，使用哨兵1号数据VV极化在上升轨道。有些土壤比其他土壤更稳定，国家土壤图被用来量化基础设施运动和主要土壤群体之间的关系。交通基础设施的垂直移动是工程设计、土壤特性和交通负荷的函数。修建在易受季节性水涝影响的土壤（地下水潜育土、地表水潜育土、白浆土和棕壤）上的公路和铁路表现出季节性沉降和隆起，与基础设施退化的风险增加有关。公路和铁路在灰化土表现出相对稳定。泥炭土上的铁路表现出最极端的持续沉降，达7.5 mm/a。本研究的局限性包括观测期短（约13个月，由于卫星数据的可用性）和区域尺度的土壤图制图单元包含多种土壤类型，具有不同的地面运动潜力。今后在较长时期内使用更高分辨率的土壤图将推动这项研究。然而，这项研究表明，PSI的可行性作为一种技术来测量季节性土壤相关的地面运动和相关的影响，道路和铁路基础设施。
Road and rail networks provide critical support for society, yet they can be degraded by seasonal soil movements. Currently, few transport network operators monitor small-scale soil movement, but understanding the conditions contributing to infrastructure failure can improve network resilience. Persistent Scatterers Interferometry (PSI) is a remote sensing technique offering the potential for near real-time ground movement monitoring over wide areas. This study tests the use of PSI for monitoring the response of major roads, minor roads, and railways to ground movement across six study sites in England, using Sentinel 1 data in VV polarisation in ascending orbit. Some soils are more stable than others—a national soil map was used to quantify the relationships between infrastructure movement and major soil groups. Vertical movement of transport infrastructure is a function of engineering design, soil properties, and traffic loading. Roads and railways built on soil groups prone to seasonal water-logging (Ground-water Gley soils, Surface-water Gley soils, Pelosols, and Brown soils) demonstrated seasonal subsidence and heave, associated with an increased risk of infrastructure degradation. Roads and railways over Podzolic soils demonstrated relative stability. Railways on Peat soils exhibited the most extreme continual subsidence of up to 7.5 mm year−1. Limitations of this study include the short observation period (~13 months, due to satellite data availability) and the regional scale of the soil map—mapping units contain multiple soil types with different ground movement potentials. Future use of a higher resolution soil map over a longer period will advance this research. Nevertheless, this study demonstrates the viability of PSI as a technique for measuring both seasonal soil-related ground movement and the associated impacts on road and rail infrastructure.