英国柴郡地热能观测站的地面运动基线分析。

Ground motion baseline analysis of the Cheshire UK GeoEnergy Observatory.

作者信息

Novellino Alessandro, Bateson Luke, Jordan Colm

机构信息

British Geological Survey, Environmental Science Centre, Keyworth, Nottingham, NG12 5GG, UK.

Honorary Research Associate with the British Geological Survey, Environmental Science Centre, Keyworth, Nottingham, NG12 5GG, UK.

出版信息

Sci Rep. 2021 Aug 12;11(1):15684. doi: 10.1038/s41598-021-95191-4.

DOI:10.1038/s41598-021-95191-4

PMID:34385493

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8361123/

Abstract

Subsurface geonergy can induce ground motion and seismicity, however a scarcity of observations usually obscures the mechanisms underpinning such behaviour. Here, we analyse Interferometric Synthetic Aperture Radar (InSAR) data from ERS, ENVISAT and Sentinel-1 satellites for the period 1995-2017 and interpret ground deformation in the area of the planned Cheshire UK GeoEnergy Observatory ahead of facility contruction. Ground motion is dominated by the compaction of tidal flat deposits overlying two paleo-valleys, trending NNW-SSE. The western paleo-valley experienced faster subsidence rates in the period 1995-2007, whereas the eastern paleo-valley subsided faster in the period 2016-2017. The research highlights how baseline assessment can help differentiate natural variation from any anthropogenic effects associated with the growth of new subsurface technologies.

摘要

地下地热能可引发地面运动和地震活动，然而观测数据的匮乏通常会掩盖此类现象背后的机制。在此，我们分析了1995年至2017年期间来自欧洲遥感卫星（ERS）、环境卫星（ENVISAT）和哨兵-1号卫星的干涉合成孔径雷达（InSAR）数据，并在英国柴郡地质能源观测站设施建设之前，对该地区的地面变形进行了解释。地面运动主要由覆盖两条北北西-南南东走向古河谷的潮滩沉积物压实作用主导。西部古河谷在1995年至2007年期间沉降速度更快，而东部古河谷在2016年至2017年期间沉降更快。该研究凸显了基线评估如何有助于区分自然变化与新地下技术发展相关的任何人为影响。