Assessments of land subsidence along the Rizhao–Lankao high-speed railway at Heze, China, between 2015 and 2019 with Sentinel-1 data

<p>The Heze section of Rizhao–Lankao high-speed railway (RLHR-HZ) has been under construction since 2018 and will be in operation by the end of 2021. However, there is a concern that land subsidence in the Heze region may affect the regular operation of RLHR-HZ. In this study, we investigate t...

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Main Authors: C. Zhu, W. Wu, M. Motagh, L. Zhang, Z. Jiang, S. Long
Format: Article
Language:English
Published: Copernicus Publications 2020-12-01
Series:Natural Hazards and Earth System Sciences
Online Access:https://nhess.copernicus.org/articles/20/3399/2020/nhess-20-3399-2020.pdf
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spelling doaj-319d8661d7724adc97afa0ab816a356d2020-12-14T06:40:27ZengCopernicus PublicationsNatural Hazards and Earth System Sciences1561-86331684-99812020-12-01203399341110.5194/nhess-20-3399-2020Assessments of land subsidence along the Rizhao–Lankao high-speed railway at Heze, China, between 2015 and 2019 with Sentinel-1 dataC. Zhu0W. Wu1M. Motagh2M. Motagh3L. Zhang4Z. Jiang5S. Long6Key Laboratory of Coal Resources Clean-utilization & Mine Environment Protection of Hunan Province, Hunan university of Science & Technology, Xiangtan 411201, ChinaKey Laboratory of Coal Resources Clean-utilization & Mine Environment Protection of Hunan Province, Hunan university of Science & Technology, Xiangtan 411201, ChinaSection of Remote Sensing and Geoinformatics at GFZ German Research Centre for Geosciences, Potsdam, GermanyInstitute of Photogrammetry and Geoinformation at Leibniz University Hannover (LUH), Hannover, GermanyKey Laboratory of Coal Resources Clean-utilization & Mine Environment Protection of Hunan Province, Hunan university of Science & Technology, Xiangtan 411201, ChinaKey Laboratory of Coal Resources Clean-utilization & Mine Environment Protection of Hunan Province, Hunan university of Science & Technology, Xiangtan 411201, ChinaKey Laboratory of Coal Resources Clean-utilization & Mine Environment Protection of Hunan Province, Hunan university of Science & Technology, Xiangtan 411201, China<p>The Heze section of Rizhao–Lankao high-speed railway (RLHR-HZ) has been under construction since 2018 and will be in operation by the end of 2021. However, there is a concern that land subsidence in the Heze region may affect the regular operation of RLHR-HZ. In this study, we investigate the contemporary ground deformation in the region between 2015 and 2019 by using more than 350 C-band interferograms constructed from two tracks of Sentinel-1 data over the region. The small baseline subset (SBAS) technique is adopted to compile the time-series displacement. We find that the RLHR-HZ runs through two main subsidence areas: one is located east of the Heze region with rates ranging from <span class="inline-formula">−4</span> to <span class="inline-formula">−1</span> <span class="inline-formula">cm yr<sup>−1</sup></span>, and another one is located in the coalfield with rates ranging from <span class="inline-formula">−8</span> to <span class="inline-formula">−2</span> <span class="inline-formula">cm yr<sup>−1</sup></span>. A total length of 35 <span class="inline-formula">km</span> of RLHR-HZ is affected by the two subsidence basins. Considering the previous investigation and the monthly precipitation, we infer that the subsidence bowl east of the Heze region is due to massive extraction of deep groundwater. Close inspections of the relative locations between the second subsidence area and the underground mining reveals that the subsidence there is probably caused by the groundwater outflow and fault instability due to mining, rather than being directly caused by mining. The InSAR-derived ground subsidence implies that it is necessary to continue monitoring the ground deformation along RLHR-HZ.</p>https://nhess.copernicus.org/articles/20/3399/2020/nhess-20-3399-2020.pdf
collection DOAJ
language English
format Article
sources DOAJ
author C. Zhu
W. Wu
M. Motagh
M. Motagh
L. Zhang
Z. Jiang
S. Long
spellingShingle C. Zhu
W. Wu
M. Motagh
M. Motagh
L. Zhang
Z. Jiang
S. Long
Assessments of land subsidence along the Rizhao–Lankao high-speed railway at Heze, China, between 2015 and 2019 with Sentinel-1 data
Natural Hazards and Earth System Sciences
author_facet C. Zhu
W. Wu
M. Motagh
M. Motagh
L. Zhang
Z. Jiang
S. Long
author_sort C. Zhu
title Assessments of land subsidence along the Rizhao–Lankao high-speed railway at Heze, China, between 2015 and 2019 with Sentinel-1 data
title_short Assessments of land subsidence along the Rizhao–Lankao high-speed railway at Heze, China, between 2015 and 2019 with Sentinel-1 data
title_full Assessments of land subsidence along the Rizhao–Lankao high-speed railway at Heze, China, between 2015 and 2019 with Sentinel-1 data
title_fullStr Assessments of land subsidence along the Rizhao–Lankao high-speed railway at Heze, China, between 2015 and 2019 with Sentinel-1 data
title_full_unstemmed Assessments of land subsidence along the Rizhao–Lankao high-speed railway at Heze, China, between 2015 and 2019 with Sentinel-1 data
title_sort assessments of land subsidence along the rizhao–lankao high-speed railway at heze, china, between 2015 and 2019 with sentinel-1 data
publisher Copernicus Publications
series Natural Hazards and Earth System Sciences
issn 1561-8633
1684-9981
publishDate 2020-12-01
description <p>The Heze section of Rizhao–Lankao high-speed railway (RLHR-HZ) has been under construction since 2018 and will be in operation by the end of 2021. However, there is a concern that land subsidence in the Heze region may affect the regular operation of RLHR-HZ. In this study, we investigate the contemporary ground deformation in the region between 2015 and 2019 by using more than 350 C-band interferograms constructed from two tracks of Sentinel-1 data over the region. The small baseline subset (SBAS) technique is adopted to compile the time-series displacement. We find that the RLHR-HZ runs through two main subsidence areas: one is located east of the Heze region with rates ranging from <span class="inline-formula">−4</span> to <span class="inline-formula">−1</span> <span class="inline-formula">cm yr<sup>−1</sup></span>, and another one is located in the coalfield with rates ranging from <span class="inline-formula">−8</span> to <span class="inline-formula">−2</span> <span class="inline-formula">cm yr<sup>−1</sup></span>. A total length of 35 <span class="inline-formula">km</span> of RLHR-HZ is affected by the two subsidence basins. Considering the previous investigation and the monthly precipitation, we infer that the subsidence bowl east of the Heze region is due to massive extraction of deep groundwater. Close inspections of the relative locations between the second subsidence area and the underground mining reveals that the subsidence there is probably caused by the groundwater outflow and fault instability due to mining, rather than being directly caused by mining. The InSAR-derived ground subsidence implies that it is necessary to continue monitoring the ground deformation along RLHR-HZ.</p>
url https://nhess.copernicus.org/articles/20/3399/2020/nhess-20-3399-2020.pdf
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