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模拟西班牙洛尔卡的二维和三维位移场、沉降以及全球影响。

Modeling the two- and three-dimensional displacement field in Lorca, Spain, subsidence and the global implications.

机构信息

Instituto de Geociencias (CSIC, UCM), Calle del Doctor Severo Ochoa, no 7, Facultad de Medicina (Edificio Entrepabellones 7 y 8, 4a planta), Ciudad Universitaria, 28040, Madrid, Spain.

ETSI Topografía, Geodesia y Cartografía, Universidad Politécnica de Madrid, Ctra. Valencia km 7, 28031, Madrid, Spain.

出版信息

Sci Rep. 2018 Oct 3;8(1):14782. doi: 10.1038/s41598-018-33128-0.

DOI:10.1038/s41598-018-33128-0
PMID:30283152
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6170491/
Abstract

Land subsidence associated with overexploitation of aquifers is a hazard that commonly affects large areas worldwide. The Lorca area, located in southeast Spain, has undergone one of the highest subsidence rates in Europe as a direct consequence of long-term aquifer exploitation. Previous studies carried out on the region assumed that the ground deformation retrieved from satellite radar interferometry corresponds only to vertical displacement. Here we report, for the first time, the two- and three-dimensional displacement field over the study area using synthetic aperture radar (SAR) data from Sentinel-1A images and Global Navigation Satellite System (GNSS) observations. By modeling this displacement, we provide new insights on the spatial and temporal evolution of the subsidence processes and on the main governing mechanisms. Additionally, we also demonstrate the importance of knowing both the vertical and horizontal components of the displacement to properly characterize similar hazards. Based on these results, we propose some general guidelines for the sustainable management and monitoring of land subsidence related to anthropogenic activities.

摘要

与含水层过度开采有关的地面沉降是一种常见的危害，它普遍影响着全球的大片地区。位于西班牙东南部的洛尔卡地区由于长期开采含水层，经历了欧洲最高的沉降率之一。以前对该地区进行的研究假设，从卫星雷达干涉测量中获取的地面变形仅对应于垂直位移。在这里，我们首次使用 Sentinel-1A 图像的合成孔径雷达 (SAR) 数据和全球导航卫星系统 (GNSS) 观测报告了研究区域的二维和三维位移场。通过对这种位移进行建模，我们对沉降过程的时空演化以及主要控制机制有了新的认识。此外，我们还证明了了解位移的垂直和水平分量对于正确描述类似灾害的重要性。基于这些结果，我们为与人为活动相关的地面沉降的可持续管理和监测提出了一些一般性指导原则。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa70/6170491/bf24b77ef201/41598_2018_33128_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa70/6170491/6fc07937d3c3/41598_2018_33128_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa70/6170491/90f8e1cc420c/41598_2018_33128_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa70/6170491/9ebf75003791/41598_2018_33128_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa70/6170491/fb82f5d90a51/41598_2018_33128_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa70/6170491/6ba108e65178/41598_2018_33128_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa70/6170491/bf24b77ef201/41598_2018_33128_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa70/6170491/6fc07937d3c3/41598_2018_33128_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa70/6170491/90f8e1cc420c/41598_2018_33128_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa70/6170491/9ebf75003791/41598_2018_33128_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa70/6170491/fb82f5d90a51/41598_2018_33128_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa70/6170491/6ba108e65178/41598_2018_33128_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa70/6170491/bf24b77ef201/41598_2018_33128_Fig6_HTML.jpg

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