...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Land subsidence along the Ionian coast of SE Sicily (Italy), detection and analysis via Small Baseline Subset (SBAS) multitemporal differential SAR interferometry
【24h】

Land subsidence along the Ionian coast of SE Sicily (Italy), detection and analysis via Small Baseline Subset (SBAS) multitemporal differential SAR interferometry

机译：西西里岛（意大利）爱奥尼亚海沿岸的地面沉降，通过小基线子集（SBAS）多时相差分SAR干涉法进行检测和分析

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The paper presents the results of a multi-temporal, differential interferometric synthetic aperture radar (DInSAR) analysis aiming to identify active surface deformation phenomena in south-eastern Sicily. The study area has been chosen because of its strong seismicity, high concentration of industrial and agricultural activities, and high density of people living in the coastal area. Furthermore, the morphology, lithology and climatic features of this sector of the Hyblean foreland are suitable for an interferometric analysis, providing a high coherence over the area. The Small BAseline Subset (SBAS) multitemporal DInSAR technique was used to calculate mean ground velocity maps and displacement time series from a large data set of European Remote Sensing Satellites (ERS 1-2) images spanning the time period 1992-2000. The reliability of the DInSAR results was tested calculating the East _(SAR) and Up _(SAR) values over two permanent global positioning system (GPS) stations in the area, and comparing them with the East _(GPS) and Up _(GPS) values. The residuals between GPS and DInSAR velocities were 1 and 0.6mm/yr for the Up and East components, respectively. Four main subsiding areas, previously undetected, have been identified, corresponding with the towns of Augusta, Siracusa, Priolo, and Villasmundo. The observed deformation phenomena are located within coastal structural basins, filled with Pleistocene and Holocence deposits, except the Villasmundo land subsidence, which is located on the Hyblean plateau. The measured deformation rates reach values up to -18mm/yr in Augusta, -6mm/yr in Siracusa, -5mm/yr in Villasmundo and -4.5mm/yr in Priolo. The examination of velocity profiles, time series, and geological data allows us to relate all the detected deformation patterns primarily to groundwater over-exploitation. A multi-dimensional interpolation with kriging was performed to obtain a field subsidence map. A first-order elastic deformation model was used to simulate the peculiar features of the Villasmundo subsidence.
机译：本文介绍了一种多时相，差分干涉合成孔径雷达（DInSAR）分析的结果，旨在确定西西里东南部的活动表面变形现象。选择该研究区域是因为其强烈的地震作用，高度的工农业活动以及沿海地区高密度的人口。此外，Hyblean前陆这一部分的形态，岩性和气候特征适合进行干涉分析，从而在该区域提供了高度的连贯性。使用小型BAseline子集（SBAS）多时相DInSAR技术，可从1992-2000年时间段的大量欧洲遥感卫星（ERS 1-2）图像数据集中计算平均地面速度图和位移时间序列。测试了DInSAR结果的可靠性，计算了该地区两个永久性全球定位系统（GPS）站的East_（SAR）和Up_（SAR）值，并将其与East_（GPS）和Up_（ GPS）值。上和东分量的GPS和DInSAR速度之间的残差分别为1和0.6mm / yr。已经确定了四个先前未发现的主要沉降区域，分别与奥古斯塔，锡拉库扎，普里洛和维拉斯蒙多的城镇相对应。观察到的变形现象位于沿海结构盆地内，其中充满了更新世和全新世沉积物，但维拉斯蒙多的地面沉降位于海比伦高原。测得的变形率在奥古斯塔达到最高-18mm /年，在锡拉库扎达到-6mm /年，在Villasmundo达到-5mm /年，在Priolo达到-4.5mm /年。速度剖面，时间序列和地质数据的检查使我们能够将所有检测到的变形模式主要与地下水过度开采联系起来。使用克里金法进行了多维插值，以获得了地面沉降图。一阶弹性变形模型用于模拟Villasmundo沉降的特殊特征。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号