University of Bucharest, Faculty of Geography, Department of Geomorphology-Pedology-Geomatics, Nicolae Balcescu 1, Sector 1, 010041, Bucharest, Romania.
ISCTE-IUL and BRU-IUL, Department of Quantitative Methods for Management and Economics, Avenida Das Forças Armadas, 1600-083, Lisbon, Portugal.
Sci Rep. 2017 Mar 2;7:43762. doi: 10.1038/srep43762.
The aim of this exploratory research is to capture spatial evolution patterns in the Bucharest metropolitan area using sets of single polarised synthetic aperture radar (SAR) satellite data and multi-temporal radar interferometry. Three sets of SAR data acquired during the years 1992-2010 from ERS-1/-2 and ENVISAT, and 2011-2014 from TerraSAR-X satellites were used in conjunction with the Small Baseline Subset (SBAS) and persistent scatterers (PS) high-resolution multi-temporal interferometry (InSAR) techniques to provide maps of line-of-sight displacements. The satellite-based remote sensing results were combined with results derived from classical methodologies (i.e., diachronic cartography) and field research to study possible trends in developments over former clay pits, landfill excavation sites, and industrial parks. The ground displacement trend patterns were analysed using several linear and nonlinear models, and techniques. Trends based on the estimated ground displacement are characterised by long-term memory, indicated by low noise Hurst exponents, which in the long-term form interesting attractors. We hypothesize these attractors to be tectonic stress fields generated by transpressional movements.
本探索性研究的目的是利用多组单极化合成孔径雷达（SAR）卫星数据和多时相雷达干涉测量技术来捕捉布加勒斯特大都市区的空间演变模式。在本研究中，我们使用了 1992 年至 2010 年期间从 ERS-1/-2 和 ENVISAT 卫星获取的三组 SAR 数据，以及 2011 年至 2014 年期间从 TerraSAR-X 卫星获取的三组 SAR 数据，结合小基线集（SBAS）和持久散射体（PS）高分辨率多时相干涉测量（InSAR）技术，提供视线路径位移图。基于卫星的遥感结果与经典方法（即历时性制图）和实地研究相结合，研究了前粘土坑、垃圾填埋场挖掘区和工业园区的可能发展趋势。使用了几种线性和非线性模型和技术来分析地面位移趋势模式。基于估计的地面位移的趋势具有长期记忆特征，这表现为低噪声赫斯特指数，在长期中形成了有趣的吸引子。我们假设这些吸引子是由压扭运动产生的构造应力场。
