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Analysis of land subsidence changes on the Beijing Plain from 2004 to 2015

机译：2004年至2015年北京平原土地沉降变化分析

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Land subsidence, as a surface response to the development, utilization and evolution of underground space, has become a global and multidisciplinary complex geological environment problem. Since the 1960s, land subsidence has been developing rapidly in the Beijing Plain area. Against the backdrop of the integration of Beijing, Tianjin and Hebei in addition to "southern water" (South-to-North Water Diversion Project, SNWDP) entering Beijing, the systematic study of the evolution mechanism of land subsidence is of great significance for the sustainable development of the regional economy. Firstly, this study used ENVISAT ASAR and RADARSAT-2 data to obtain surface deformation information for the Beijing Plain area from 2004 to 2015 and then verified the results. Secondly, the study area was divided into units using a 960m × 960 m grid, and the ground settlement rate of each grid unit from 2004 to 2015 was obtained. Finally, the Mann-Kendall test was performed on the grid to obtain the mutation information for each grid unit. Combined with hydrogeology and basic geological conditions, we have attempted to analyze the causes of the mutations in the grid. The results show that 2347 grid cells were mutated in a single year, with most of these distributed across the Yongding River alluvial fan and the middle and lower parts of the Chaobai River alluvial fan. A total of 1128 grid cells were mutated in multiple years, with the majority of these cells mainly distributed across the upper-middle area of the alluvial fan, near the emergency water source and at the edge of the groundwater funnel. This study aims to provide favorable technical support and a scientific basis for urban construction in Beijing.
机译：土地沉降，作为地下空间的开发，利用和演变的表面应对，已成为全球和多学科复杂地质环境问题。自20世纪60年代以来，北京平原地区的土地沉降已经迅速发展。在北京，天津和河北融合的背景下除了“南水”（南方水分流项目，SNWDP）进入北京，对土地沉降的进化机制的系统研究具有重要意义区域经济可持续发展。首先，本研究使用了Envisat Asar和Radarsat-2数据，从2004年到2015年获得北京平原地区的表面变形信息，然后验证结果。其次，将研究区域分为使用960m×960米网格的单元，并获得了2004年至2015年的每个网格单元的地面沉降率。最后，在网格上执行MANN-KENDALL测试，以获得每个网格单元的突变信息。结合水文地质和基本地质条件，我们试图分析网格中突变的原因。结果表明，2347个网格细胞在一年中突变，大部分这些都分布在永定河冲积风扇和樟草河冲积扇的中下部。多年来，总共1128个网格细胞突变，大多数这些细胞主要分布在冲积风扇的上部区域，靠近应急水源和地下水漏斗的边缘。本研究旨在为北京提供有利的技术支持和科学基础。

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