Journal of Geo-information Science >
The Influence of Building Load to Land Subsidence in Beijing Plain based on PS-InSAR and GIS
Received date: 2016-06-14
Request revised date: 2016-08-31
Online published: 2016-11-20
Copyright
Land subsidence in Beijing plain is becoming increasingly acute. The causes of land subsidence are complicated, including artificial over-exploration of groundwater and building load as well as natural soil consolidation and the influence of active structure. Over-exploration of groundwater and building load are the two important driving factors in the land subsidence of Beijing Plain. What we have focused on is how regional scale building load should be extracted and evaluated. In this paper, the simplified plot ratio stands for the building load and the land subsidence information of the study area is measured by PS-InSAR technique. We get the uneven subsidence distribution under the same groundwater exploration by the way of GIS spatial analysis. Meanwhile, building height is extracted by the way of Shadow's Length Method with high-resolution optical images. At last, the relationship between building load and land subsidence is studied by spatial analysis and regression analysis. The main conclusions obtained are as follows: (1) Land subsidence in Beijing is very serious during 2003-2010, the percentage of 30mm/a-41.89mm/a area is 21.08%. (2) The uneven subsidence distribution under the same groundwater exploration is located in the central and northern Beijing as an H shape. (3) Shadow's Length Method can accurately estimate the plot ratio, which can be used to extract regional scale building load. (4) Land subsidence rate has a correlation with building plot ratio in similar geological condition and ground water level changing area but the correlation coefficient is small.
Key words: land subsidence; PS-InSAR; building load; plot ratio; GIS
ZHOU Chaodong , GONG Huili , ZHANG Youquan , DUAN Guangyao . The Influence of Building Load to Land Subsidence in Beijing Plain based on PS-InSAR and GIS[J]. Journal of Geo-information Science, 2016 , 18(11) : 1551 -1562 . DOI: 10.3724/SP.J.1047.2016.01551
Fig. 1 Location of study area图1 研究位置 |
Tab. 1 Main data types and sources表1 研究区主要数据类型及来源 |
序号 | 轨道号 | 影像时间 | 序号 | 轨道号 | 影像时间 | 序号 | 轨道号 | 影像时间 |
---|---|---|---|---|---|---|---|---|
1 | 09290 | 2003-12-10 | 17 | 25322 | 2007-01-03 | 33 | 34340 | 2008-09-24 |
2 | 09791 | 2004-01-14 | 18 | 25823 | 2007-02-07 | 34 | 34841 | 2008-10-29 |
3 | 10292 | 2004-02-18 | 19 | 26324 | 2007-03-14 | 35 | 35342 | 2008-12-03 |
4 | 10793 | 2004-03-24 | 20 | 26825 | 2007-04-18 | 36 | 35843 | 2009-01-07 |
5 | 11294 | 2004-04-28 | 21 | 27827 | 2007-06-27 | 37 | 36344 | 2009-02-11 |
6 | 11795 | 2004-06-02 | 22 | 28328 | 2007-08-01 | 38 | 36845 | 2009-03-18 |
7 | 12296 | 2004-07-07 | 23 | 28829 | 2007-09-05 | 39 | 38348 | 2009-07-01 |
8 | 12797 | 2004-08-11 | 24 | 29330 | 2007-10-10 | 40 | 38849 | 2009-08-05 |
9 | 13298 | 2004-09-15 | 25 | 29831 | 2007-11-14 | 41 | 39350 | 2009-09-09 |
10 | 13799 | 2004-10-20 | 26 | 30332 | 2007-12-19 | 42 | 39851 | 2009-10-14 |
11 | 14801 | 2004-12-29 | 27 | 30833 | 2008-01-23 | 43 | 40352 | 2009-11-18 |
12 | 15803 | 2005-03-09 | 28 | 31334 | 2008-02-27 | 44 | 40853 | 2009-12-23 |
13 | 19811 | 2005-12-14 | 29 | 31835 | 2008-04-02 | 45 | 41354 | 2010-01-27 |
14 | 21815 | 2006-05-03 | 30 | 32336 | 2008-05-07 | 46 | 41855 | 2010-03-03 |
15 | 23318 | 2006-08-16 | 31 | 33338 | 2008-07-16 | 47 | 42356 | 2010-04-07 |
16 | 24320 | 2006-10-25 | 32 | 33839 | 2008-08-20 | 48 | 45133 | 2010-10-18 |
Fig. 2 Technique flow chart图2 研究技术流程图 |
Fig. 3 PS-InSAR data processing procedures图3 PS-InSAR数据处理过程图 |
Fig. 4 The computation of uneven subsidence图4 不均匀沉降区域计算 |
Fig. 5 Sub study area图5 子研究区域 |
Tab. 2 The parameters of high resolution image表2 高分辨率影像参数 |
影像 类型 | 太阳方位角/° | 太阳高度角/° | 卫星方位角/° | 卫星高度角/° | 时间 |
---|---|---|---|---|---|
QuickBird GeoEye | 171.30 142.89 | 34.40 60.97 | 236.20 177.52 | 68.60 73.63 | 2008-11-04 2009-08-11 |
Fig. 6 The relationship between building shadow, sun and satellite’s altitude and azimuth angles图6 太阳和卫星高度角、方位角与地面建筑阴影的关系 |
Fig. 7 The result of land subsidence图7 沉降结果图 |
Fig. 8 Timeseriesof subsidence rate of the funnel center图8 漏斗中心时序沉降速率图 |
Tab. 3 Comparison between leveling and PS-InSAR measurements表3 水准结果与PS-InSAR测量结果对比 |
水准测点 | 纬度/° | 经度/° | 水准形变/mm | PS-视线向形变/mm | 差值/mm | 时间 |
---|---|---|---|---|---|---|
天竺 | 40.06674 | 116.58833 | -32.91 | -34.36 | 1.45 | 2010-01-27至2010-10-18 |
新建村 | 39.92544 | 116.65795 | -37.50 | -35.83 | 1.67 | 2009-10-14至2010-10-18 |
龙旺庄 | 39.92245 | 116.68558 | -30.50 | -30.55 | 0.05 | 2009-10-14至2010-10-18 |
注:水准测量值为与SAR影像监测同期的水准测量结果 |
Fig. 9 The floors’ acquisition and proof图9 楼层提取与校对 |
Fig. 10 The result of regression analysis图10 回归分析结果 |
The authors have declared that no competing interests exist.
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