The Impact of Load Density Differences on Land Subsidence Based on Build-Up Index and PS-InSAR Technology
CHEN Bei-bei1, 2, 3, GONG Hui-li1, 2, 3*, LI Xiao-juan1, 2, 3, LEI Kun-chao1，4, ZHU Lin1, 2, 3, WANG Yan-bing1, 2, 3
1. Base of the State Key Laboratory of Urban Environmental Process and Digital Modeling, Capital Normal University, Beijing 100048, China 2. Key Laboratory of 3D Information Acquisition and Application, Ministry of Education, Capital Normal University, Beijing 100048, China 3. College of Resources Environment and Tourism Capital Normal University, Capital Normal University, Beijing 100048, China 4. Beijing Institute of Hydrogeology and Engineering Geology, Beijing 100195, China
Abstract：The excessive mining for underground water is the main reason inducing the land subsidence in Beijing, while, increasing of load brought by the urban construction aggravate the local land subsidence in a certain degree. As an international metropolis, the problems of land subsidence that caused by urban construction are becoming increasingly highlights, so revealing the relationship between regional load increase and the response of land subsidence also becomes one of the key problems in the land subsidence research field. In order to analyze the relationship between the load changes in construction and the land subsidence quantitatively, the present study selected the TM remote sensing image covering Beijing plain and used Erdas Modeler tool to invert the index based on building site (IBI), acquired the spatial and temporal change information in research area further; Based on results monitored by PS-InSAR (permanent scatterer interferometry) and IBI index method, and combined with the GIS spatial analysis method in the view of pixels in different scales, this paper analyzes the correlation between typical area load change and land subsidence, The conclusions show that there is a positive correlation between the density of load and the homogeneity of subsidence, especially in area which has a high sedimentation rate. Owing to such characteristics as the complexity and hysteretic nature of soil and geological structure, it is not obvious that the land subsidence caused by the increase of load in a short period. But with the increasing of local land load made by high density buildings and additional settlement of each monomer building superposed with each other, regional land subsidence is still a question that cannot be ignored and needs long-term systematic research and discussion.
Key words：Land subsidence;Load density;Index basing on building site(IBI);Permanent scatterer interferometry (PS-InSAR)
陈蓓蓓1，2，3，宫辉力1，2，3*，李小娟1，2，3，雷坤超1，4，朱 琳1，2，3，王彦兵1，2，3 . PS-InSAR技术与多光谱遥感建筑指数的载荷密度对地面沉降影响的研究 [J]. 光谱学与光谱分析, 2013, 33(08): 2198-2202.
CHEN Bei-bei1, 2, 3, GONG Hui-li1, 2, 3*, LI Xiao-juan1, 2, 3, LEI Kun-chao1，4, ZHU Lin1, 2, 3, WANG Yan-bing1, 2, 3 . The Impact of Load Density Differences on Land Subsidence Based on Build-Up Index and PS-InSAR Technology. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2013, 33(08): 2198-2202.
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