Spatial-Temporal Evolution Characterization of Land Subsidence by Multi-Temporal InSAR Method and GIS Technology
CHEN Bei-bei1, 2, 3, GONG Hui-li1, 2, 3*, LI Xiao-juan1, 2, 3, LEI Kun-chao1,4, DUAN Guang-yao1, 2, 3，XIE Jin-rong1, 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, Beijing 100048, China 4. Beijing Institute of Hydrogeology and Engineering Geology, Beijing 100195, China
Abstract：Long-term over-exploitation of underground resources, and static and dynamic load increase year by year influence the occurrence and development of regional land subsidence to a certain extent. Choosing 29 scenes Envisat ASAR images covering plain area of Beijing, China, the present paper used the multi-temporal InSAR method incorporating both persistent scatterer and small baseline approaches, and obtained monitoring information of regional land subsidence. Under different situation of space development and utilization, the authors chose five typical settlement areas; With classified information of land-use, multi-spectral remote sensing image, and geological data, and adopting GIS spatial analysis methods, the authors analyzed the time series evolution characteristics of uneven settlement. The comprehensive analysis results suggests that the complex situations of space development and utilization affect the trend of uneven settlement; the easier the situation of space development and utilization, the smaller the settlement gradient, and the less the uneven settlement trend.
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