基于PS-InSAR的天津市建设用地演变对地表沉降影响研究  

Study on the impact of construction land evolution on land subsidence in Tianjin based on PS-InSAR

作　　者：张宁月 徐方 曹永强 么嘉棋 李世金 ZHANG Ningyue;XU Fang;CAO Yongqiang;YAO Jiaqi;LI Shijin(Academy of Eco-Civilization development for Jing-Jin-Ji Megalopolis,Tianjin Normal University,Tianjin 300387;First Land and Planning Management Institute,Tianjin Jinan District,Tianjin 300350;Tianjin Monitoring Central Station of Geological Environment,Tianjin 300191;School of Environment and Spatial Informatics,China University of Mining and Technology,Xuzhou 221116)

机构地区：[1]天津师范大学京津冀生态文明发展研究院,天津300387 [2]天津市津南区第一土地和规划管理所,天津300350 [3]天津市地质环境监测总站,天津300191 [4]中国矿业大学环境与测绘学院,徐州221116

出　　处：《中国水利水电科学研究院学报（中英文）》2024年第5期477-490,共14页Journal of China Institute of Water Resources and Hydropower Research

基　　金：国家自然科学基金项目(52379021,52079060,42301501);天津师范大学研究生科研创新项目(2024KYCX049Z)。

摘　　要：地表沉降在城市化和工业化中越来越普遍,对人类社会和自然环境具有重要影响。本文以天津市作为研究区域,研究建设用地演变对地表沉降的影响。通过永久散射体干涉测量技术(Persistent Scatterer Interferometric Synthetic Aperture Radar,简称PS-InSAR)获取地表形变监测,并结合人类活动强度指数量化地表人类活动。主要结论如下:(1)从时间上看,2016—2023年天津市地表沉降面积整体呈现先减小后增加的趋势,沉降严重区和较严重沉降区占比下降约68%。从空间上看,基本形成了西南部和东部的五处沉降漏斗,并得到明显遏制。(2)2016—2022年天津市建设用地新增面积整体呈上升趋势,增长约45.22%。在其他用地类型基本不变的前提下,建设用地每新增0.1 km^(2),人类活动强度指数约上升0.077。(3)地表人类活动较为剧烈的点位周边,易发生地表沉降,并存在一年左右的滞后效应。增加地表负荷且持续性大面积的人类活动,易导致区域整体不稳定的地表沉降。仅改变地表形态且非持续性、小范围人类活动引发的地表沉降,沉降趋势将逐渐减缓。本文相关结论,对未来城市地表沉降防治、城市建设可持续发展规划和灾害风险评估具有重要意义。Land subsidence is becoming more and more common with urbanization and industrialization,and has an important impact on human society and the natural environment.In this paper,Tianjin is taken as the study area to investigate the influence of construction land evolution on land settlement.Surface deformation monitoring is obtained by Persistent Scatterer Interferometric Synthetic Aperture Radar(PS-InSAR)and combined with human activity intensity index to quantify surface human activities.The main conclusions are as follows:(1)From a temporal point of view,the land subsidence area of Tianjin in 2016-2023 shows an overall trend of decreasing and then increasing,and the proportion of the serious subsidence area and the more serious subsidence area decreases by about 68%,whereas from a spatial point of view,five subsidence funnels in the southwestern and eastern parts of the city are basically formed and significantly curbed.(2)The new area of construction land in Tianjin shows an overall upward trend from 2016 to 2022,increasing by about 45.22%.Under the premise that other land use types remain basically unchanged,for every 0.1 km^(2) of new construction land,the human activity intensity index rises by about 0.077.(3)Land subsidence is prone to occur in the vicinity of points with more intense surface human activities,and there is a time lag of about one year.Human activities that continuously increase surface load over a large area are likely to lead to unstable land subsidence throughout the region.Land subsidence triggered by non-continuous,small-scale human activities that only change the surface morphology will gradually slow down the settlement trend.The conclusions of this paper are of great significance for the prevention and control of urban land subsidence,the planning of sustainable development of urban construction,and the assessment of disaster risk in the future.

关 键 词：地表沉降 建设用地演变 PS-INSAR 人类活动强度 天津市 

分 类 号：TU478[建筑科学—结构工程]