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地面沉降-回弹及地下水位波动的InSAR长时序监测——以德州市为例

DOI: 10.6046/gtzyyg.2014.01.18, PP. 103-109

Keywords: 地面沉降,InSAR,相干目标,季节性地下水开采,非线性沉降

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Abstract:

过量开采地下水是诱发地面沉降的主要原因。以山东省德州地区季节性地面沉降-回弹为例,研究了利用相干目标(coherenttarget,CT)时序分析技术的地表形变InSAR监测技术。通过对该地区ENVISAT卫星ASAR数据的时序分析,获取了2004年1月—2010年10月近7a间地面沉降场的时空演变过程。针对德州市地面变形表现出的季节性特征,综合地下水开采、水准监测和降水量等资料的分析结果表明:该地区地面沉降主要受地下水季节性开采以及年降水量变化的控制,形成了每年3—8月快速下降,9月—翌年2月逐步回弹的变化特征,因此认为该区地面沉降与地下水位变化密切相关。

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