Predictability of Hydraulic Head Changes and Characterization of Aquifer System Properties from InSAR-Derived Ground Deformation
Predictability of Hydraulic Head Changes and Characterization of Aquifer System Properties from InSAR-Derived Ground Deformation
复制标题
InSAR 地面变形水头变化的可预测性和含水层系统特性的表征
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
R. Bürgmann
中科院分区：
文献类型：
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作者：
E. Chaussard;R. Bürgmann
地下水管理主要依赖于地面观测，这是昂贵的和空间有限的。在这里，我们证明了空间派生的地面变形测量的好处，表征含水层属性和地下水位。我们使用干涉合成孔径雷达（干涉合成孔径雷达）的ERS，Envisat和ALOS数据的时间序列分析，以解决1992-2011年在圣克拉拉谷的垂直地面变形，加州的T型主成分分析成功地分离出了嵌入在多年代际时间序列中的随时间变化的变形模式。数据显示，1992-2000年期间的抬升速度为4毫米/年，2000-2011年的抬升速度为>1毫米/年，说明了在20世纪60年代低水位后水头恢复后多孔弹性回弹的结束--幅度为在被银溪断层（SCF）急剧分割的承压含水层上观察到3厘米的形变。将这种形变与水头数据相结合，可以表征流域范围的含水层系统的存储性。此外，我们表明，经过一段时间的校准，干涉合成孔径雷达可以用来准确地表征水位变化，而无需进行井测量。
Groundwater management relies mostly on ground-based observations, which are expensive and spatially limited� Here, we demonstrate the benefits of space-derived ground deformation measurements for characterization of aquifer properties and groundwater levels� We use Interferometric Synthetic Aperture Radar (InSAR) time-series analysis of ERS, Envisat, and ALOS data to resolve 1992-2011 vertical ground deformation in the Santa Clara Valley, California� T-mode Principal Component Analysis successfully isolates temporally variable deformation patterns embedded in the multi-decadal time series� The data reveal uplift at 4 mm/yr between 1992–2000 and >1 mm/ yr in 2000–2011, illustrating the end of the poroelastic rebound following recovery of hydraulic heads after the 1960s low stand� Seasonal elastic deformation with amplitude of 3 cm is observed over the confined aquifer sharply partitioned by the Silver Creek Fault (SCF)� Integration of this deformation with hydraulic head data enables characterization of basin-wide aquifer system storativity� Additionally, we show that after a period of calibration, InSAR can be used to accurately characterize water level changes without well measurements�