Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, NY 14850, USA.
Sci Adv. 2018 Aug 29;4(8):eaar8144. doi: 10.1126/sciadv.aar8144. eCollection 2018 Aug.
The Tulare Basin in Central California is a site of intensive agricultural activity and extraction of groundwater, with pronounced ground subsidence and degradation of water resources over the past century. Spatially extensive observations of ground displacements from satellite-based remote sensing allow us to infer the response of the aquifer system to changes in usage and to marked recharge events such as the heavy winter rainfall in 2017. Radar imagery from the Sentinel-1a/b satellites (November 2014 to October 2017) illuminates secular and seasonal trends modulated by changes in withdrawal rates and the magnitude of winter precipitation. Despite the increased precipitation in early 2017 that led to a marked decrease, or in some areas, reversal, of subsidence rates, subsidence returned to rates observed during the drought within a matter of months.
加利福尼亚州中部的图莱里盆地是农业活动和地下水开采的集中地，在上个世纪，该地区地面沉降明显，水资源退化。基于卫星的遥感技术对地面位移进行了广泛的空间观测，使我们能够推断含水层系统对使用变化和明显补给事件（如 2017 年冬季强降雨）的响应。Sentinel-1a/b 卫星的雷达图像（2014 年 11 月至 2017 年 10 月）揭示了受开采速率变化和冬季降水强度调制的季节性和季节性趋势。尽管 2017 年初的降水增加导致沉降速率明显下降，或者在某些地区出现反转，但沉降在数月内又恢复到干旱期间的速率。
