Measured data on primary and secondary consolidation of the clay layer

A physical model test has been carried out to study the groundwater dynamics, water balance, and deformation characteristics of the aquitard in response to an abrupt hydraulic head decline in the adjacent confined aquifer. The hydraulic head in the clay layer is initially constant. The hydraulic head in the lower sand layer declines suddenly by φ at the beginning and then remains unchanged during testing. We measured the drainage flux at the bottom of the aquifer and the subsidence of the clay layer.This supporting information document provides: (1)Supplementary Table 1 (Table S1), which presents time series data of the deformation of the clay layer (mm); (2) Supplementary Table 2 (Table S2), which gives time series data of the deformation rate of the clay layer (mm/min). (3)Supplementary Table 3 (Table S3), which gives the flux from the outlet of overflow tank using an electronic balance (Table S3).为研究相邻承压含水层（confined aquifer）水头（hydraulic head）突降条件下弱透水层（aquitard）的地下水动力学、水均衡及变形特征，本研究开展了物理模型试验。试验初始阶段，黏土层水头保持恒定，下部砂层水头在试验起始时刻突然下降φ值，随后在整个试验过程中维持不变。本试验测定了含水层底部的排泄通量与黏土层的沉降量。本辅助信息文档包含以下内容：(1) 补充表1（表S1），收录黏土层变形（单位：毫米）的时序数据；(2) 补充表2（表S2），给出黏土层变形速率（单位：毫米/分钟）的时序数据；(3) 补充表3（表S3），记录通过电子天平（electronic balance）测得的溢流槽（overflow tank）出口处的通量数据。