Table 4 Presents the correlation coefficients between each groundwater well and InSAR results. It can be observed from the table that the subsidence results from InSAR lag behind the groundwater level changes to varying degrees, with a lag of 1 to 2 months observed in most areas compared to groundwater level changes.

From: Ground subsidence evolution and groundwater variation in the middle route of south to north water diversion project

ID

Name

InSAR lag time

No

Lag 1 month

Lag 2 month

1

SY Goubei

0.63

0.74

0.60

2

SY Wangjiachang

0.66

0.76

0.58

3

HD Daniufang

0.61

0.72

0.57

4

Xicheng library

0.7

0.69

0.60

5

TZ Xiaonandi

0.74

0.673

0.56

6

CP Xiaotangshan

0.44

0.6

0.44

7

LF Xiaoshenzhuang

0.91

0.90

0.84

8

LF Donggu port

0.601

0.604

0.38

9

LF Yongqing

0.535

0.71

0.587

10

TJ Wuqing

0.85

0.834

0.842

11

XT Weixian

0.65

0.68

0.695

12

CZ Xianxian

0.806

0.78

0.68

13

HDA Linzhang

0.578

0.58

0.648

14

SZ Mucun

0.79

0.815

0.87

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