Harris‐Galveston Subsidence District

www.hgsubsidence.org

2016 Groundwater Report

George Bush Intercontinental Airport

William P. Hobby Airport

Galveston

HGSD Exhibit 1

HGSD Exhibit 2 National Oceanic and Atmospheric Administration

HGSD Exhibit 3 National Oceanic and Atmospheric Administration

HGSD Exhibit 4 National Oceanic and Atmospheric Administration

HGSD Exhibit 5

HGSD Exhibit 6

HGSD Exhibit 7

HGSD Exhibit 8

HGSD Exhibit 9

HGSD Exhibit 10

HGSD Exhibit 11

HGSD Exhibit 17

HGSD Exhibit 18 Feet per decade

HGSD Exhibit 19 Feet per decade

HGSD PAM 29 Vertical GPS Data 2007‐2016

Pam 29 is operated by the HGSD and is located near the City of Katy

‐0.6

‐0.5

‐0.4

‐0.3

‐0.2

‐0.1

0

0.1

2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Vertical (ft)

Decimal‐Year

Vertical land surface deformation at PA29, 2007‐2016

Fit line

HGSD Exhibit 20

HGSD PAM 17 Vertical GPS Data 2011‐2016

Pam 17 is operated by the HGSD and is located near the City of Tomball

‐1.05

‐1

‐0.95

‐0.9

‐0.85

‐0.8

‐0.75

‐0.7

‐0.65

‐0.6

‐0.55

2011 2012 2013 2014 2015 2016 2017

Vertical (ft)

Decimal‐Year

Vertical land surface deformation at PA17, 2011‐2016

Fit line

HGSD Exhibit 21

HGSD PAM 08 Vertical GPS Data 1999‐2016

Pam 08 is operated by the HGSD and is located north of the City of Houston near Woodgate. 

‐1.5

‐1.25

‐1

‐0.75

‐0.5

‐0.25

0

0.25

1999 2001 2003 2005 2007 2009 2011 2013 2015 2017

Vertical (ft)

Decimal‐Year

Vertical land surface deformation at PA08, 1999‐2016 

Fit line

HGSD Exhibit 22

HGSD PAM 47 Vertical GPS Data 2007‐2016

Pam 47 is operated by the HGSD and is located near the City of Spring

Decimal-Year

HGSD Exhibit 23

Addicks Extensometer

HGSD Exhibit 24

Southwest Houston Extensometer

HGSD Exhibit 28

Northeast Houston Extensometer

HGSD Exhibit 25

Pasadena Extensometer

HGSD Exhibit 26

East End Extensometer

HGSD Exhibit 27

Lake Houston Extensometer

HGSD Exhibit 29

Baytown Shallow Extensometer

HGSD Exhibit 30

Baytown Deep Extensometer

HGSD Exhibit 31

Seabrook Extensometer

HGSD Exhibit 32

NASA Extensometer

HGSD Exhibit 33

Clear Lake Shallow Extensometer

HGSD Exhibit 34

Clear Lake Deep Extensometer

HGSD Exhibit 35

Texas City Extensometer

HGSD Exhibit 36

Harris‐Galveston Subsidence District

www.hgsubsidence.org

2016 Groundwater Report