Shah, S.D.
Ramage, J.K
2018
Cumulative Compaction of Subsurface Sediments (2017) in 13 Extensometers in the Chicot and Evangeline Aquifers in the Houston-Galveston Region, Texas.
txt
Austin, TX
U.S. Geological Survey
https://doi.org/10.5066/F7D799Q9
The U.S. Geological Survey, in cooperation with the Harris‐Galveston Subsidence District, City of Houston, Fort Bend Subsidence District, and Lone Star Groundwater Conservation District, produced a dataset through 2017 of compaction values in the Chicot and Evangeline aquifers in the Houston‐Galveston region, Texas.
This dataset contains compaction values of subsurface sediments (mostly in the fine-grained silt and clay layers because little compaction occurs in sand layers) in the Chicot and Evangeline aquifers that were recorded continuously by using analog technology at the 13 extensometers at 11 sites that were either activated or installed between 1973 and 1980. At 2 of the 11 sites, two extensometers are installed at different depths (one shallow and one deep). The cumulative compaction data for each extensometer are collected about 13 times per year during site visits. Cumulative compaction data collected by each extensometer is provided, starting with the data from the year the extensometer was installed through most recently completed year (2017). The amount of cumulative compaction for each site visit is determined by subtracting the previously recorded compaction value from the ending compaction value.
This dataset was created by the U.S. Geological Survey in cooperation with the Harris‐Galveston Subsidence District, City of Houston, Fort Bend Subsidence District, Lone Star Groundwater Conservation District, and Brazoria County Groundwater Conservation District to provide resource managers, public officials, researchers, and the general public with ready access to accurate, impartial, scientific information regarding the cumulative compaction of subsurface sediments in Harris, Galveston, Fort Bend, Montgomery, Brazoria, Chambers, Grimes, Liberty, San Jacinto, Walker, and Waller Counties, Texas.
Most of the land-surface subsidence in the Houston-Galveston region, Texas, occurs as a direct result of groundwater withdrawals for municipal supply, commercial and industrial use, and irrigation that depressured and dewatered the Chicot and Evangeline aquifers, thereby causing compaction of the aquifer sediments, mostly in the fine-grained silt and clay layers.
1973
2017
ground condition
Annually
-95.935363769297
-94.732360839654
30.227843433648
29.192548620473
None
groundwater
subsidence
hydrology
aquifer
hypsometry
compaction
Chicot aquifer
Evangeline aquifer
elevation
extensometer
USGS Metadata Identifier
USGS:5aa986fde4b0b1c392f1715b
Geographic Names Information System (GNIS)
Texas
Harris County
Fort Bend County
Galveston County
none
none
Texas Water Science Center Public Information Officer
U.S. Geological Survey
mailing and physical
1505 Ferguson Lane
Austin
TX
78754
USA
(512) 927-3500
gs-w-txpublic-info@usgs.gov
Data were collected by the U.S. Geological Survey in cooperation with the following agencies: Harris-Galveston Subsidence District, Lone Star Groundwater Conservation District, City of Houston, Fort Bend Subsidence District, and Brazoria County Groundwater Conservation District
All feature attribute values were peer reviewed. Values were checked for correct data type and for presence/absence of data.
All cumulative compaction data values fall within the expected ranges. At the starting point of each extensometer record reported herein, the beginning amount of compaction is set to zero; for the purpose of computing cumulative compaction, any compaction prior to the date the site went online is not known and therefore cannot be considered.
Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
Horizontal positional accuracy of the point data is dependent on the source data used to define the location of the site (digital orthophotograph, GPS, survey, and so forth). Only the source data type and accuracy associated with the location of the extensometer site were retained in the U.S. Geological Survey Groundwater Site‐Inventory System of the National Water Information System (U.S. Geological Survey, 2017) accessed here, http://dx.doi.org/10.5066/F7P55KJN
Vertical positional accuracy of the site location is referenced to the North American Vertical Datum of 1988 (NAVD88) and is dependent on the source data used to define the location of the site well (U.S. Geological Survey 7.5-minute topographic quadrangle, digital elevation model (DEM)).
Kasmarek, M.C., Ramage, J.K., Johnson, M.R
2016
Water-level altitudes 2016 and water-level changes in the Chicot, Evangeline, and Jasper aquifers and compaction 1973-2014 in the Chicot and Evangeline aquifers, Houston-Galveston region, Texas
numerical
Reston, Virginia
U.S. Geological Survey
http://dx.doi.org/10.3133/sim3365
Report
20151201
20160331
ground condition
Scientific Investigations Map
This report provides information on the field operations and data collection methodology used to collect compaction data at extensometer sites in Houston, Texas. The instrumentation at extensometer sites records long-term cumulative compaction data.
U.S. Geological Survey
2017
NWISWeb: New Site for the Nation's Water Data
numerical
Reston, Virginia
U.S. Geological Survey
http://dx.doi.org/10.5066/F7P55KJN
Fact Sheet
20170101
20170102
publication date
NWIS
The NWIS website is an open data platform that stores USGS water data. All cumulative compaction data provided in this data release can be found on NWISWeb.
Gabrysch, R.K.
1979
Approximate water-level changes in wells in the Chicot and Evangeline aquifers, 1977-79, and measured compaction, 1973-79, in Harris and Galveston Counties, Texas
text
Reston, Virginia
U.S. Geological Survey
https://pubs.er.usgs.gov/publication/ofr79693
Report
19770111
19790205
ground condition
Open-File Report 79-693
This is the original report that provided the first groundwater-level altitude data and set the baseline for which all subsequent data is compared
Cunningham, W.L., and Schalk, C.W.
2011
Groundwater Technical Procedures of the U.S. Geological Survey
text
Reston, Virginia
U.S. Geological Survey
http://pubs.usgs.gov/tm/1a1/
Report
20110101
20111231
data compilation
USGS Techniques and Methods
This report describes procedures and guidelines developed by U.S. Geological Survey for collecting accurate and reliable water-level altitude data
Compaction values of subsurface sediments (mostly in the fine-grained silt and clay layers because little compaction occurs in sand layers) in the Chicot and Evangeline aquifers was recorded continuously by using analog technology at the 13 extensometers at 11 sites that were either activated or installed between 1973 and 1980. The cumulative compaction data for each extensometer are collected about 13 times per year during site visits. The amount of cumulative compaction for each site visit is determined by subtracting the previously recorded compaction value from the ending compaction value as explained in Kasmarek and others (2016) in the "Source Information" metadata.
20180130
Point
0.0000001
0.0000001
Degrees and decimal minutes
North American Datum of 1983
Geodetic Reference System of 1980
6378137
298.257222
North American Vertical Datum of 1988
1.0
feet
Explicit elevation coordinate included with horizontal coordinates
TABLE 1 Compaction_Site_Information
Description of each extensometer site location where cumulative compaction values measured in the Chicot and Evangeline aquifers in the Houston-Galveston region, Texas.
U.S. Geological Survey Texas Water Science Center
SITE_NO
U.S. Geological Survey 15‐digit site identification number in the NWIS database. This number is the primary ID used to retrieve data from NWIS.
U.S. Geological Survey
Unique identifier.
STATION_NM
Name of the extensometer defined by county identifier and state well number.
U.S. Geological Survey
Unique identifier.
GENERAL_NM
The common name of the extensometer site associated with the USGS site number.
U.S. Geological Survey
Unique site names.
DEC_LONG_VA
Longitude in decimal degrees and datum is North American Datum 1983. This number can be retrieved from NWIS.
U.S. Geological Survey
Longitude of the site.
DEC_LAT_VA
Latitude in decimal degrees and datum is North American Datum 1983. This number can be retrieved from NWIS.
U.S. Geological Survey
Latitude of the site.
AQUIFER
The name of the aquifer where the measured well is screened. The aquifer name came corresponding to each well can be retrieved from NWIS.
U.S. Geological Survey
Represents the name of the aquifer or hydrogeologic unit.
TABLES 2-14 Cumulative compaction data at each site
Measured compaction (in feet) data collected from the following extensometer sites: Addicks (Table 2), Texas City (Table 3), Southwest (Table 4), Seabrook (Table 5), Pasadena (Table 6), Northeast (Table 7), Lake Houston (Table 8), Johnson Space Center (Table 9), East End (Table 10), Clear Lake Shallow (Table 11), Clear Lake Deep (Table 12), Baytown Shallow (Table 13), and Baytown Deep (Table 14).
U.S. Geological Survey Texas Water Science Center
DATE
Month, day and year compaction data was measured.
U.S. Geological Survey Texas Water Science Center
Date the measured cumulative compaction value was measured.
CUMULATIVE_COMPACTION
Measured compaction data (in feet) recorded at each extensometer site.
U.S. Geological Survey
Multiple ranges of cumulative compaction (in feet) at each extensometer: Addicks (Table 2), Texas City (Table 3), Southwest (Table 4), Seabrook (Table 5), Pasadena (Table 6), Northeast (Table 7), Lake Houston (Table 8), Johnson Space Center (Table 9), East End (Table 10), Clear Lake Shallow (Table 11), Clear Lake Deep (Table 12), Baytown Shallow (Table 13), and Baytown Deep (Table 14).
U.S. Geological Survey - ScienceBase
U.S. Geological Survey
mailing and physical
Denver Federal Center, Building 810, Mail Stop 302
Denver
CO
80225
USA
1-888-275-8747
sciencebase@usgs.gov
Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this information product, for the most part, is in the public domain, it also contains copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner whenever applicable. The data have been approved for release and publication by the U.S. Geological Survey (USGS). Although the data have been subjected to rigorous review and are substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, the data are released on the condition that neither the USGS nor the U.S. Government may be held liable for any damages resulting from authorized or unauthorized use. Although the data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein. Users of this data are advised to read all metadata and associated documentation thoroughly to understand appropriate use and data limitations.
.txt
No compression applied
https://doi.org/10.5066/F7D799Q9
None
20200827
Texas Water Science Center Public Information Officer
U.S. Geological Survey
mailing and physical
1505 Ferguson Ln
Austin
TX
78754
US
(512) 927-3500
gs-w-txpublic-info@usgs.gov
Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998