Seymour Aquifer interactive map | cross-section

Summary

The Seymour Aquifer is a major aquifer extending across northcentral Texas. The aquifer consists of Quaternary-age, alluvial sediments unconformably overlying Permian-age rocks. Water is contained in isolated patches of alluvium as much as 360 feet thick composed of discontinuous beds of poorly sorted gravel, conglomerate, sand, and silty clay.

Water ranges from fresh to slightly saline, containing from approximately 100 to 3,000 milligrams per liter of total dissolved solids; however, moderately to very saline water, containing 3,000 to more than 10,000 milligrams per liter of total dissolved solids, exists in localized areas. Throughout its extent, the aquifer is affected by nitrate in excess of primary drinking water standards. Excess chloride also occurs throughout the aquifer.

Almost all of the groundwater pumped from the aquifer − 90 percent − is used for irrigation, with the remainder used primarily for municipal supply. Predictive groundwater availability modeling based on future estimates of pumping indicates that average water levels are not expected to change by more than several feet in the Seymour Aquifer, with or without a drought of record. Water levels in localized areas are predicted to decline in the Seymour Aquifer by as much as 30 feet. Actual water level declines have reduced the saturated thickness in some areas.

Reports

ID Date Type Description
GMA6_DFC_01 7/22/2010 DFC submission Desired future conditions for the Blaine, Dockum, Ogallala, and Seymour aquifers
B-6310 12/1/1973 Groundwater bulletin Reconnaissance Investigation of the Ground-Water Resources of the Brazos River Basin, Texas
B-6521 8/1/1965 Groundwater bulletin Investigation of Ground-Water Contamination, Rhineland Area, Knox County, Texas
R-224 10/1/1978 TWDB numbered report Occurrence, Quantity, and Quality of Ground Water in Taylor County, Texas
R-337 3/1/1992 TWDB numbered report Evaluation of Water Resources in Parts of the Rolling Prairies Region of North-Central Texas
R-226 12/1/1978 TWDB numbered report Th Seymour Aquifer Ground-Water Quality and Availability in Haskell and Knox Counties, Texas, Volumes 1 & 2
R-119 7/1/1970 TWDB numbered report Ground-Water Resources of Collingsworth County, Texas
R-161 11/1/1972 TWDB numbered report Ground-Water Resources of Hardeman County, Texas
R-167 4/1/1973 TWDB numbered report Ground-Water Resources of Hall and Eastern Briscoe Counties, Texas
R-215 4/1/1978 TWDB numbered report Occurrence, Quality, and Availability of Ground Water in Jones County, Texas
R-218 7/1/1978 TWDB numbered report Occurrence and Quality of Ground Water in Baylor County, Texas
R-240 11/1/1979 TWDB numbered report Occurrence, Quality, and Quantity of Ground Water in Wilbarger County, Texas
GMA6_DFC_02 7/19/2011 DFC submission Desired future conditions for the Blaine and Seymour aquifers
GT11-006 6/3/2011 GAM task Predictive simulations for the Seymour and Blaine aquifers in Groundwater Management Area 6
GR10-021_MP 7/22/2010 GAM run - Management Plan Management plan information for Rolling Plains GCD
GR10-007_MP 7/20/2010 GAM run - Management Plan Management plan information for Gateway GCD
GR09-017_MP 7/24/2009 GAM run - Management Plan Management plan information for Clear Fork UWCD
GR08-057_MP 8/8/2008 GAM run - Management Plan Management plan information for Gateway GCD
GR08-054_MP 8/1/2008 GAM run - Management Plan Management plan information for Mesquite GCD
GR08-044 11/7/2008 GAM run Predictive simulation for the Seymour and Blaine aquifers in Groundwater Management Area 6
GR05-038 1/27/2005 GAM run Predictive simulation for the Seymour Aquifer in Collingsworth County
GR05-033 8/8/2005 GAM run Recharge information for the Seymour and Blaine aquifers in Knox, Baylor, and Haskell counties
GR05-017 5/16/2005 GAM run Saturated thickness maps for the Blaine and Seymour aquifers in Region A
GR05-006 3/21/2005 GAM run Water budget for Hardeman and Foard counties in Tri-County GCD
GR05-002 3/1/2005 GAM run Water budget for Fisher County
GR04-022 3/4/2005 GAM run Volume in storage for Seymour and Baline aquifers in Childress, Collingsworth, Hall, and Wheeler counties
GR10-058_MAG 12/7/2011 GAM run - MAG Modeled available groundwater estimates for the Seymour Aquifer in Groundwater Management Area 6
R-380 7/1/2011 TWDB numbered report Aquifers of Texas
GR13-017_MP 8/7/2013 GAM run - Management Plan Management plan data for Mesquite GCD
GT13-025_TERS 8/20/2013 GAM task - Total Estimated Recoverable Storage Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 1
GT13-026_TERS 9/19/2013 GAM task - Total Estimated Recoverable Storage Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 2
GT13-029_TERS 9/19/2013 GAM task - Total Estimated Recoverable Storage Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 6
GT13-030_TERS 10/2/2013 GAM task - Total Estimated Recoverable Storage Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 7
GR14-007_MP 7/25/2014 GAM run - Management Plan Management plan data for Clear Fork GCD
No Result