Updating the Hydrogeologic Framework for the Northern Portion of the Gulf Coast Aquifer Page: VI
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Final Report - Updating the Hydrogeologic Framework for the Northern Portion of the Gulf Coast Aquifer
Figure 2-12
Figure 2-13
Figure 2-14
Figure 2-15
Figure 2-16
Figure 2-17
Figure 2-18
Figure 2-19
Figure 2-20
Figure 2-21water sands overlie the dome. Groundwater salinities are interpreted from
resistivity logs (freshwater sands have >20 ohm-m resistivity) ........................ 2-27
Map of lower Chicot sand thickness around Barbers Hill salt dome
(modified from Hamlin and others, 1988). The lower Chicot sand is
widespread in the Houston area (Wesselman, 1971, 1972; Baker, 1979) ........ 2-27
Map of surficial sediments and depositional facies around Barbers Hill salt
dome (from Fisher and others, 1972). Pleistocene channel sand follows
peripheral low area east of the dome, whereas fine-grained interchannel
facies cover the dom e crest............................................................................... 2-28
Photograph showing catastrophic collapse and sinkhole that formed over
Hull salt dome in 2008 in the town of Daisetta, Liberty County, Texas
(from H orsw ell, 2009) .....................................................................................2-29
Map of Barbers Hill salt dome showing locations of storage caverns in the
salt stock and brine disposal wells in the cap rock as they existed in 1984
(modified from Seni and others, 1984c) .......................................................... 2-30
Cross section showing storage caverns and brine disposal wells at Barbers
Hill salt dome (modified from Seni and others, 1984c). Line of section
located in Figure 8. Storage cavern locations, depths, and dimensions are
accurate, but geometric details are generalized. Storage cavern geometries
are commonly delineated using sonar, and a sonar survey was available for
one cavern on this section (third cavern from the right).................................... 2-31
Cross section of Barbers Hill salt dome showing salt stock, cap rock, and
surrounding sediments (modified from Hamlin and others, 1988).
Groundwater salinities are interpreted from resistivity logs. Sands become
thinner and more saline with proximity to the dome. Sand thickness of the
lower Chicot sand is shown in Figure 2-12 ..................................................... 2-31
Hydrograph of a long-term cap rock injection test at Barbers Hill salt
dome showing brine-level changes in a cap rock observation well during
controlled brine disposal in two other cap rock wells (from Hamlin and
others, 1988). Water levels in nearby Chicot aquifer and Evangeline
aquifer water wells are around 100 feet below sea level or similar to cap
rock brine levels when no disposal is occurring. However, water levels in
nearby water wells were not monitored during the injection test ...................... 2-32
Resistivity map of the lower Chicot aquifer at Barbers Hill salt dome
(modified from Hamlin and others, 1988). Water wells completed in this
lower Chicot sand are also shown along with total dissolved solids
measurements. Low resistivities around the southern and southwestern
dome flanks delineate a high-salinity plume extending away from the salt
dom e in the down-flow direction...................................................................... 2-32
Schematic diagram showing a fluvial depositional system with its
component depositional environments and resulting genetic facies.
Modified from Galloway and others (1979) ................................................... 2-33
Schematic drawing of Quaternary depositional systems of the Texas
Coastal Plain. Modified from Winker (1979) and Galloway and others
(19 8 6 )............................................................................................................. . 2 -3 3vi
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Young, Steven C.; Ewing, Tom; Hamlin, Scott; Baker, Ernie & Lupton, Daniel. Updating the Hydrogeologic Framework for the Northern Portion of the Gulf Coast Aquifer, report, June 2012; Austin, Texas. (https://texashistory.unt.edu/ark:/67531/metapth542209/m1/8/: accessed August 15, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.