Gulf Coast Association of Geological Societies Transactions
Vol.
58 (
2008),
Pages
303-
303
ABSTRACT: Boundary Changes and Additions to the Aquifers of Texas
Peter G. George and Robert E. Mace
Texas Water Development Board, 1700 N. Congress Ave., P.O. Box 13231, Austin,
Texas 78711-3231
ABSTRACT
The Texas Water Development Board (TWDB) periodically updates the maps of
Texas aquifers to add newly recognized aquifers or to update aquifer boundaries.
For
the 2007 State Water Plan, TWDB adjusted the boundaries of several of the state's
aquifers,
including the Blaine, Bone Spring – Victorio Peak, Edwards (Balcones
Fault Zone),
Igneous, Lipan, Ogallala, Pecos Valley, Seymour, and Trinity aquifers. These
changes
were made based on groundwater availability modeling (GAM) studies, other scientific
studies, and comments from the public supported by existing information. Similar
changes are possible for the 2012 State Water Plan, based in part on new work
being
done on brackish water resources in the state. These include increasing the
size of the
Dockum Aquifer to match the extent of Dockum Group rocks, refining the subsurface
extent of the Marble Falls Aquifer, and refining the boundary of Yegua-Jackson
Aquifer
based on a recent GAM study. It is possible that new aquifers will be added
to the current
list, including the Colorado River Alluvium and the Austin Chalk. Another recent
GAM study in the area of the Llano Uplift may improve the definition of boundaries
of
aquifers in that area.
Copyright © 2008, The Gulf Coast Association of Geological Societies. All Rights Reserved.