w at er- lv iu d s20 nch go , a ndj s p erqu if com …figure 12. map showing water-level changes in...

Figure 12. Map showing water-level changes in the Jasper aquifer, greaterHouston area, Texas, 2001–02.

OPEN-FILE REPORT 02–134Water-level changes, Jasper aquifer, 2001–02—SHEET 12 OF 15

Coplin, L.S., and Lanning-Rush, Jennifer, 2002, Water-level altitudes 2002 and water-level changes in the Chicot, Evangeline,and Jasper aquifers and compaction 1973–2001 in the Chicot and Evangeline aquifers, Houston-Galveston region, Texas

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U.S. DEPARTMENT OF THE INTERIORU.S. GEOLOGICAL SURVEY

Base from U.S. Geological Survey Digital data, 1:100,000Universal Transverse Mercator projectionZone 15

For additional information write to:District Chief

U.S. Geological Survey8027 Exchange Dr.

Austin, TX 78754–4733E-mail: dc_tx@usgs.gov

WATER-LEVEL ALTITUDES 2002 AND WATER-LEVEL CHANGES IN THE CHICOT, EVANGELINE,AND JASPER AQUIFERS AND COMPACTION 1973–2001 IN THE CHICOT AND EVANGELINE

AQUIFERS, HOUSTON-GALVESTON REGION, TEXASBy

L.S. Coplin and Jennifer Lanning-Rush2002

IN COOPERATION WITH THEHARRIS-GALVESTON COASTAL SUBSIDENCE DISTRICT,

CITY OF HOUSTON, ANDFORT BEND SUBSIDENCE DISTRICT

Boundary of study area

EXPLANATION

Updip limit of Jasper aquifer (University ofTexas, Bureau of Economic Geology, 1968,1974)

Measured water-level change at wellsbetween 2001 and 2002–Numberindicates magnitude of change

Decline of more than 50 feet

Decline of 21 to 50 feet

Decline of 11 to 20 feet

Decline of 1 to 10 feet

No change

Rise of 1 to 10 feet

23

1

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