Records of Wells, Water Levels, Pumpage and Chemical Analyses of Water from the Carizzo Aquifer in the Winter Garden Area, Texas, 1970 through 1977 Page: 2
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The state is divided into 1-degree quadrangles of
latitude and longitude which are numbered 01 through
89. These are the first two digits in the well number.
Each 1-degree quadrangle is divided into 7%/-minute
quadrangles which are given two-digit numbers from 01
to 64. These are the third and fourth digits of the well
number. Each 7 -minute quadrangle is divided into
2%/-minute quadrangles which are given a single-digit
number from 1 to 9. This is the fifth digit of the well
n umbe r F in ally, each well within a 2 -minute
quadrangle is given a two-digit number in the order in
which it was inventoried, starting with 01. These are the
last two digits of the well number.
On the well location map (Figure 6), only the last
three digits are shown at each well location; the second
two digits are shown in the northwest corner of each
7 -minute quadrangle; and the first two digits are shown
by the large block numerals.
In addition to the seven-digit well number, a
two-letter prefix is used to identify the county. Theprefixes for the counties
this report are:Prefix
ALAY
BU
HZ
KB
KRKX
PZ
RX
For
C oun ty 4
quadrangleCounty
Atascosa
Bexar
Caldwell
Dimmit
F rio
Gonzales
Guadalupe
Karnesentirely or partially covered by
Prefix
sJ
SU
TB
TD
YP
YZ
ZL
ZXLa Salle
example, well
('A L); 1-degree
51; 2%-minutAL 68-51-404 is in
quadrangle 68; 7
:e quadrangle 4; andcfourth well inventoried in that 2 minute quad
Information on pumpage from the Carrizo aquifer
during 1970-75 is based in part on questionnaires mailed
County annually by the Texas Department of Water Resources
Live Oak to municipalities and industries. The following
procedure was used to estimate the amount of irrigation
Mc~ullenpumpage: (1) the annual number of cubic feet of natural
Maverick gas and kilowatt-hours of electricity supplies to the
irrigated farms from 1970 through 1975 was obtained
Medina from natural gas companies, power companies, and
Uvalde electrical cooperatives; (2) power and yield tests were
conducted on selected irrigation wells to determine the
webb average number of gallons produced per cubic foot and
wilson kilowatt hour; (3) the average number of gallons
produced per cubic foot and kilowatt-hour was
Zavala multiplied by the total number of cubic feet and
kilowatt-hours supplied by natural gas companies, power
companies, and electrical cooperatives to determine the
approximate annual irrigation pumpage. Where power
Atascosa information was not available for individual irrigation
-minute wells, estimates of pum page were made using em pirical
Iwas the judgements based on weather, pump horsepower, and
rangle. the individual s farming history.From English
Units
acre-feetfeet (ft)
gallons per minute
gal/mmn
inches (in)
square miles (mi2)Multiply
By
0.001230.3048
0.063 1
2.540
2.590To convert degrees Fahrenheit
are the following formulaTo Obtain
Metric Units
cubic hectometers
(hm')
meters (in)
liters per second
('/s)
centimeters (cm)
square kilometers
(kin2)
to degrees CelsiusMetric Conversions
F or those reader s interested in using the
International System (SI) of Units, the metric
equivalents of English units of measurements are given in
parentheses in the text. The English units used in this
report may be converted to metric units by the
following conversion factors:Most of the water pumped from the Carrizo
aquifer is used for irrigation. Zavala County used the
largest quantity for irrigation in 1970 and Frio County
used the largest amount during the period 1971 to 1975.
Estimated use of ground water for irrigation, public
supply, and industrial purposes from the Carrizo-Wilcox,
Queen City-Bigford, and Sparta-Laredo aquifers during
1975 is shown in Table 1. About 279,000 acre-feet
(344 hm3) of ground water was produced from these- 2-
0C=0.556 (0F-32)
PRESENTATION OF DATA
Ground-Water Pumpage
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Elder, Glenward R.; Duffin, Gail L. & Rodriguez, Eulogio, Jr. Records of Wells, Water Levels, Pumpage and Chemical Analyses of Water from the Carizzo Aquifer in the Winter Garden Area, Texas, 1970 through 1977, report, September 1980; Austin, Texas. (https://texashistory.unt.edu/ark:/67531/metapth1203994/m1/8/?q=%22~1%22~1: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.