Inside the Edwards Aquifer: A Three Part Technical Film, High School Level Teacher's Guide Page: 15
47 p. : ill.View a full description of this pamphlet.
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(1) Have a student(s) paint a cross-section of the Edwards system on the
pegboard (use the EUWD poster: Water Resources of the Edwards Aquifer
Region as a guide). This painting should closely match the locations of all the
devices mounted here (see diagram).
(2) The model can also represent the effect of pumping by adding one more
drilled hole in the artesian area and adding a triple gang valve. Keep the valves
closed until you have regulated your inflow, then open the valves one at a time
to see effects of pumping on the index well and springs (also indicated on
diagram). Have students identify groups that could possibly be the large
"pumpers" represented by the triple gange valve.
(See page 16 for model diagram.)15
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Edwards Underground Water District (Tex.). Inside the Edwards Aquifer: A Three Part Technical Film, High School Level Teacher's Guide, pamphlet, 1993; San Antonio, Texas. (https://texashistory.unt.edu/ark:/67531/metapth1203801/m1/21/: accessed July 12, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.