northern segment of the edwards aquifer study s pring 2014 stephanie s. wong and joe c. yelderman...
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Northern Segment of the Edwards Aquifer Study
SPRING 2014
Stephanie S. Wong and Joe C. Yelderman Jr.Baylor University, Geology Department
Tuesday, 11 February, 2014
Outline
1. Summary of summer 2013 dye trace study
2. Spring 2014 prioritiesi. Proposed Salado Spring dye trace
studyii. Instrumentationiii. Proposed Sanford Ranch dye trace
study
Completed: Summer 2013 Salado Creek dye trace test
• July 31st – August 1st • Injection at Stagecoach Inn Cave well– Uranine at 8:30 am– Eosine at 2:30 pm
• 15 monitoring sites along Salado Creek– Control: Robertson Plantation– Upstream: 2 sites– Downstream: 12 sites
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EOSINEURANINE
Findings• There appears to be groundwater discharge
across the creek from Big Boiling Spring.
• All the springs seem to be connected and function as an integrated system under low-flow conditions. – This supports the conclusion from USGS chemistry
results.– Managing the springs using the flow gage below
the springs appears reasonable.
• Flow from the Stagecoach Inn Cave well does not flow to Robertson Spring or upstream from Little Bubbly under low-flow conditions.
Proposed: Spring 2014 Salado Creek dye trace test
• PURPOSE: To study the Salado springs system under higher-flow conditions
• OBJECTIVES: – Replicate summer trace test
under (injection point, monitoring locations)
– Refine sampling and monitoring
– Add monitoring locations
New monitoring locations
• Robertson Spring• Little Bubbly• Salado Patio well?• Cemetery well
Little Bubbly spring run (Jan. 2014)
Refine monitoring
• Refine amount of dye used – Less uranine, more eosine
• Two Isco automated samplers if possible– Big Boiling springs – one fracture– Anderson spring– Extend sampling time to
catch tail
• Employ larger field teams
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North bank groundwater discharge
Salado Creek
Big Boiling Springs
?
?
• Source direction is unclear……
• Inject dye from north bank– Different dye
• Injection point:– Existing point, OR– Auger new hole
Instrumentation
• Budgeted:–Weather stations (2-4) - $3000– Rain gauges (15) - $450– Data loggers (3) - $6000– Flumes and weirs (2-4 as needed) -
$6000
Gault Site
Patterson’sCrossing
Rest-Stop well
Cemetery well
Datalogger
Weather station
Future: Sanford Ranch dye trace test
• PURPOSE: To study groundwater flow and connectivity in a wider study area in the Northern Segment of the Edwards Aquifer
Questions?
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