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The Analysis of Cave Dripwaters and Cave Calcite Deposits with GIS Resources

The Analysis of Cave Dripwaters and Cave Calcite Deposits with GIS Resources. Central Texas Cave Project. Central Texas Cave Project. Constituents of Concern Include:. Central Texas Cave Project. Constituents of Concern Include: Driprates of Cave Dripwaters. Pic of Dripping stalagtite.

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The Analysis of Cave Dripwaters and Cave Calcite Deposits with GIS Resources

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  1. The Analysis of Cave Dripwaters and Cave Calcite Deposits with GIS Resources

  2. Central Texas Cave Project

  3. Central Texas Cave Project Constituents of Concern Include:

  4. Central Texas Cave Project Constituents of Concern Include: Driprates of Cave Dripwaters Pic of Dripping stalagtite

  5. Central Texas Cave Project Constituents of Concern Include: Calcite Growth

  6. Central Texas Cave Project Constituents of Concern Include: Dripwater Geochemistry

  7. Central Texas Cave Project Constituents of Concern Include: Dripwater Geochemistry • pH • Conductivity • Major Ions • Isotopic Compositions (Oxygen, Deuterium, Carbon) • Alkalinity

  8. What affects the geochemistry of these waters? What affects the rates of calcite growth?

  9. Project Objectives Use GIS to determine: • Precipitation • Overlying Soils • Land Cover

  10. Study Area • Caverns of Sonora • Natural Bridge Caverns • Innerspace Caverns

  11. Project Objectives Use GIS to determine: • Precipitation • Overlying Soils • Land Cover

  12. Texas Average Annual Precipitation Source: Texas Water Development Board

  13. Central Texas Average Annual Precipitation Source: Texas Water Development Board

  14. Central Texas Average Annual Precipitation • Caverns of Sonora lies within 20-22 inches per year Source: Texas Water Development Board

  15. Central Texas Average Annual Precipitation • Caverns of Sonora lies within 20-22 inches per year • Natural Bridge Caverns and Innerspace Caverns lie within 30-35 inches per year Source: Texas Water Development Board

  16. Are differences in precipitation evident in cave driprates?

  17. Driprates Caverns of Sonora has average driprates much smaller than Innerspace Caverns and Natural Bridge Caverns

  18. Are differences in precipitation evident in cave calcite growth?

  19. Calcite Precipitation Caverns of Sonora isn’t growing much calcite!

  20. Project Objectives Use GIS to determine: • Precipitation • Overlying Soils • Land Cover

  21. Are differences in soil type above each cave evident in cave dripwater geochemistry?

  22. Source: Statsgo Soil Database

  23. Caverns of Sonora- MUID TX544 Natural Bridge Caverns- MUID TX105 Innerspace Caverns- MUID TX153 Source: Statsgo Soil Database

  24. Caverns Of Sonora Innerspace Caverns Natural Bridge Caverns Source: Statsgo Soil Database

  25. Project Objectives Use GIS to determine: • Precipitation • Overlying Soils • Land Cover

  26. How do differences in land cover change the geochemistry of the cave dripwaters?

  27. Source: NLCD 1992 Land Cover Dataset

  28. Caverns of Sonora Innerspace Caverns Natural Bridge Caverns Source: NLCD 1992 Land Cover Dataset

  29. Conclusions • GIS is a useful tool for delineating spatial heterogeneity over land surfaces • GIS is useful in bringing together many different parameters in which relationships may exist

  30. Future Work • Determine other factors (fractures, bedrock, evapotranspiration) that may be influencing the different chemical constituents that are analyzed in the caves • Use tracking analyst to determine driprate and geochemical response to rainfall events

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