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Regional Groundwater Flow

Regional Groundwater Flow. I. Introduction A. Diagram. “ the water table is a subdued replica of the surface topography”. II. Groundwater Flow Patterns. GW Divide. II. Groundwater Flow Patterns. GW Divide. II. Groundwater Flow Patterns. Hinge Line. Recharge Zone. Discharge Zone.

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Regional Groundwater Flow

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  1. Regional Groundwater Flow

  2. I. Introduction A. Diagram “ the water table is a subdued replica of the surface topography”

  3. II. Groundwater Flow Patterns

  4. GW Divide II. Groundwater Flow Patterns

  5. GW Divide II. Groundwater Flow Patterns Hinge Line

  6. Recharge Zone Discharge Zone Discharge Zone GW Divide II. Groundwater Flow Patterns Hinge Line

  7. III. Piezometer Patterns

  8. Effects of Topography Toth systems of flow local intermediate regional

  9. Effects of Topography

  10. Effects of Topography

  11. V. Flow System Mapping (recharge and discharge zones)

  12. V. Flow System Mapping (recharge and discharge zones) • Topography

  13. V. Flow System Mapping (recharge and discharge zones) • Topography • Piezometer Trends

  14. V. Flow System Mapping (recharge and discharge zones) • Topography • Piezometer Trends • Hydrochemical Trends

  15. V. Flow System Mapping (recharge and discharge zones) • Topography • Piezometer Trends • Hydrochemical Trends • Environmental Isotopes

  16. V. Flow System Mapping (recharge and discharge zones) • Topography • Piezometer Trends • Hydrochemical Trends • Environmental Isotopes • Soil, Vegetation and Land Surface Features

  17. VI. Salt Water Encroachment A. The problem

  18. VI. Salt Water Encroachment B. Possible Solutions 1. modification of pumping pattern

  19. VI. Salt Water Encroachment B. Possible Solutions 2. artificial recharge

  20. 3. pumping troughs

  21. 4. freshwater ridge (injection barrier)

  22. 5. subsurface barrier

  23. VI. Salt Water Encroachment B. Possible Solutions 1. modification of pumping pattern 2. artificial recharge 3. pumping troughs 4. freshwater ridge (injection barrier) 5. subsurface barrier

  24. VI. Salt Water Encroachment C. Predicting the Intrusion Ghyben-Herzberg Principle z(x,y) = ρw * h(x,y) ρs - ρw

  25. VI. Salt Water Encroachment C. Predicting the Intrusion Ghyben-Herzberg Principle z(x,y) = ρw * h(x,y) ρs - ρw If ρs = 1.025; ρw = 1.000 then z(x,y) = 40h(x,y)

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