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Understanding Groundwater: The Hydrologic Cycle and Its Impacts

Explore the fascinating world of groundwater through our comprehensive lecture. Discover how water moves through rocks, the concepts of permeability and porosity in various geological formations like sandstone and shale, and the dynamics of aquifers and aquicludes. Learn about the water table, hydraulic gradients, and the effects of groundwater pumping, including cone of depression and saltwater intrusion. We'll also delve into issues related to groundwater overuse and abuse, and discuss features like limestone caverns, karst topography, and sinkholes.

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Understanding Groundwater: The Hydrologic Cycle and Its Impacts

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  1. And Moses lifted up his hand,And with his rod he smote the rock twice: And the water came out abundantly:And the congregation drank and their beasts also. - Deuteronomy 6:11Groundwater Lecture 14 Webpage for course (daytime) Webpage for course (nighttime)

  2. Hydrologic Cycle

  3. Water moves THROUGH the rocks

  4. Hydrologic Cycle Permeability Porosity

  5. Sandstone • Shale • Porosity Permeability

  6. Aquiclude Aquifer

  7. So lets talk about the Water Table… Hydraulic gradient Springs

  8. Fig. 10.3 Fig. 10.7

  9. Lets pump some water…

  10. Lets pump a lot of water… Cone of Depression

  11. Fig. 10.10

  12. … near the coast Salt water incursion

  13. here is another situation … Confined Aquifer

  14. Groundwater You can use it. You can overuse it. You can abuse it.

  15. Groundwater abuse

  16. Fig. 10.16

  17. Groundwater Limestone caverns Geodes Fig. 10.23 http://fairiesonthewalk.com.au/shop/index.php%3FcPath%3D45&usg

  18. Groundwater Karst Topography http://www.virginiacaves.org/lok/ccvup56.htm&usg

  19. Sinkholes

  20. Fig. 10.26B

  21. Groundwater “water witching” (dousing)

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