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GG103 Thirteenth Readings Discussion Questions

Groundwater

MacDonald, Abbott, and Peterson - Chapter 11, p. 229

1. Define groundwater.

2. Give the percentage of water used for domestic purposes supplied by groundwater.

3. Explain why groundwater must be monitored and regulated.

Groundwater Recharge

4. Give the source for groundwater in Hawai'i.

5. Define recharge.

6. Give the relative amounts of recharge and runoff in Hawai'i. (Also see fig. 10.2)

7. Explain why recharge in Hawai'i is so high.

8. Explain why lava rocks have high permeabilities.

Groundwater and Its Movement

9. Contrast the vadose zone (unsaturated) and phreatic zone (saturated). (Also see fig. 11.1)

10. Explain why aeration in the vadose zone is important to life.

11. Define water table. (Also see fig. 11.1)

12. Explain the correlation between groundwater flow and variations in the water table variations. (Also see fig. 11.2)

13. Give Darcy's Law.

14. Define Q, K, A, h, and L in Darcy's Law.

15. Give the average groundwater flow rate in Hawai'i.

16. Explain why the groundwater flow rate in Hawai'i is low.

17. Give the age range for deep groundwater in Hawai'i.

18. Define porosity.

19. Define permeability.

20. Define aquifer.

21. Define unconfined aquifer.

22. Define confined aquifer.

23. Explain why artesian wells flow without pumping. (Also see fig. 11.3)

24. Which type of rock forms the caprock near the coastal regions in Hawai'i to form confine aquifers? (See fig. 11.3)

25. Give the most important aquifer in Hawai'i. (Also see examples A and B)

26. List the two primary groundwater types in Hawai'i. (Also see figs. 11.4 and 11.6)

27. Which groundwater type is more abundant?