1 The Hydrologic Cycle Where is the water? The global cycle Groundwater –The myth of underground rivers

2

3 Water source Water volume, in cubic miles Percent of total water Oceans317,000, % Icecaps, Glaciers7,000, % Ground water2,000, % Fresh-water lakes30, % Inland seas25, % Soil moisture16, % Atmosphere3, % Rivers % Total water volume326,000,000100% From USGS, similar to CS Table 17.2

4 How much of water is usable by humans? CS Figure 17.6

5 LH

6 CS Fig WET! DRY!

7 CS Fig. 17.2

8 CS Fig. 17.8

9 From USGS Porosity = spaces in rock Permeability = connectedness of spaces in rock Water table = level below which all spaces filled

10 An aquifer is a porous, water-bearing layer of sand, gravel or rock CS Fig Permeable! Impermeable!

11 The Rock Cycle Structure of the Earth Plate Tectonics Rocks and the Rock Cycle

12 Fig. 14.2

13 Fig Map of Tectonic Plates

14 CS Fig. 14.5

15 Fig Tectonic plate movement

16 Subduction animation

17 Types of Plate Boundaries  Divergent -Plates move away from each other  Convergent -Plates move towards each other  Transform -Plates slide past each other i.e. mid ocean ridges i.e. subduction zones

18 CS Fig Dec. 26 Earthquake

19

20

21 Model of Tsunami inflow and outflow at Phuket, Thailand Choowong et al., 2008 Marine Geology

22 Tsunami Links NY times /11/sot.tsunami.hit.japan.cnnhttp:// /11/sot.tsunami.hit.japan.cnn

23 Surface of the Earth

24 South American Trench

25 Atlantic Ocean Basin

26 CS Fig The Rock Cycle

27

28

29 Recent Lava Flow

30

31

32 The End. Back