Pore spaces of Earth materials filled with water Stream Water table during drought Well
1. Label the zone of saturation, the unsaturated zone, and the water table.
2. Describe the shape of the water table in relationship to the shape of the land surface.
3. Whenever a substantial amount of water is withdrawn from a well, the water table forms a cone of depression. Label the cone of depression on Figure 8.13. What factors might cause a cone of depression to become larger or smaller?
4. Use a pencil to shade the area between the dashed lines labeled A. This zone represents an impermeable lens of clay. Describe what will happen to water that infiltrates to the depth of the clay lens at point A.
5. How does the drop in the water table during a drought affect the operation of the well? The blue dashed line in Figure 8.13 represents the level of the water table during a drought.
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