Question 1 1 pts A storage area between impermeable layers of rock from which gr

Question

Question 1 1 pts A storage area between impermeable layers of rock from which groundwater can be obtained from a well is referred to as a(n): O vadose zone source O reservoir O aquifer effluent stream basin Question 2 1 pts Fresh water withdrawals have decreased since 1980 while the population of the United States has continued to increase. This suggests that: O the price of water has skyrocketed O technological innovation has made a water substitute available improvements have been made in water management and water conservation the major uses of fresh water are currently for irrigation the quality of the water has deteriorated

Explanation / Answer

1)Aquifer

An aquifer is a body of saturated rock through which water can easily move. Aquifers must be both permeable and porous and include such rock types as sandstone, conglomerate, fractured limestone and unconsolidated sand and gravel. Fractured volcanic rocks such as columnar basalts also make good aquifers. The rubble zones between volcanic flows are generally both porous and permeable and make excellent aquifers. In order for a well to be productive, it must be drilled into an aquifer. Rocks such as granite and schist are generally poor aquifers because they have a very low porosity. However, if these rocks are highly fractured, they make good aquifers. A well is a hole drilled into the ground to penetrate an aquifer. Normally such water must be pumped to the surface. If water is pumped from a well faster than it is replenished, the water table is lowered and the well may go dry. When water is pumped from a well, the water table is generally lowered into a cone of depression at the well. Groundwater normally flows down the slope of the water table towards the well.

2)improvements have been made in water management and water conservation

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