Exam 12: Groundwater

What are disappearing streams?

What effect do water wells have on an aquifer?

The energy for the downward movement of groundwater is provided by gravity.

The major source of the water stored as groundwater is ____________________.

Which of the following is most porous?

Briefly explain why the artesian-pressure surface slopes.

What methods are used to counteract saltwater incursion?

Which of the following is most permeable?

How do landfills cause groundwater contamination? What can be done in the construction of a landfill that will make it less likely to contaminate groundwater?

Discuss the artesian system that underlies South Dakota and extends to central Texas in the Dakota Sandstone.

During times of drought, the water table ____________________.

By definition, the porosity of rocks/sediments consists of pore spaces between particles/grains.

On what factors does permeability depend?

Slightly acidic water reacts with calcite in an aquifer to form soluble sodium bicarbonate.

The zone above the water table, in which water is absent, is the:

Artesian wells can flow for hundreds of years.

A permeable layer that transports water is called a(n) ____________________.

What is an artesian system? What three geologic conditions must exist for an artesian system to form?

A local aquiclude within a larger aquifer results in a(n):

The energy produced from Earth's internal heat is ____________________ energy.