Ground Water Hydrology

What is an aquifer?

• A type of surface water body

• An underground reservoir inside rocks

• A method of water purification

• A type of soil erosion

What is the main difference between confined and unconfined aquifers?

• Unconfined aquifers are under pressure

• Confined aquifers are sandwiched between non-permeable layers

• Unconfined aquifers are found only in deserts

• Confined aquifers are always dry

What does drawdown in a well refer to?

• The depth of the well

• The rate of water flow into the aquifer

• The difference between pumping and static water levels

• The total amount of water in the aquifer

What type of aquifer allows water to expand and contract freely?

• Permeable aquifer

• Artesian aquifer

• Unconfined aquifer

• Confined aquifer

What is artesian water?

• Water that is always stagnant

• Water that is treated for drinking

• Water that flows under pressure from a confined aquifer

• Water that is collected from surface runoff

What is the purpose of measuring drawdown in a well?

• To calculate the temperature of the water

• To ensure the source water is adequate

• To assess the soil quality

• To determine the depth of the well

What does the term 'permeability' refer to in the context of aquifers?

• The total volume of water in an aquifer

• The pressure of water in a confined aquifer

• The ability of soil to retain water

• The ability of soil to allow water to pass through

What is specific capacity of a well?

• The total volume of water it can hold

• The rate at which water can be pumped out

• The pressure of the water in the aquifer

• The depth of the well

What happens to the pressure in a confined aquifer when new water enters?

• The pressure decreases

• The pressure remains constant

• The pressure builds up

• The pressure is irrelevant

What is the primary source of recharge for unconfined aquifers?

• Industrial wastewater

• Groundwater from confined aquifers

• Rainfall and surface water

• Desalination plants