Groundwater Monitoring and Management

Callen Bentley explains the structure and distribution of groundwater, highlighting that most of the world's freshwater is underground. The video covers how groundwater mimics the landscape, the concept of the water table, and how it is monitored using wells. It also discusses the interaction between groundwater and rivers, including gaining and losing streams.

What is the primary form in which most of the world's freshwater is stored?

• In rivers and lakes

• In ice sheets and glaciers

• In the atmosphere

• In underground reservoirs

What percentage of non-frozen freshwater is found underground?

• 100%

• 94%

• 75%

• 50%

How does the shape of the groundwater mimic the landscape above it?

• It is random and unpredictable

• It is always flat

• It mirrors the hills and valleys

• It forms a straight line

What separates the zone of saturation from the unsaturated zone?

• The atmosphere

• The bedrock

• The soil layer

• The water table

What tool is used to monitor groundwater levels?

• Well with a float and recorder

• Barometer

• Seismograph

• Thermometer

What does a steady decline in the water table over several months indicate?

• Earthquake activity

• Dry weather

• Heavy rainfall

• Increased groundwater extraction

How can weather patterns be inferred from groundwater data?

• By tracking the movement of groundwater

• By analyzing the chemical composition of groundwater

• By measuring the temperature of groundwater

• By observing changes in the water table

What is a gaining stream?

• A stream that loses water to the ground

• A stream that is disconnected from groundwater

• A stream that flows only during rain

• A stream that receives water from groundwater

What happens in a losing stream?

• Water flows from the groundwater into the stream

• The stream flows uphill

• Water flows from the stream into the groundwater

• The stream is disconnected from the groundwater

What occurs when a stream is disconnected from the groundwater?

• The stream dries up completely

• The stream becomes a gaining stream

• Water falls through the unsaturated zone before reaching the water table

• Water flows directly into the saturated zone