River Health

Transparency is a measure of...

• bacteria in the water
• water clarity
• suspended solids
• how polluted it is

Which of the following is an important element for fish and other aquatic animals to live?

• dissolved oxygen

• substrate

• brackish water

• algae

Stream flow is a measure of...

• The speed of the water in ft/sec
• The algae in the water
• The area of a section of river
• The volume of water moving past a point in cubic ft/sec

Which is a positive effect of high stream flow values?

• more erosion of stream banks
• lack of sunlight for plants 
• stream can tolerate higher levels of pollution
• Smothering homes of bottom dwelling fish

When water is moving rapidly, the amount of dissolved oxygen _________________.

• increases
• decreases
• stays the same

When the temperature of water increases, the amount of dissolved oxygen _________________.

• increases
• decreases
• stays the same

Is it better to have a higher or lower transparency for the overall health of a river?

• higher
• lower
• doesn't affect the health of a river

Which of the following would you expect to see in a stream with lower transparency?

• healthier fish
• warmer water
• higher levels of oxygen
• less sediment

A river that gets a lot of runoff is more likely to...

• have more erosion

• have low nitrate levels
• have less pollution
• have higher transparency

Which factors contribute to a river's overall health?

• transparency
• dissolved oxygen
• stream flow rate
• all of the answers are correct