Class 3- effects of urbanization on watersheds

Question 1

What does urban development do the stream and the floodplain?

Answer 1

• wider and deeper bc of higher and faster volume of water in stream
• the deeper the stream get, the less connected to the floodplain.stream can’t dispense energy to floodplain.
• more sediment
• floodplain limit line moves higher.

Question 2

What is the flood hazard limit?

Answer 2

• determined by 100 yr return storm volume

- aren’t accurate, shifting baselines.

Question 3

explain the aggradation phase in geomorphology

Answer 3

-sediment enters stream from development

Question 4

Why do we care about very fine sediments?

Answer 4

if they are 63 micros/smaller, they are very absorptive of chemicals. lots of small particles tend to clump together, and the big clumps chemical levels very high

Question 5

by what standard do we judge surface water?

Answer 5

by the provincial water quality objectives

Question 6

What are the implications of the cone of depression on ground water?

Answer 6

-cone area under different form of pressure, it alters the speed of water going from saturated zone to unsaturated zone.

Question 7

What are wellhead protection sensitivity areas?

Answer 7

restricts salt/nutrient contamination in drinking well areas.