2. If the velocity of the stream is increased as a result of the change in cross sectional area, what are the likely changes in erosion to occur to the stream down hill from your construction job? Just as likely Less likely More likely 3. In this next situation, you work for the county and you are planning a bridge for this arid braided stream. The county council says that "...a bridge this long [going across the width of stream] will be too expensive...", so you have been given the job of making the width of the stream smaller. You have learned about streams and know that if you decrease the width, then the velocity will increase under the bridge, possibly destablilizing the bridge abutments. They tell you to "figure out how to make it work within budget". What would you change and why? S 4. You live near a stream and your uphill neighbor didn't like the wet area near the stream and brought in fill to raise it up and make it drier. He's thinking that he might sell it to his cousin to build a house on. Because you live downstream from him, you are worried, because you know that "the wet area" was part of the floodplain for the stream. Based on what you know about streams and floodplains, what is likely to happen to the stream near your property now that he filled in his floodplain area? 5. The city has been growing in recent years and so land that once was farmland is now paved for a parking lot for Walmart. Without a storm water management plan, how would the rate of runoff to streams change as a result of the increase in impervious area (parking lot and roof tops)? (p. 1 of 2) Decrease Stay the same Increase

Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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Answer the following questions to the best of your ability
2. If the velocity of the stream is increased as a result of the change in cross sectional area, what are the likely
changes in erosion to occur to the stream down hill from your construction job?
Just as likely
Less likely
More likely
3. In this next situation, you work for the county and you are planning a bridge for this arid braided stream.
The county council says that "...a bridge this long [going across the width of stream] will be too
expensive...", so you have been given the job of making the width of the stream smaller. You have learned
about streams and know that if you decrease the width, then the velocity will increase under the bridge,
possibly destablilizing the bridge abutments. They tell you to "figure out how to make it work within
budget". What would you change and why?
S
4. You live near a stream and your uphill neighbor didn't like the wet area near the stream and brought in fill to
raise it up and make it drier. He's thinking that he might sell it to his cousin to build a house on. Because
you live downstream from him, you are worried, because you know that "the wet area" was part of the
floodplain for the stream. Based on what you know about streams and floodplains, what is likely to
happen to the stream near your property now that he filled in his floodplain area?
5. The city has been growing in recent years and so land that once was farmland is now paved for a parking lot
for Walmart. Without a storm water management plan, how would the rate of runoff to streams change
as a result of the increase in impervious area (parking lot and roof tops)?
(p. 1 of 2)
Decrease
Stay the same
Increase
Transcribed Image Text:2. If the velocity of the stream is increased as a result of the change in cross sectional area, what are the likely changes in erosion to occur to the stream down hill from your construction job? Just as likely Less likely More likely 3. In this next situation, you work for the county and you are planning a bridge for this arid braided stream. The county council says that "...a bridge this long [going across the width of stream] will be too expensive...", so you have been given the job of making the width of the stream smaller. You have learned about streams and know that if you decrease the width, then the velocity will increase under the bridge, possibly destablilizing the bridge abutments. They tell you to "figure out how to make it work within budget". What would you change and why? S 4. You live near a stream and your uphill neighbor didn't like the wet area near the stream and brought in fill to raise it up and make it drier. He's thinking that he might sell it to his cousin to build a house on. Because you live downstream from him, you are worried, because you know that "the wet area" was part of the floodplain for the stream. Based on what you know about streams and floodplains, what is likely to happen to the stream near your property now that he filled in his floodplain area? 5. The city has been growing in recent years and so land that once was farmland is now paved for a parking lot for Walmart. Without a storm water management plan, how would the rate of runoff to streams change as a result of the increase in impervious area (parking lot and roof tops)? (p. 1 of 2) Decrease Stay the same Increase
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