EXERCISE 1 DATA SHEET 1. What type of river is at location A, and how can you te
ID: 117706 • Letter: E
Question
EXERCISE 1 DATA SHEET
1. What type of river is at location A, and how can you tell?
many loops in the landscape are formed and eventually these loops cut off the river, forming lake-type bodies of water adjacent to the main river
2. Discuss briefly the processes of erosion and deposition that are occurring in the area around Location A.
3. Is there any evidence of these processes operating in the past along this portion of the Snake River? If so, describe the evidence. If not, describe the evidence you would have expected to see but did not.
4. What type of river is at Location B?
5. How is the Colorado River at Location B similar to the Snake River at Location A? How is it different?
6. What type of river is shown at Location C?
7. What type of river is shown at Location D?
8. How is the river at Location D similar and/or different to the Congo River at Location C?
9. What is the name of the fluvial landform at Location E?
10. In the past, the Mississippi Delta was located at many different positions in the Gulf of Mexico. Knowing this, explain the possible origin of the Mississippi Canyon to the southwest of Location F.
11. What is the feature at Location G called?
12. What is the elevation loss from the top to the bottom of the profile in meters? What is the average slope?
13. What is the elevation of the point “Zone of Erosion”? (Hint: It will be listed at the bottom of the window to the right of the text labeled “elev.”)
14. What is the map length of the line you drew from the “Zone of Erosion” to the “Fan Elevation Profile”?
15. What is the ground length of the line in question 14? What do you think causes the difference between the map length and the ground length measurements?
16. What feature is shown at Location H?
https://www.google.com/earth/
https://www.esciencelabs.com/sites/default/files/Geology/Google_Earth_Files/Lab10_Fluvial_Processes_and_Landforms/Lab10_Fluvial_Landforms.kmz
Explanation / Answer
1. The river is a Meandering River. The loops are formed when the volume of water is very high and the velocity is low. The lakes which are cut off from the river are known as Ox bow lakes.
2. The erosion in the meandering rivers occur in the outer edge of the river whereas the sedimentation occurs in the inner edge of the river. The erosion occurs when the river water hits the outer edge as the river tends to travel straight, the eroded sediments are deposited in the inner edge as the water loses its potential to carry sediments as the velocity is low.
3. Yes, these processes have operated in the past, the evidence is the Ox bow lake
4. This part of the colorado river is an Entrenched river
5. Like the snake river, the colorado river is a meandering river. The major difference is that colorado river does not have any ox bow lakes. This is because, the cliffs of the grand canyon are strong for side cutting, hence the river down cuts and hence it is very deep.
6. The river shown in this location is a Braided River
7. The river shown in Location D is also a Braided river
8.The Congo river and the Rakaia river are both braided river. But the amount of sediments differ drastically, this is because the Raikia river is of short course from the vountains to the sea, hence the sediments form the mountains are deposited in this small area, whereas congo river is one of the largest rivers, hence the sediments are deposited in a large area
9.The fluvial landform in this river is the Delta
10. The Missisipi canyon is formed when the river deposits sediments in the gulf when the delta is at a particular place, when the delta gets shifted, so does the turbidites. hence a thick and a long pile of sediments is formed.
11. The feature marked in this location is an Alluvial fan.
12. The elevation loss in this profile is 187 meters. The average slope is -8.9%
13. The elevation of this point is 11632 feet.
14. The map length between these two points is 4.45 miles
15. The ground length is 1.56 miles, the difference is caused due the map length is a straight line wheras the ground length considers the actual bends and curves.
16. The feature shown here is also an Alluvial fan
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