Question 1
Downcutting (also known as rejuvenation) of a stream may be due to ________.
◦ uplift of land
◦ rising of sea level
◦ a decreased gradient
◦ thermal expansion
Question 2
A meandering river is flowing in a broad, alluvial valley and the river is silt-laden but also moves sand and a small amount of gravel. The government decides to build a dam across the valley for power and flood control. What will happen to the river downstream of the dam?
◦ The river will respond to the new temporary base level and cut laterally outside its valley, widening the valley.
◦ The river will start to deposit sand and gravel, frequently spilling out of its channel.
◦ The river will not change.
◦ The trapping of silt in the reservoir will change the river to a braided stream because it will only have sand and gravel in its sediment load.
Wahkeena Falls at Columbia River Gorge in Oregon in the autumn.
A male Broad-bodied Chaser
The Tennessee Valley Authority
Electrophoresis gel in a densitometer. SPE densitometry showing polyclonal gammmopathy with a broad ...
Antelope Valley poppy