Slopes and Streams Fluvial landforms are all formed by stream erosion a. True b. False* Identify the erosional landform developed by streams a. Mississippi delta b. Grand Canyon* Which would you expect to have a higher sediment yeidl a. a draingage basin with shallow gradients b. a drainage basin with steeper gradients* Which of the following influences rates of erosion in the drainage base? a. amount of precipitation b. relief c. lithologies present d. human impacts e. all of these* When rivers deposit sediments along the coast, these can form a.rills b. cliffs c. deltas* d. alluvial fans A flood with a recurrence interval of 100 years means that the flood occurs every 100 years a. True b. False* Saltating sand is part of the a. bedload* b. suspended load c. dissolved load d. muddy load Water in a river with a large suspended load is more competent than a river moving large boulders a. True b. False* If the sediment supply to a river increases so much that it overwhelms the ability of the stream to carry the sediment then this will occur a. transport b. eriosion c. flooding d. aggradation* Commonly, a river is said to be graded when the longitudinal profile is _________and neither _______ or _______occurs a. unstable, transport, erosion of channel floor b. stable, transport, erosion of channel floor c. unstable, agradation, erosion of channel floor d. stable, agradation, erosion of channel floor* Which is typically the greatest amount of river sediment load? a. bed load b. suspended load* c. dissolved load Where is a stream’s load deposited? a. in the delta b. in the stream itself c. on the floodplain d. all of the above* e. none of the above Which is typically the least important form of stream erosion? a. corrosion* b. abrasion c. hydraulic action .