5 Written Questions
5 Matching Questions
- on the outer parts of the meander loops or bends
- upstream tributaries tend to have higher competencies than the major river
- a where is erosion concentrated along a meandering stream? at the unconsolidated point bars? on the inner banks of the meander loops? on the outer parts of the meander loops or bends? on the straight channel segments that connect the meander loops?
- b t/f for the same discharge, gradient and channel cross section, a stream with a boulder-strewn bed would be MORE turbulent than one with a sandy bed.
- c Which of the following is true concerning a major river system? discharge decreases below junctions with perennial tributaries? upstream tributaries generally have lower gradients than the major river? channel bed roughness and erosive force generally increase downstream? upstream tributaries tend to have higher competencies than the major river?
- d this describes the particle transport mode in streams intermediate between suspension and rolling along the bottom. the result is particle "hopping" along the bottom of a stream. alluviation? leaping? saltation? creeping?
- e most precipitation originates from which of the following? transpiration? sublimation? evaporation? infiltration?
5 Multiple Choice Questions
- how does urbanization affect runoff and infiltration in a small, previously forested, drainage basin? both decrease? both increase? runoff decreases; infiltration increases? infiltration decreases; runoff increases?
- A dam and reservoir are constructed on a graded river. What will happen? channel downcutting upstream and downstream from the dam? deposition upstream and downstream from the dam? deposition downstream from the dam? deposition upstream from the dam?
- This describes the total sediment load transported by a stream. velocity? capacity? competence? discharge?
- t/f a stream's COMPETENCE reflects the size of the largest particle a stream can move
- This is not part of the hydrologic cycle.
water evaporating from a like? water infiltrating into soil and bedrock? sodium chloride dissolving into soil water and ground water? water moving into creeks and streams following a rainstorm?
5 True/False Questions
false → t/f with the passage of time, deposition and erosion gradually SHORTEN the channel length of a meander loop
bedrock channels → Which of the following are most likely to be found at the head of a stream? bedrock channels? alluvial channels? meandering streams? braided streams?
sea level falls; land rises → gold nuggets transported in a stream in CA is an example of the streams: bed load? suspended load? particle load? dissolved load?
the gradient is lowered as the channel lengthens and migrates away from the cut or outer banks of the loop → in the absence of cutoff, how does a river meander loop behave over time? the gradient is raised as the loop lengthens, and the channel migrates toward the cut or inner bank of the loop? the gradient is raised as the loops shortens, and the channels migrates away from the cut or outer bank of the loop? the gradient is lowered as the channel lengthens and migrates away from the cut or outer banks of the loop? the gradient is lowered as the loop shortens, and the channel migrates toward the cut or inner bank of the loop
silt and clay-sized, detrital grains → these are characteristics of downcutting streams and a youthful stage of valley evolution due to steep gradients. wide flood plains? rapids and lows of white water? U shaped cross valley profiles? meandering channels and natural levees?