__________ is not a part of teh hydrologic cycle.
sodium chloride dissolving soil water and ground water
Most precipitation originates from which of the following?
_________ are components of the hydrologic cycle that release water vapor directly to the atmosphere.
evaporation and transpiration
What is true concerning a major river system?
upstream tributaries tend to have higher competencies than the major river
What was the location and cause of the 1993 flood of the Mississippi river and its tributaries?
upper basin; very heavy, sustained rainfall in the late spring and early summer
How does urbanization (paving, etc) affect runnoff and infiltration in a small, previously forested, drainage basin?
infiltration decreases; runoff increases
Give an example of something that is not a depositional figure.
A stream begins at an elevation of 200 meters and flows at a distance of 400 kilometers to the ocean. What's the average gradient?
Gold nuggets transported in a stream in California is an example of the stream's what?
________ make up the suspended loads of most rivers and streams.
Silt an clay-sized, detrital grains
_______ describes the total sediment load (maximum capacity) transported by stream.
_________ describes the particle transport mode in streams intermediate between suspension and rolling along the bottom. The result is partical "hopping" along the bottom of a stream.
What is a feature that is most likely to be found at the head of a stream?
a bedrock channels
Where is erosion concentrated along a meandering stream?
on the outer parts of the meadner loops or bends
In the absence of cutoff, how does a river meander loop behave over time?
the gradient is lowered as the channel lengthens and migrates toward the cut or outer bank of the loop
Which of the following tends to form in streams having highly variable discharge and easily erodible banks?
____ are characteristics of downcutting streams and a youthful stage of valley evolution due to steep gradients
rapids and lots of white water
A dam and reservoir are constructed on a graded river. What will happen?
deposition upstream from the dam
which of the following statements is true concerning natural levees?
mostly fine sand and silt that builds up during floods
At the head of a delta, the major channel splits into smaller channels that follow different paths to the sea. These smaller channels are known as _______.
Which of the following msut result in a lower base level for rivers and streams?
sea level falls; land rises
True/False: Alluvial fans develop at unusual locations where stream gradients abruptly increase for a short distance
True/False: With the passge fo time, deposition and erosion gradually shorten the channel length of a meander loop.
For the same discharge, gradient and channel cross section, a steram with a boulder-strewn bed would be more turbulent than one with a sandy bed
A steram's competence reflets the size of the largest particle the stream can move