A natural, meandering, river channel is modified into a more or less straight and smooth,
canal-like channel. Which of the following statements is correct?
The straight channel has a higher gradient and more friction than the natural channel.
__________ are components of the hydrologic cycle that release water vapor directly to the
Evaporation and transpiration
Where is erosion concentrated along a meandering stream?
on the outer parts of the meander loops or bends
__________ describes the particle transport mode in streams intermediate between
suspension and rolling along the bottom?
Which one of the following best describes how urbanization affects small-stream
Infiltration decreases; lag time between storms and peak runoff is shortened.
A dam and reservoir are constructed on a graded river (having the 'normal' profile showed inclass). What will happen?
Deposition upstream from the dam; channel downcutting below.
After ice sheets and glaciers, __________ contains the next highest percentage of the Earth's
An artesian well is one in which __________.
water rises above the top of the aquifer without any pumping
Excessive groundwater withdrawals can cause __________.
The water table drops or declines in elevation.
For unconfined aquifers, what hydrologic factor is approximated by the slope of the water
A spring forms when
groundwater discharges from a fault connecting an artesian aquifer to the ground surface.the water table intersects the ground surface. (Both B and C are correct.)
Which one of the following applies to a valley glacier that lengthens (extends its terminus
downslope) over a period of many years?
Accumulation exceeds wastage.
__________ first developed the theory that small variations in the Earth-Sun distance were
responsible for short term, climatic oscillations (1000 to 100,000 years).
What type of moraine would be most useful for tracing diamond-bearing rock fragments
directly to their bedrock source area?
lateral and medial of an alpine glacier
Which of the following is often associated with a cirque basin in high, mountainous terrain
A stream flowing over a granite that has regular fractures would most likely exhibit a
____________ drainage pattern.
Streams receiving water directly from the saturated zone of an unconfined aquifer are
said to be
Glaciers advance in response to gravity when the amount of ice and snow accumulated is _____________ the amount melting.
As continental glaciers advanced across North America during the last ice age,
worldwide sea level
Which of the following is not needed to produce an economic accumulation of oil or
Given all other conditions are the same, ground water flows faster if ___.
it is flowing in response to a greater hydraulic gradient