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WorksheetsChapter 14: River Systems Quiz
Total questions: 20
Worksheet time: 15mins
The area of land from which all water in it drains into the same place is known as a(n)
interfluve.
watershed.
drainage divide.
fluvial unit.
The general term for channelized water flow, regardless of size, is
river.
gully.
stream.
rill.
________ streams flow year-round, fed by snowmelt, rainfall, groundwater, or a combination thereof.
Perennial
Intermittent
Ephemeral
Permanent
As the discharge of a stream increases, which of the following also happens?
Stream channels narrow, become shallower, and lose velocity.
The rate of flow decreases.
Width, depth, and/or velocity increase.
Erosion and sediment transport are greatly reduced.
In a given section of channel, the greatest flow velocities are usually
near the surface, near the center.
along the shallowest portions of the stream.
along either bank.
near the bottom of the stream channel.
In most river basins in humid regions, discharge is highest
upstream.
downstream.
midstream.
at the headwaters.
Erosion performed by flowing water alone is known as
sheetflow.
saltation.
weathering.
hydraulic action.
Erosion in which boulders and gravel moving along the channel break apart and as rocks and sediment grind and carve streambeds is known as
sheetflow.
saltation.
weathering.
abrasion.
Which of the following lists of processes are in the correct sequence as to their occurrence in nature?
deposition, erosion, transport, weathering
weathering, erosion, deposition, transport
weathering, erosion, transport, deposition
transport, deposition, erosion, weathering
Stream transport involves all of the following except
saltation.
bed load.
sheetflow.
suspended load.
The sediment load consisting of fine-grained clastic particles held aloft in the stream is the
bed load.
suspended load.
dissolved load.
saltation.
The drop in stream elevation per unit distance is known as
discharge.
base level.
gradient.
aspect.
Base level refers to
the amount of discharge in a particular reach of a stream.
a level below which a stream cannot erode its valley.
the average height of a stream channel.
the stream gradient.
A(n) ________ is a stream which maintains an equilibrium between the processes of erosion and deposition and, therefore degradation and aggradation.
graded stream
oxbow
anabranching river
meandering stream
The process whereby streams deepen their channel is known as
headwater erosion.
channel incision.
stream piracy.
saltation.
Channels with gradual slopes often develop a sinuous form called a(n) ________ pattern.
braided stream
anabranching
meandering stream
exotic
________ is the general term for unconsolidated clay, silt, sand, gravel, and mineral fragments deposited by running water.
Alluvium
Deposition
Aggradation
Degradation
Which of the following is incorrect regarding floodplains?
They are formed by recurrent flooding in the area adjacent to the stream.
Natural levees on either side of a stream are formed during times when the stream is at flood stage and overflows the bank.
They are generally low-lying areas.
They are characterized by rapids and low waterfalls.
When a river reaches a base level, its forward velocity rapidly decelerates as it enters a larger body of standing water and a (n) ________ is formed.
alluvial terrace
delta
stream terrace
floodplain
A flood is defined as
a low water flow that stays within the natural bank along any portion of the stream.
a high water flow that passes over the natural bank along any portion of the stream.
an enclosed body of water at a river's mouth where freshwater flow encounters seawater.
the flat, low-lying area adjacent to a meandering channel and subjected to recurrent flooding.
