Quiz 5a

Excess sediment may result in which of the following channel patterns? Question options: meandering stream V-shaped valleys braided stream straight, steep-walled channels

braided stream

Faulted and jointed landscapes directs streams courses in patterns of right-angle turns forming this drainage pattern. Question options: rectangular trellis radial dendritic

rectangular

Of the world's largest rivers, which has the greatest discharge? Question options: Zaire (Congo) River Chang Chiang (Yangtze) of Asia Missouri-Ohio-Mississippi river system Amazon River

Amazon River

If the load exceeds a stream's capacity, sediment accumulates in the bed in a process called Question options: saltation. downcutting. aggradation. degradation.

aggradation.

This drainage pattern is associated with steep slopes. Question options: deranged trellis dendritic parallel

parallel

A central peak,such as a volcanic mountain, generally produces a ________ drainage pattern. Question options: trellis annular parallel radial

radial

The area of land from which all water in it drains into the same place is known as a(n) Question options: drainage divide. fluvial units. interfluve. watershed (drainage basin).

watershed (drainage basin).

A meandering stream is one that is Question options: a closed system in terms of energy and matter input. delicately balanced between equilibrium and erosion. completely stable. completely unstable.

delicately balanced between equilibrium and erosion.

Which of the following may act as a local base level? Question options: an interfluve the upper surface of a waterfall a lake that a river flows into a drainage divide

a lake that a river flows into

John Wesley Powell put forward the idea of base level, which refers to Question options: the amount of discharge in a particular reach of a stream. the average height of a stream channel. a level below which a stream cannot erode its valley. an evolutionary cycle of landscape development from fluvial action.

a level below which a stream cannot erode its valley.

When a dam and reservoir are constructed, the natural response of the river and its channel gradient come under the control of Question options: the government. the same base level that existed prior to construction. a local, or temporary, base level. an ultimate base level.

a local, or temporary, base level.

The degradation of a landscape by weathering, erosion, and transportation will ultimately reduce the landscape down to Question options: valley level. the mountain tops. continental shelf. base level.

base level.

The largest material that can be carried by a stream is carried as Question options: dissolved load. suspended load. flow load. bed load.

bed load.

Bed load is moved by Question options: saltation, traction, and suspension. both saltation and traction, but not suspension. traction. suspension. saltation.

both saltation and traction, but not suspension.

The total possible load a stream can transport is its ________, whereas a stream's ability to move particles of specific size is its ________. Question options: bed load; sediment load competence; capacity discharge; competence capacity; competence

capacity; competence

Which of the following is not factored when considering discharge? Question options: channel depth velocity channel length channel width

channel length

The sediment load that travels in solution is Question options: suspended load. flow load. bed load. dissolved load.

dissolved load.

Processes that are related expressly to streams and rivers are termed Question options: lemnetic. fluvial. geomorphic. lotic.

fluvial.

The suspended load of a stream consists of particles that are Question options: dragged along the stream bed. dissolved in solution. rolled and bounced along the stream bed. held aloft in the stream flow.

held aloft in the stream flow.

The science of water and its global circulation, distribution, and properties is known as Question options: lithology. geomorphology. climatology. hydrology.

hydrology.

Entrenchment of a channel occurs because Question options: a decrease in stream gradient occurs. a change in the bed load size-distribution occurs. the river flows from consolidated rock into a region composed of loose sediments. rejuvenation (erosion) occurs due to tectonic uplift. isostatic downwarping of the crust occurs.

rejuvenation (erosion) occurs due to tectonic uplift.

The ultimate base level is Question options: a dam. dependent on the geological substrate. a drainage divide. sea level.

sea level.

Stream transport involves all of the following except Question options: bed load. sheet flow. traction. saltation.

sheet flow

Stream capture refers to Question options: the illegal withdrawal of water from a river. the merging of two streams flowing in the same valley. the process by which one channel erodes through a drainage divide (like a ridge) and captures the headwater regions of another stream. the legal process by which a state secures rights to the waters of a river basin.

the process by which one channel erodes through a drainage divide (like a ridge) and captures the headwater regions of another stream.