Test #3 Ch. 14

Braided streams are characterized by

-sediment deposition in the channel resulting in the formation of sand and gravel bars and numerous small channels -a heavy load in relation to discharge

of the world's largest rivers, which has the greatest discharge?

Amazon river

___________ separate drainage basins and send flows to the Pacific, the Gulf of Mexico, the Atlantic, Hudson Bay, or the Arctic ocean.

Continental drift

since the Amazon River is the larges river in terms of discharge, it also produces a large delta at its mouth

False.

although Nile River is the longest river on Earth, it is not the largest river in terms of discharge.

True

cfs is a unit of stream discharge and stands for cubic feet per second

True

most streams flow into the ocean

True

stream discharge is calculated by multiplying the velocity of the stream by its width and depth for a specific cross section of the channel

True

as the discharge of a stream increases, which of the following also happens?

Width, depth, and velocity all increase

a cutoff on meandering stream results in the formation of

an oxbow lake

as a stream velocity decreases, which of the following sizes of sediments will be deposited last?

clay

the effect of urbanization on a typical stream hydrograph is to

decrease lag time between storm peak and peak stream discharge

which of the following stream channel types is likely to develop on gently slopping surfaces composed of rocks or sediments with approximately the same resistance to erosion?

dendritic

the glacial shield regions of Canada have disrupted surface drainage patterns that are called ____ patterns.

deranged

watershed are defined by

drainage divides

some streams may originate in a humid region and subsequently flow through an arid region. Thus, the discharge may decrease with distance, because of high potential evaportransipiration. such streams are called _____ streams

exotic

Stream flows always increase discharge downstream because the area being drained increases

false(not always)

Rectangular drainage patterns form primarily as a result of ___

flow through faulted landscape

the suspended load of a stream consists of particles that are

held aloft in the stream flow

a graph of stream discharge over time for a specific place is called

hydrograph

the two driving forces of fluvial systems are ______ and ______

insolation and gravity

some streams do not reach the ocean. water leaves the basin through evaporation or subsurface gravitational flow. such basins are called __________ basins

internal drainage

which of the following is true of the longitudinal profile of most rivers?

it is concave in shape

which of the following unit is a correct unit for stream discharge?

m3/s

the length of the individual channels in a dendritic drainage pattern is _____ and this increases energy _______

minimized; efficiency

an interruption in a stream's longitudinal profile of equilibrium is called ________

nick-oint

steep slopes and some relief generally produce which drainage pattern?

parallel

a central peak, such as volcanic mountain, generally produces a ____ drainage pattern.

radial

drainage density refers to

ratio of the total length of channels to the area of the basin

stream transport involves all of the following except

sheet flow

the relationship between stage and steam discharge is called _________ curve

stage-discharge rating

which of the following does not favor delta formation?

strong ocean currents

which of the following will favor stream terrace formation?

tectonic uplift of the headwaters

the valley and ridge province is characterized by which drainage pattern?

trellis

which drainage pattern is produced by folded topography?

trellis

a watershed is an open system

true