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