Chapter 14 SmartBook

Besides sea level and rock type, the other two primary factors that influence a stream or river's profile are ___ and ___

climate, weather; tectonics

The amount of water flowing through a channel over a given amount of time is called its ______. Multiple choice question. velocity discharge drainage basin rate of flow

discharge

The area of the origin of a river is its ______, and the ______ the end of the river. Multiple choice question. headwaters; tributary is tributary; headwaters are mouth; headwaters are headwaters; mouth is

headwaters; mouth is

What is the name of the subsidiary channels that join up with the main river channel?

tributaries

The creation of mountains through ___ has a significant effect on local climate and the amount, location, and rate of runoff.

uplift, tectonics

___ is a property of a fluid that is defined as the resistance to flow.

Viscosity

The gradient of a stream will ______, and so will its erosion rates, if subsidence occurs at the ______. Multiple choice question. decrease; mouth increase; headwaters decrease; headwaters

decrease; headwaters

A(n) ___ is formed where a river meets the sea, slows down, and deposits its sediments.

delta

The total amount of sediment carried by a river is the ______. Multiple choice question. saltation load traction load sediment load suspended load

sediment load

Select the two conditions that resulted in the 1993 upper Mississippi River flood. Multiple select question. Severe precipitation was caused by warm moist air from the Gulf of Mexico and cold Arctic air merging. The ground was already saturated from early spring rains. Several dam breaches along the tributaries of the Mississippi River happened at once.

-Severe precipitation was caused by warm moist air from the Gulf of Mexico and cold Arctic air merging. -The ground was already saturated from early spring rains.

The lowest level to which a river can erode is its ______. Multiple choice question. headwaters base level bedrock sediment capacity

base level

Streams that carve directly into the rocks that compose a mountain or other area are ______ streams. Multiple choice question. tectonic bedrock cradle shield

bedrock

Suspended

clay and silt carried indefinitely above the riverbed

The ___ at the end of the Colorado River has changed dramatically in response to the cutoff water supply now used for drinking and irrigation.

delta

When rivers enters a lake or an ocean, they slow down and lose their capacity to carry sediments, forming ______. Multiple choice question. oxbow lakes deltas meanders cutbanks point bars

deltas

The direction of stream flow from higher elevations to lower elevations is referred to as the ______ direction. Multiple choice question. drop upstream proximate downstream

downstream

Some of the most beautiful, and photographed, sections along the Colorado River are the ___ meanders that first formed their curvy paths before uplift allowed them to cut down through the rocks.

entrenched

Rivers and streams ___ the landscape, carry the materials, and later deposit the sediments, thereby acting as major sculptors of Earth's surface.

erode

Cities such as Washington, D.C., and Richmond, Virginia, developed along the ___ Line because the waterfalls and flowing water provided the energy needed for mills and other mechanical facilities.

fall

A(n) ___ is an event in which the amount of water flowing through a river channel overflows its banks.

flood

The amount of discharge needed to overtop a stream's banks and spill onto the surrounding land is the ___ stage.

flood

Stream terraces not composed of bedrock are likely to have a composition similar to that of a modern ______ in the river system. Multiple choice question. delta thalweg floodplain

floodplain

Stream measurements are collected continuously and automatically at a(n) ___ station.

gauging

Catastrophic flooding often accompanies ___ like Mitch in 1998 that stalled over Central America and brought 75 inches of rain.

hurricanes

As ice sheets melt on land, they allow for the depressed land to rise back up in a process known as ______. Multiple choice question. topographic rejuvenation land rally isostatic rebound a geologic recoil

isostatic rebound

As ice sheets melt on land, they allow for the depressed land to rise back up in a process known as ______. Multiple choice question. a geologic recoil isostatic rebound land rally topographic rejuvenation

isostatic rebound Reason: Isostatic rebound changes the gradient of streams, giving them increased erosional power as the land rises farther above base level.

Meanders, floodplains, and river terraces are commonly found along ___-gradient rivers.

low

The production of ice sheets during global cooling results in ___ sea levels. These ice sheets can depress the ___, causing river drainages to flow toward the ice sheets.

lower, decreased, reduced, lowered; crust, land

Steep slopes in a(n) ___ canyon plus an unusually large thunderstorm resulted in the 1976 Big Thompson River flood near Estes Park, ___

narrow; Colorado

A depositional feature that has been built on the inside of a stream channel curve because of lower velocity is a ______. Multiple choice question. mid-channel bar point bar meander cutoff

point bar

Rafters enjoying a mountain river trip encounter both turbulent ___ and calm ___ located upstream of the turbulent areas.

rapids; pools

How is flood stage defined? Flood stage is reached when ______. Multiple choice question. the slope in the plot of the change in discharge over time is greater than one the amount of discharge needed to overtop a stream's banks and spill onto the floodplain is reached the slope in the plot of the change in discharge over time is greater than two the discharge is greater than it has been in a predefined amount of time (e.g., ten years)

the amount of discharge needed to overtop a stream's banks and spill onto the floodplain is reached

Smaller subsidiary channels that feed the main channels of rivers are ______. Multiple choice question. drainage patterns tributaries drainage systems

tributaries

Smaller subsidiary channels that feed the main channels of rivers are ______. Multiple choice question. tributaries drainage patterns drainage systems

tributaries

Select conditions that have an effect on the flow of river systems over time. Multiple select question. Dams Oil spills Geology Tectonism Runoff Climate

Dams Geology Tectonism Runoff Climate

___ meanders begin as meanders on a floodplain; either the base level drops or a tectonic event causes uplift, followed by more incision, which further deepens the meanders.

Entrenched, Incised

What is this feature? Multiple choice question. A yazoo stream A point bar A flood plain A river terrace

A river terrace

Dissolved

Chemically soluble ions transported by the river

Radial Drainage Pattern

Drainage is found on symmetrical mountains such as volcanoes

Rivers are dynamic systems driven by precipitation and ___.

gravity

Rainwater creates ___ erosion as it hits the ground.

splash

Runoff

Increase flow, causing flooding

Geology

Streams erode soft rocks more easily than hard rocks

What is a flood? Multiple choice question. Erosion exceeds deposition along the river channel bed. Precipitation exceeds infiltration for a single event. Water overflows a stream's channel.

Water overflows a stream's channel.

Vegetation

Plants stabilize stream bank and protect against erosion

Rank in order from the beginning (at the top) the processes necessary to create entrenched meanders - A meandering river flows across a floodplain - A tectonic event causes an uplift, causing the river to erode downward -Further incision by the river creates more entrenchment

(1) A meandering river flows across a floodplain (2) A tectonic event causes an uplift, causing the river to erode downward (3) Further incision by the river creates more entrenchment

A 10-year flood event, or one that has a 1/10 chance of occurring during any given year on this river, would have a discharge of approximately ______ m3/s. Multiple choice question. 1,200 2,000 400 275

1,200

What is the probability that a flow event will reach 800 m3/s in any given year on this stream? Multiple choice question. 80% Can't deduce from the information on the chart 0% 100% 20%

20%

What is a drainage divide? Multiple choice question. A ridge or strip of high ground separating one drainage basin from another The total area drained by a stream and its tributaries The area where a stream flows into a lake or ocean The arrangement of a stream and its tributaries

A ridge or strip of high ground separating one drainage basin from another

These are formed when a steep drainage enters a broad valley and the sediments and debris are deposited. Multiple choice question. Alluvial fans Rapids Lakes Waterfalls

Alluvial fans

Which of the following is the correct relationship between river velocity and sediment load? Multiple choice question. As velocity increases, the amount of sediment carried by the river decreases. There is no definite relationship between velocity and sediment load. As velocity increases, so does the river's capacity to carry a larger load.

As velocity increases, so does the river's capacity to carry a larger load.

Tectonism

Can increase the slope and supply of coarse sediments

What is stream abrasion? Multiple choice question. A stream getting wider over time due to erosion The movement of the largest particles on the riverbed during times of high flow Large grains collide with other grains in a stream and break them into smaller pieces

Large grains collide with other grains in a stream and break them into smaller pieces

Select all the natural causes for flooding from the list below. Multiple select question. Hydroelectric dam failure Local heavy precipitation Dense urbanization Regional precipitation Eruption of snow-covered volcano Snowmelt

Local heavy precipitation Regional precipitation Eruption of snow-covered volcano Snowmelt

What is the reason cities developed along the Fall Line in the U.S. East Coast region? Multiple choice question. The Fall Line creates waterfalls that provided energy to power mills. The Fall Line marks rich sources of coal. Early settlers physically were not able to surmount the high elevations marked by the Fall Line.

The Fall Line creates waterfalls that provided energy to power mills.

If a relatively young (geologically speaking) stream has a smooth, concave-upward shape, what type of rocks/sediment is it most likely flowing over? Multiple choice question. Unconsolidated sediment and/or easily eroded rocks Structurally controlled rocks that are resistant to erosion Alternating zones of easily eroded rocks and harder, more resistant rocks

Unconsolidated sediment and/or easily eroded rocks Reason: Given enough time and stable tectonics, stream profiles will end up smooth and concave-up despite the makeup of the underlying rocks. However, conditions rarely remain stable long enough for this to occur over the hardest rocks.

Select the human-caused flooding events from the list of flood causes below. Multiple select question. Regional precipitation Snowmelt Urbanization Local heavy precipitation Dam failure Volcanic eruption

Urbanization Dam failure

A(n) ___ is a broad strip of land on either side of a stream channel that is covered by water during a flood and replenished by sedimentation.

floodplain

When a stream is in a steady state in which the balance between the supply of sediment and the amount of sediment that the river can carry is in a near equilibrium, the river is referred to as a ___ stream.

graded

What is the word used to describe the change in elevation for a given stream or river over a horizontal distance?

gradient

What is the name of the subsidiary channels that join up with the main river channel? ___

tributaries

At a flow velocity of 12 cm/sec, which of the following statements are true? Multiple select question. Most sand sizes are transported as bedload. Silt is transported as bedload. Gravel is transported as bedload Clay is transported as suspended sediment.

-Most sand sizes are transported as bedload. -Clay is transported as suspended sediment.

Which of the following are ways in which tectonism, such as an uplift of a mountain, can affect drainage? Multiple select question. The uplift can increase the supply of coarse sediment. The uplift can cause a rain shadow on the other side, causing a decrease in the runoff into the drainage. The uplift can increase the slope of the drainage. The uplift can increase precipitation into the drainage. The uplift can decrease the gradient of the drainage.

-The uplift can increase the supply of coarse sediment. -The uplift can cause a rain shadow on the other side, causing a decrease in the runoff into the drainage. -The uplift can increase the slope of the drainage. -The uplift can increase precipitation into the drainage.

In what ways do streams impact people's lives? Multiple select question. They are used as transportation routes. They are the top source of atmospheric carbon dioxide, a greenhouse gas. They allow for the generation of energy without the release of carbon dioxide. They provide floodplains with nutrients required by plants and crops.

-They are used as transportation routes. -They allow for the generation of energy without the release of carbon dioxide. -They provide floodplains with nutrients required by plants and crops.

Select the conditions that caused the 1976 Big Thompson River flood near Estes Park, Colorado. Multiple select question. Heavily developed banks along the river Failed earthen dam upstream Unusually severe thunderstorm Steep slopes of the river canyon Narrow canyon

-Unusually severe thunderstorm -Steep slopes of the river canyon -Narrow canyon

The peaks flows of the Colorado River at Lee's Ferry are generally below ______ m3/s. Multiple choice question. 2,800 3,700 8,500

3,700

The peaks flows of the Colorado River at Lee's Ferry are generally below ______ m3/s. Multiple choice question. 3,700 8,500 2,800

3,700

What is a steep slope separating a floodplain from terraces above it called? Multiple choice question. A channel A bluff A bank A divider

A bluff

What is a floodplain? Multiple choice question. A broad strip of land built up by sedimentation on either side of a stream channel and covered with water during a flood Steplike landforms found above a stream A body of sediment deposited at the mouth of a stream when the stream's velocity decreases A ridge of sediment, usually sand or gravel, deposited in the middle or along the banks of a stream

A broad strip of land built up by sedimentation on either side of a stream channel and covered with water during a flood

Dam

Changes the base level because of sediment buildup

______ are formed as rivers slow down when they reach their mouth and empty into an ocean. Multiple choice question. Deltas Point bars Oxbow lakes Meanders

Deltas

What is the term for small, shifting channels that carry water away from the main river channel and distribute it over the surface of the delta? Multiple choice question. Alluvial fans Braided streams Floodplains Distributaries

Distributaries

What is the name for the two areas highlighted in this image? Multiple choice question. Drainage basins Hydrographs Drainage divides

Drainage basins

Structurally Controlled Pattern

Drainage occurs on eroded layers or structures and then cuts across a ridge to follow a different weak layer

Which of the following summaries best describes how flooding by streams impacts humans? Multiple choice question. Floods have both negative and positive aspects as they cause destruction and yet also provide floodplains with sediments and nutrients. Floods have a completely positive impact on people as they create flat land suitable for farming. Floods are completely negative in human terms considering the damage caused.

Floods have both negative and positive aspects as they cause destruction and yet also provide floodplains with sediments and nutrients.

Bed

Material carried on the bottom of a river by pushing, bouncing, rolling, and sliding; usually sand and gravel

What does a hydrologic gauging station do? Multiple choice question. Tries to prevent flooding by piping water to water catchment areas Cools or warms the water in an effort to adjust the amount of dissolved oxygen in the stream Tries to prevent flooding by compacting water in specialized pipes Measures and records real-time data about a stream's flow

Measures and records real-time data about a stream's flow

How can the melting of an ice sheet or glacier affect a river's drainage? Multiple select question. Melting of the ice releases tremendous amounts of water and sediment that lead to new or larger channels. Uplift of the land after the glacier melts can change drainage patterns and direction. Melting of the ice releases a lot of water but very little sediment.

Melting of the ice releases tremendous amounts of water and sediment that lead to new or larger channels. Uplift of the land after the glacier melts can change drainage patterns and direction.

During the 1993 upper ___ River flood, floodwaters flowed onto the floodplain because levees did not hold the water back. It took months for the floodplains to dry out because the ___ trapped the water, preventing it from flowing back into the river channel.

Mississippi; levees

Rapid

Occurs along a river and is characterized by turbulent water

Waterfall

Occurs when a stream or river's gradient is so steep that water goes over a ledge or cliff

Pool

Occurs when water slows down and pile up upstream of a rapid

Lake

Occurs where water is impounded by some obstruction

How does rainwater cause erosion on the ground? Multiple choice question. Rain causes headwater erosion into the ground. Rain causes splash erosion as the drop hits the ground and flows over it, causing sheet erosion. Rain absorbs the kinetic energy of the ground and converts it to potential energy. Rain causes the atoms it hits to become unstable, and this starts radioactive decay.

Rain causes splash erosion as the drop hits the ground and flows over it, causing sheet erosion.

Which of the following are considered to be special causes for severe flooding events? Multiple select question. Stalled hurricane Prolonged drought followed by intense precipitation Oil spills and oily tides Rainfall coinciding with snowmelt and ice dams in a river Failure of a dam

Stalled hurricane Prolonged drought followed by intense precipitation Rainfall coinciding with snowmelt and ice dams in a river Failure of a dam

What are bedrock streams? Multiple choice question. Streams that are cutting into the bedrock of the area Streams that are lined with rocks on the bottom The stream within a drainage basin that is most important to the local ecosystem The oldest streams within the drainage basin

Streams that are cutting into the bedrock of the area

Select consequences to a river when a dam is constructed. Multiple select question. The dam creates a temporary base level for the river. A reservoir is created, providing new and better habitats. The dam causes the river to deposit its sediment load upstream of the dam. Water released from the dam is clear (no sediment) and has a new capacity to erode and transport sediments downstream.

The dam creates a temporary base level for the river. The dam causes the river to deposit its sediment load upstream of the dam. Water released from the dam is clear (no sediment) and has a new capacity to erode and transport sediments downstream.

If tectonic uplift occurs in the headlands portion of a river, what will likely happen to the rates of erosion there? Multiple choice question. The rates of erosion will decrease. The rates of erosion will remain roughly steady. The rates of erosion will increase.

The rates of erosion will increase.

Isostatic rebound can change the slope of the rivers and streams flowing over the land. What is isostatic rebound? Multiple choice question. The intrusion of magma below a stream that forces the land to rise The depression of the land that occurs as water starts to flow over it The uplift of land that occurs after the weight of an overlying mass is removed The vertical lifting force that occurs as water flows over sediment along the bottom of a stream

The uplift of land that occurs after the weight of an overlying mass is removed

Which of the following describe the headwaters of mountains streams? Multiple select question. They have turbulent flow. They have the ability to carry large boulders, They have steep gradients. They have the ability to carry small particles only. Water flow is slow and laminar.

They have turbulent flow. They have the ability to carry large boulders, They have steep gradients.

Dendritic Drainage Pattern

Treelike pattern develops on rocks with similar resistance to erosion

A decrease in the size of sediments carried by a river usually reflects ______ in the gradient of the river. Multiple choice question. an increase a decrease no change

a decrease

The type of feature that forms when a steep, narrow drainage enters a broader, more gentle valley and a stream deposits the large sediments it is carrying is a(n) ___ ___.

alluvial fan

Stream terraces are composed of either _______ or ______. Multiple select question. fine windblown sediment derived from volcanic ash that clumped together after landing in a river an erosional surface cut into bedrock marine sediments derived from the last high stand of the ocean stream-derived sediment composing former floodplains

an erosional surface cut into bedrock stream-derived sediment composing former floodplains

The peak discharge of the Colorado River at Lee's Ferry is 8,500 m3/sec; this estimate was taken from ______ Multiple choice question. modern automated measurements ancient flood deposits actual measurements in the 1880s inferred levels from oral histories

ancient flood deposits

The process of meander formation begins when a difference in roughness on the ______ causes water to move faster on one side of the channel than on the other. Multiple choice question. bottom top

bottom

A(n) ___ stream flows in a network of many interconnected rivulets around numerous bars.

braided

Flat-bottomed valleys between mountains would be good places to look for ______ rivers or streams. Multiple choice question. meandering braided

braided

The feature formed when a river deposits its sediment near its mouth is a(n) ______. Multiple choice question. delta point bar meander oxbow lake

delta

The numerous small channels that run over this delta in multiple directions are called ___.

distributaries

A ridge or strip of high ground that separates one drainage basin from another is a drainage ___.

divide

Viscosity is the resistance to ___ exhibited by fluids.

flow, movement, motion

The driving force behind a river's flow is ______. Multiple choice question. its sediment load its velocity gravity the shape of the riverbed

gravity

___ is the force behind a river's flow from high to low elevations.

gravity

The two primary forces that drive a river system are ______ and ______. Multiple select question. gravity tributaries sediment size channel depth precipitation sediment load

gravity precipitation

In flowing water, the upstream side of an obstruction is subjected to the ______ of abrasion. Multiple choice question. greatest amount least amount absence

greatest amount

Mountain streams have steep gradients so they tend to ______. Multiple choice question. carry only small particles incise into the underlying bedrock move side to side with lateral erosion

incise into the underlying bedrock

As water velocity in a stream increases, turbulence increases, resulting in a(n) ______ in the water's ability to erode and transport sediment within a channel. Multiple choice question. decrease increase

increase

The base level of a river is the ___ elevation to which the river can erode

lowest, minimum

Braided rivers carry more volume and larger size ranges of sediment types than ___ rivers.

meandering

Stream channels rarely stay straight and quickly develop ___ due to differences in roughness on the channel bottom.

meanders

The size of sediments in braided rivers typically is ______ than that carried by meandering rivers. Multiple choice question. more varied less varied

more varied

What type of lake is created when a cutoff meander becomes isolated? The answer is just one word.

oxbow

When meander scars are filled with water, they are ______. Multiple choice question. oxbow lakes point bars river terraces main channels floodplains

oxbow lakes

A(n) ___ stream or river is one that flows year-round, whereas a(n) ___ stream does not flow the entire year.

perennial; ephemeral, intermittent

A delta is formed where a river meets a ocean because ___ is deposited as the river loses speed.

sediment, sand, load

Construction of dams causes an interruption of river flow. River ___ are deposited upstream of the dam, shortening the life of the reservoir.

sediments

River ___ are relatively flat benches that are perched above a river or stream and that stair-step upward and outward from the active channel.

terraces

Sinuosity refers to ______. Multiple choice question. the profile of a river or stream in a given length the amount of water passing a point in a river or stream in a given length the amount that a river or stream channel curves in a given length the steepness of a river or stream in a given length

the amount that a river or stream channel curves in a given length

Which of the following locations would be the two most common areas in which to find a braided stream or river? Multiple select question. Broad, sloping plains that flank mountain ranges Topographically flat areas such as the Great Plains Flat-bottomed valleys between mountains

-Broad, sloping plains that flank mountain ranges -Flat-bottomed valleys between mountains

What is a steep slope separating a floodplain from terraces above it called? Multiple choice question. A bank A channel A bluff A divider

A bluff

What is a point bar? Multiple choice question. A flowing network of interconnected rivulets around numerous bars A new, shorter channel across the narrow neck of a meander A sandbar deposited along the inside of a stream meander due to lower velocity A crescent-shaped meander cutoff

A sandbar deposited along the inside of a stream meander due to lower velocity

What is a braided stream? Multiple choice question. A stream and its tributaries that form a pattern resembling a tree A stream that exhibits a delicate balance between its transporting capacity and the sediment load available to it A stream with pronounced sinuous curves A stream that flows in a network of many interconnected rivulets around numerous bars

A stream that flows in a network of many interconnected rivulets around numerous bars

___ drainage patterns are associated with areas where the rocks have the same resistance to erosion, whereas ___ drainage patterns are found on symmetrical mountains.

Dendritic; radial

What does downstream mean? Multiple choice question. It is the direction of flow in which the water is moving. It is the deepest part of a stream channel in any particular section. It is the direction upslope in a stream that water is running down. It refers to any stream that is cutting into bedrock.

It is the direction of flow in which the water is moving.

Select common features located along low-gradient rivers. Multiple select question. River terraces Floodplains Waterfalls Steep drainages Meanders Single channels

River terraces Floodplains Meanders Single channels

Which of the following are primary factors that influence a stream's profile? Multiple select question. Sea level Climate Water temperature Rock type Tectonics

Sea level Climate Rock type Tectonics

At a flow velocity of 100 cm/sec, which of the following statements is true regarding sand-sized sediment? Multiple choice question. All sand-sized particles are transported as bedload. All sand-sized particles are transported as suspended sediment. The majority of sand-sized particles are deposited, but the smallest sands are transported as bedload. Smaller sand grains are transported as suspended sediment, and larger grains are transported as bedload.

Smaller sand grains are transported as suspended sediment, and larger grains are transported as bedload.

When conditions such as climate remain stable, a river may approach a dynamic equilibrium state. The river would then be considered ______. Multiple choice question. a progressive stream a graded stream a tributary

a graded stream

An oxbow lake is an isolated, curved lake formed when ______. Multiple choice question. a stream erodes sideways a meander is cut off from a stream a stream floods erosion deepens a stream bed

a meander is cut off from a stream

The gradient of a stream or river is defined as the change in ___ for a given horizontal distance.

elevation, height

The discharge of a river is measured in cubic ___ per second.

feet

Erosion and deposition by ___ are the principal processes that sculpt Earth's landscape.

rivers or streams

Meander ___ are left behind by meandering rivers as exposed curved ridges, lines of vegetation, or as curved, dry depressions. When the depressions are filled with water, they are ___ lakes.

scars; oxbow

The amount that a river or stream channel curves in a given length is called its

sinuosity

The turbulence of water increases as the water's ______ increases, which can increase the water's ability to erode and transport materials within the channel. Multiple choice question. solubility concentration velocity traction

velocity

Streams ______ tend to be confined to a single channel rather than being braided. Multiple choice question. that carry a lot of sediment with gentle slopes composed of glacial meltwaters

with gentle slopes

In a river system, the riser or bluff is ______. Multiple choice question. the portion of a stream above a waterfall or dam the slope leading up to the top of a natural levee from the floodplain side a steep slope separating a modern floodplain from adjacent terraces the slope leading up to the top of a natural levee on the stream side

a steep slope separating a modern floodplain from adjacent terraces

The gradient of the stream changes between steep and gentle in response to the ______. Multiple choice question. different colors of the rocks alternating weak and strong rocks varying thickness of the rocks

alternating weak and strong rocks

A drainage ___ is an area in which all drainages merge into a single stream or move to a single body of water.

basin

Rivers on gentle plains usually occupy a single ______ rather than being braided. Multiple choice question. oxbow meander channel

channel

When the amount of sediment exceeds the ability of the current to carry it, the stream ___ the sediment.

deposits

A stream or river that flows all year is ______. Multiple choice question. ephemeral a tributary perennial

perennial

Where do deltas form? Multiple choice question. Downstream of dams in channelized sections of a stream Right below a nickpoint in a braided river system Right above a nickpoint in a meandering river system At the mouth of a river that empties into the ocean

At the mouth of a river that empties into the ocean

What happens to the erosive power of a river as velocity increases? Multiple choice question. Erosion decreases. Erosion increases. Erosion is not related to velocity.

Erosion increases

When is sediment most likely to be deposited? When the ______. Multiple choice question. grains have a surface area to volume ratio above 2:1 current velocity increases again after a brief slowdown sediment supply exceeds a stream's capacity to transport it tributaries reach the next order of stream in the drainage basin

sediment supply exceeds a stream's capacity to transport it