Zusammenfassung der Ressource
the rivER system,,
- waterfalls,,, nice ive never rly seen one lol
- gues what. coMMon sense time
- it's a sudDEn fall of water. it's a fALL OF WATER. WATER faLL. whAt did u thiNK IT WAS
- what's not common sense is?? how it's formed :0
- river flows from resistant 2 less
resistant. ah, that makes sense!!
- so the downstream not resistant rocks = !! eroded faster !!
omg waterfall commENCE
- but w/ ths said, use the keywords GRADIEnt and dIFFERENTIAL EROSION!!!!!!!
- pLUnge pools, too !!
- ... haha water PLUNGEs against the rocks below the waterfall,
- but alas, it's not that simple . this depression is deepened &
enlarged by the HYDRAULIC ACTION of the plunging water !!
and also, the swirling of water there, causing aBRASIOn.
- there u have it! a plunge pool
- annotation coming
- okay so
undercutting
= gorge
- the overhang str8 up collapses :00
- and then the plungepool !! yaY
- blue, to represent wATER
- meanders
- bends in a river as
sinuosity increases
- usually occur in
rivers w coarser
load,,
- they lied. they said we aren't
tested on pools & riffles, but its
related so listen up
- carisse.. what r pools nd riffles
- pools r deeper parts of the river
where fine sediments like silt ! r
deposited
- riffles r shallow !! where coarser stuff like
pebbles r deposited
- um.. hoW?? u make 0 sense
- riffles slow down velocity before it picks up again!! neat
- so like,, alternating velocity, different levels of erosion = meander s!
- water tends to flow faster around the
bends on the oUTER side, more erosion!1
- then this eroded stuff slides
down, forms a river cliff ,,, the cliff
is concave shaped !! so conCAVE
BANK, outsiDE
- as for the inner banks, water is slower, more deposition!!
- deposits have this gentle slip off slope,, inner bank = convex bank
- oxbow lakes
- gdi. they should call it a horseshoe
lake. it's horseshoe shaPED
- formed after meanders!1 lateral erosion &
undercutting occur on the concave bank, deposition
on convex
- the continuous erosion / deposition make the convex and
concave bank get closer,, basically a v pronounced meander
- yEs ! the narrow neck of land is finally cut through, either
by lateral erosion of 2 concave banks or the v strong
currents of a flood
- levees
- ok so like. when it floods !! we got a problem
- but we have levees!1 niCE
- basically, levees block the water from overflowing and going where
we don't want it to go.
- they're naturally made of earth!! like the natural movement
of water pushes the sediments to the side of the river
- floodplaiNS
- are like, plains which hold the excess water
when there;s a flood!
- they hodl the excess water that gets past
the levees to prevent furTHEr flooding,,,
- okay here's some annotating for the rly small picture
- the green part is the flood plain. when the
river floods, that's where the flooded water
goes !!!!!!!
- transportation
- foUR TYPEs
- (1) SOLUTION
- minerals r dissolved in the water and carried along as a solution!!
- (2) SUSPENSIOn
- rEEaaaly fine particles are brought along in the water !!
- (3) SAltation
- small pebbles & stones bounced along the river bed !! ah cute
- (4) TRACTIOn
- hUUuuge ass boulders / rocks are
bounced bOUcned along the river bed :))
- eroSION!!!!
- FOUR TYPEs
- (1) HYDRAULIC ACTION
- the force of the river against the banks which causes air to be trapped in
the cracks. the pressure weakens the banks and gradually wears it away
- (2) ABRASION
- rocks carried along by the river wear
down the bed and banks !!
- (3) ATTRITION
- rocks being carried by the river smash
tgt and break in2 smaller particles
- (4) soLUTION
- soluble particles are dissolved into the river,,, some acidic thing
lmAO
- u better know how 2 annotate
- oxbow lakes, levees, plunge pools & waterfalls