the rivER system,,

the rivER system,,

1. 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

2. blue, to represent wATER

3. 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

4. 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

5. 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

6. 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 !!!!!!!

7. 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 :))

8. 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

9. u better know how 2 annotate

   • oxbow lakes, levees, plunge pools & waterfalls

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