GCSE Physical Geography Fieldwork

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GCSE Physical Question Investigated: Geography Fieldwork How well does the stream in Carding Mill Knowledge Organiser Valley match the Bradshaw Model? Bradshaw Model = theoretical model that shows how a river’s characteristics change as it goes downstream. If the triangle increases in size it means that variable increases the further you go down the stream e.g. the amount of water (discharge) in the stream increases as you move down the stream. If the triangle shrinks this means the opposite e.g. the size of particles in the stream gets smaller the further down the stream you go because of erosion like attrition. Evaluation • Increased understanding of National Trust river features/processes? keep area safe • Appropriate methods and UK’s largest and accessible drainage basin equipment? Expertise? • Accurate, valid and reliable conclusions from methods? Local • Where could we investigate geography next to extend the project? Systematic Sampling RISK Keywords Upper, middle lower, Bradshaw, 4 sites chosen equal distance erosion (HA, Ab, Att), deposition, ASSESS- transportation, weathering, geomorphic, apart MENT!!! bank, bed, drainage basin, bedload, width, All in UPPER COURSE depth, velocity, discharge, valley, gravity Why CMV? Bedload Each person steps into the stream, and without looking down at where you are, pick up two stones nearest to your little toes i.e. random picking Now measure the A (longest) axis on the metre stick or ruler and then look Stream gradient Stream velocity on the chart to give an (speed) index score of 1(sharp 1. Two people hold the edges) to 6 (worn down, ranging poles 10 metres We are going to time floats smooth edges) apart so the tips are just (corks) over 10m between touching the water surface. the two ranging poles. 2. Put the clinometer with its centre bump next to where Person 1 starts a float at the the red and white sections left bank by the top pole. meet on the pole. Look over Person 2 (with a stopwatch) the clinometer sights so that says “ready, go” you can ”fire” at the same 3 stands in the water and Conclusions (MEETS / place on the other pole.. shouts “stop” when it passes DIFFERS vs Bradshaw) Wait for the wheel to stop the second ranging pole and Width – INCREASED BY moving before trapping it catches the float. 0.65m with the trigger. 4 records the time. Round it Depth – INCREASED by 25cm 3. From where you can see up or down to whole Velocity – INCREASED by 15 zero on the dial, how many seconds. seconds lines above or below the zero 5 follows along the bank to Bedload – INCREASED from 4 are there? These are the gently move the float on if it to 3 number of degrees of the gets stuck in a whirlpool or Slope angle – DECREASED slope of the stream behind a stone. from -8° to -5°.

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