© Boardworks Ltd 2009 1 of 15 Teacher’s notes included in the Notes Page.Flash activity. These...
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Transcript of © Boardworks Ltd 2009 1 of 15 Teacher’s notes included in the Notes Page.Flash activity. These...
© Boardworks Ltd 20091 of 15
Teacher’s notes included in the Notes Page.Flash activity. These activities are not editable.
Icons key: For more detailed instructions, see the Getting Started presentation.
Accompanying worksheet. Printable activity. Useful web links.
River FieldworkFieldwork and Analysis
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How does a river change?
The photos show sites in the upper and lower course of a river.
How would the river change along its length from the
upper course to the lower?
lower
upper
What hypotheses would you choose to investigate change along a river’s course?
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The main aim and hypotheses
Main question: How does the study river change downstream?
The width of the study river increases downstream.
The depth of the study river increases downstream.
The discharge of the study river increases downstream.
The gradient of the study river decreases downstream.
Hypotheses like these could be used to investigate the main question:
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Equipment
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Showing the location of fieldwork sites
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Safety and risk assessment
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How will you collect the data?
It is a good idea to make a table to fill in with your data before you get to the fieldwork site.
Making boxes for all the data you want to collect should help you remember to gather all the information you will need whilst you are at the site.
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Data collection: field sketching
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Data collection: river width and depth
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Using data: making river cross sections
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Data collection: river speed
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To calculate discharge you need to know the cross sectional area of the river and the velocity of the water. Use this formula:
Calculating river discharge
The discharge of a river is the volume of water that flows through it in a given time. It is measured in cubic metres per second (cumecs).
discharge = area of river cross section × water velocity
Don't forget to use the correct units for the area and time. Use metres and seconds.
(cumecs) (m2) (m/s)
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Gathering data: measuring gradient
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Using data: showing gradient
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Analyse and interpret charts and graphs