LOOKING AT RIVERS ON AN O.S. MAP - PowerPoint PPT Presentation

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LOOKING AT RIVERS ON AN O.S. MAP

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LOOKING AT RIVERS ON AN O.S. MAP You may be asked to describe the physical features of a river an an OS map. The following points should be referred to in your answer ... – PowerPoint PPT presentation

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Title: LOOKING AT RIVERS ON AN O.S. MAP


1
LOOKING AT RIVERS ON AN O.S. MAP
2
You may be asked to describe the physical
features of a river an an OS map. The following
points should be referred to in your answer
  • Examine the course of the river is it straight
    or meandering? Is it in the upper, middle or
    lower section?
  • What direction is the river flowing in? Are there
    any changes in direction?
  • Look at the valley shape is it V-shaped or is
    the river in its floodplain (contour lines will
    tell you). If it is a V-shaped valley the
    contour lines will be in a v-shape pointing uphill

3
  • Look at contour lines to work out the rivers
    speed eg if a river is flowing along flat ground,
    speed will be fairly slow. Look at the contour
    lines that pass underneath the river.
  • Pick out features of the river eg meanders,
    ox-bow lakes, waterfall etc quote 6-fig grid
    references.

4
  • Look at land use along the course of the river.
    How does it change? Think about farming,
    forestry, settlement, industry and lines of
    communications

5
River more than 8m wide
Floodplain
V-shaped valley
River flowing down a steep gradient
6
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