Skip to content

RAINFALL

Rain gauge is the instrument used to measure the amount of rainfall in a day. It should be made of impermeable material which can’t absorb water.

How It’s Used/Works

  • It’s taken to an open space to prevent water from dropping into the funnel.
  • Its sunk into the ground to prevent evaporation
  • The funnel top is left 30cm above the ground to prevent splashes of water and run off.
  • After 24 hours water is emptied into the measuring cylinder.
  • The reading of the amount of rainfall is got from the measuring cylinder in millimetres.
  • The figure represents the millimetres of water falling on each square millimetre of the ground.
  • It could be used to measure snow fall by melting it before the readings are gotten.
See also  ATMOSPHERIC PRESSURE

 

Calculating Rainfall

  1. Monthly Rainfall Total

-Sum of rainfall recorded in a month.

  1. Annual Rainfall Total

– Sum of monthly rainfall totals for 12 months.

  1. Mean Monthly Rainfall

-Sum of rainfall totals for a particular month over several years divided by the number of the years of observation.

  1. Mean Annual Rainfall

-Sum of mean monthly rainfall for 12 months of the year.

 

See also

BUSH FALLOWING IN WEST AFRICA

See also  RUNNING WATER (RIVER)

MINING

MINERALS IN EAST AFRICA

PROBLEMS ENCOUNTERED IN FIELD WORK

MINERALS AND ROCKS

SUBSCRIBE BELOW FOR A GIVEAWAY

Building & maintaining an elearning portal is very expensive, that is why you see other eLearning websites charge fees. Help to keep this learning portal free by donating or supporting us. We accept grants, sponsorships & support to help reach out to more people. Thank you so much. Click here to donate

Leave a Reply

Your email address will not be published.

School Portal NG
error: Content is protected !!