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1.2

Minor Versionm

by Procheta Mallik

    • Exercise caution when using paper cutter

    • Be wary of sharp edges of the cut bottle

  1. Measure and mark 1 cm from the neck of  bottle. Cut the top portion of plastic bottle at the point where you made the mark.
    • Measure and mark 1 cm from the neck of bottle.

    • Cut the top portion of plastic bottle at the point where you made the mark.

  2. Identify the thin line that runs through the bottle wall. It helps as a reference line to paste the scale in a perfect orientation. Leave out the tapered portion at the base of the bottle as it will mess up the accuracy.
    • Identify the thin line that runs through the bottle wall.

    • It helps as a reference line to paste the scale in a perfect orientation.

    • Leave out the tapered portion at the base of the bottle as it will mess up the accuracy.

    • Starting above the tapered portion, peel and paste the provided scale perpendicularly along the thin line.

  3. Use enough transparent tape over the scale to make it water-proof.
    • Use enough transparent tape over the scale to make it water-proof.

  4. Fill the bottle with water to the 'zero' point. This helps to bring down the errors that occur due to the tapered portion of bottle. Your own rain gauge is now ready.
    • Fill the bottle with water to the 'zero' point.

    • This helps to bring down the errors that occur due to the tapered portion of bottle.

    • Your own rain gauge is now ready.

  5. Take your rain gauge to the rooftop and place it on a flat surface It is important that the rain falls unobstructed into the bottle. So, do not conduct measurement in  balcony, sunshades and near parapet wall.
    • Take your rain gauge to the rooftop and place it on a flat surface

    • It is important that the rain falls unobstructed into the bottle. So, do not conduct measurement in balcony, sunshades and near parapet wall.

    • Use multiple bricks/stones around the bottle which helps to hold the bottle firmly to surface.

    • Do not stress the bottle with bricks/ supporting objects as it will result in change of volume of the bottle and it leads to incorrect readings.

  6. Before rain, set up the rain gauge as described in the above steps. Once the rain has stopped, remove the rain gauge from rooftop without spilling the water.
    • Before rain, set up the rain gauge as described in the above steps.

    • Once the rain has stopped, remove the rain gauge from rooftop without spilling the water.

    • The water level in the bottle tells the amount of rain received by your locality for that period of time.

    • Measure the water level by placing on a flat surface

    • The "Scale" pasted to the bottle is not perfectly vertical.

    • Failure to calibrate the bottle to the zero mark before conducting the measurement

    • Inaccurate readings due to bottle being deformed by Bricks/ supporting objects.

    • Measurements taken on a slant surface.

    • Make a rain guage made of larger diameter vessel. Compare the results with smaller diameter rain gauge. Are they same ?

    • Compare your results with rain data from the news and find out the accuracy of rain gauge.

Finish Line

Attached Documents

Kailash NR

Member since: 05/02/2017

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92 Guides authored

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