Question

For the measurement of rainfall the rain gauge should be placed _____cm above the ground.
A) 30
C) 40
C) 50
D) 60

Answer 1

Hint:The rainfall intensity measurement unit is linear depth per hour, usually in millimeters per hour (mm h–1). Due to the high variability in intensity from minute to minute, rainfall intensity is usually estimated or extracted over one-minute time intervals.

Complete answer:
The 203mm (8 inch) rain gauge is the standard instrument for measuring rainfall. This is basically a 203mm diameter circular funnel that absorbs the rain into a graduated and calibrated cylinder. Up to 25mm of precipitation can be measured by the measuring cylinder.
Steps to measure rainfall:-
1. Measure the bucket's diameter at the level of the rain. Twice the thickness of the walls, subtract it.
2. Measure the bucket diameter in the same way at the rim.
3. Calculate the two diameters on average.
4. To find the average radius, divide it by two.
5. Find the average rain volume = Depth x radius x radius x 3.14.
6. At the top of the bucket, locate the field
7. Measure the diameter
8. To get the radius, divide the diameter by 2.
9. Superficie = radius x radius x 3.144
10. Divide by this field the amount of rainfall
11. Normally, the rain gauge is put in the earth, leaving the top of the funnel above ground, about 30 cm above the ground, so that the container or jar can absorb water.

Based on the above-mentioned, the correct answer is Option A.

Note:It is possible to calculate the speed of the wind by using an instrument called an anemometer. An anemometer looks like a weather vane, but it has four cups instead of measuring the way the wind is blowing with pointers, so that it can measure wind speed more accurately.