When we hear in the news or read in the newspaper that today we received 1 cm or 10 cm of rain in a day for a place, have you wondered how much water exactly poured down on that day for that location? Well, some of you would have known this as a part of your studies, as part of your work, or as an enthusiast. I happened to know about this, as part of my studies, but two of my seniors helped me to understand the calculation step by step. Some of us might have known it as a table memorised like any other constant. For instance, 1cm of rain on 1 ha of land is equal to 1 lakh litres of water. I think knowing the calculations helps us to understand them better.
So, here is the calculation:
1 hectare (ha) = 10,000 sq.m
1 cm. = 0.01 m
Therefore:
1 ha cm = 10,000 sq.m x 0.01 m = 100 cubic meters
so,
1 ha cm is equivalent to 100 cubic meters
wherein
1 cubic meter = 1000 litres
Hence:
100 cubic meter = 100 x 1000 = 1,00,000 litres of water.
Once you know the calculation, you can compute the amount of water for any location with the received rainfall. So, next time you hear the rainfall amount and know the area, you can easily calculate the amount of water received in litres.
These are simple things, but it is up to us to decide how to perceive them and think about how to use them better. When we hear 1 cm of rainfall, we don't give it much importance, right? Instead, if we hear that as 100,000 litres of water (1 cm of rain on 1 ha of land) is received, it might ring a bell in our minds. This shows how perception varies.
This is a simple calculation, but it has a greater impact when we think of the water received in terms of litres. Understanding smaller things gives us a bigger picture.
So, Enjoy Life With Science.
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