Drop Sizes

Raindrops at the ground are surprisingly uniform in size, i.e. within 0.5-4 mm in diameter. The reason is that smaller drops fall slowly and evaporate before they reach the ground, whilst drops larger than about 4 mm or so tend to distort into an unsteady umbrella-like shape and then break up as they fall.

However, drops differ in heavy downpours from those in light falls. They are around 3 mm in diameter when the rate is 100 mm/h, but only 2 mm in 13 mm/h and 0.5 mm in drizzle. The relation between average drop size and rain rate is discussed further in Note 9.D.

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Renewable Energy Eco Friendly

Renewable Energy Eco Friendly

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable.

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