Evaporation
is the process where a liquid changes to its gaseous state at free surface.
This is due to the absorption of heat from surrounding, which grant the liquid
molecules sufficient energy to escape the water body.
The rate of
evaporation is mainly affected by vapour pressure, temperature, wind,
atmospheric pressure and impurities content. Evaporation can be measured by
using evaporimeters. To accurately represent the actual evaporation using these
devices, we need to apply pan coefficient to the collected data.
Similar to
rainfall gauge station, evaporimeter needs to be established in the form of
network. Its intensity is depending on the regional climate.
The following shows some information about evaporation and how we should measure it. Watch the video above for full details.
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