Environmental Sciences, asked by Rashivashist8553, 10 months ago

What is the pan evaporation rate during rainy days?

Answers

Answered by manikiran18
0

Explanation:

Evaporation is a process by which liquid transformes in to gas or

vapors. The atmosphere receives its supply of moisture from the earth‟s

surface through evaporation from oceans, lakes, rivers etc, and takes about

600 calories water of energy to convert 1 gram of water vapor (Robertson,

1955). During evaporation, water molecules absorb energy which gives

them the motion required to escape from the surface of liquid and become

gas. This energy is subsequently released as heat when condensation takes

place, and water vapor changes back to the liquid state. The heat absorbed in

the process of evaporation is referred to as the latent heat of evaporation.

Latent heat means hidden or stored heat. Since a certain amount of energy is

consumed in the process of evaporation the remaining liquid is cooled by an

equivalent amount (Carder,1960).

Evaporation is a cooling process and it has cooling effect on

evaporating bodies. When the rain drops fall through the dry layers of

atmosphere, the process of evaporation chill the air. This is so because most

of the energy needed for evaporating water which is provided by the air it

self.

Since temperature is the primary control of evaporation naturally

decrease from the equator towards the north. However, actual evaporation is

different from potential evaporation. Besides temperature, wind speed and

relative humidity, it also depends on the available water to be evaporated on

land surface. In fact, the evaporating power of air is many times greater than

the available water supply. Water entering the evaporation phase of the

hydrological cycle becomes unavailable and cannot be recovered for further

use. This is an important consideration in the planning and management of

water resources.

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