potential evapotranspiration (PET) -> δυνητική εξατµοδιαπνοή, δυνητική εξατµισιδιαπνοή, δυνητική εξατµισοδιαπνοή

spiros · 2 · 1363


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potential evapotranspiration (PET) -> δυνητική εξατµισοδιαπνοή

Evapotranspiration (ET) is a term used to describe the sum of evaporation and plant transpiration from the Earth's land surface to atmosphere. Evaporation accounts for the movement of water to the air from sources such as the soil, canopy interception, and waterbodies. Transpiration accounts for the movement of water within a plant and the subsequent loss of water as vapor through stomata in its leaves. Evapotranspiration is an important part of the water cycle. An element (such as a tree) that contributes to evapotranspiration can be called an evapotranspirator.

Potential evapotranspiration (PET) is a representation of the environmental demand for evapotranspiration and represents the evapotranspiration rate of a short green crop, completely shading the ground, of uniform height and with adequate water status in the soil profile. It is a reflection of the energy available to evaporate water, and of the wind available to transport the water vapour from the ground up into the lower atmosphere. Evapotranspiration is said to equal potential evapotranspiration when there is ample water.

εξατμισοδιαπνοή: η ταυτόχρονη εκδήλωση των φαινομένων της εξάτμισης και διαπνοής, τα οποία είναι αλληλοεξαρτώμενα (όταν ο ρυθμός της διαπνοής αυξάνεται, η εξάτμιση του νερού από το έδαφος ελαττώνεται).
« Last Edit: 18 Mar, 2011, 20:23:18 by spiros »


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