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Irrigation—Principles & Practices

Unit 1.5 | Part 1 – 245
Appendix 1: Water Cycling Terms

Appendix 1: Water Cycling Terms

SATURATION

Illustrations by José Miguel Mayo

Transpiration: water loss from the plant leaves

Evaporation: water loss from the soil surface

Transpiration + Evaporation = Evapotranspiration (ET)

Over application of irrigation water can cause

leaching of nitrogen and phosphorus from

the root zone and can cause contamination of

aquifers, streams, ponds, and lakes.

Initial state

Initial state

Initial state