Cum se calculează Evapotranspiration
Ce este Evapotranspiration?
Evapotranspiration is water loss from soil/water bodies and plants. It's critical for irrigation design, water balance, and climate analysis.
Ghid pas cu pas
- 1Reference ET (ET₀): well-watered grass, calculated from temperature, humidity, wind, radiation
- 2Actual ET: ET₀ × crop coefficient (varies 0.2-1.2 by crop)
- 3Typical: 100-200 mm/month depending on climate
Exemple rezolvate
Intrare
ET₀ = 5 mm/day, alfalfa (K_c = 1.0)
Rezultat
Daily ET = 5 mm, weekly = 35 mm (irrigation need)
During growing season
Greșeli frecvente de evitat
- ✕Using ET₀ without crop coefficient (over-irrigating)
- ✕Neglecting seasonal variation (summer ET much higher)
Întrebări frecvente
Why does crop type matter?
Deep-rooted crops (alfalfa) use more water; shallow (lettuce) less. Reflectance and canopy architecture differ.
How do you measure ET?
Lysimeters (soil columns), energy balance models, or empirical equations from climate data.
Ești gata să calculezi? Încercați calculatorul gratuit Evapotranspiration
Încercați singur →