learn.howToCalculate
learn.whatIsHeading
Evapotranspiration is water loss from soil/water bodies and plants. It's critical for irrigation design, water balance, and climate analysis.
단계별 가이드
- 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
풀어진 예시
입력
ET₀ = 5 mm/day, alfalfa (K_c = 1.0)
결과
Daily ET = 5 mm, weekly = 35 mm (irrigation need)
During growing season
피해야 할 일반적인 실수
- ✕Using ET₀ without crop coefficient (over-irrigating)
- ✕Neglecting seasonal variation (summer ET much higher)
자주 묻는 질문
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.
계산할 준비가 되셨나요? 무료 Evapotranspiration 계산기를 사용해 보세요
직접 시도해 보세요 →