ET₀ & Irrigation: uses and methods
uses the FAO-56 daily scale model to estimate crop water consumption and net irrigation.
Applicable scope and calculation boundary
Daily scale reference evapotranspiration; input net radiation and 2 m wind speed. Single crop coefficients, without complex root zone/salt model.
model and reference method
FAO Irrigation and Drainage Paper 56, Formula 6.
model version: 1.0.0. The results are used for scientific research, exploration and teaching, please interpret according to the model conditions.
input parameters
- lowest temperature（°C）
- Value range: -30 – 50
- highest temperature（°C）
- Value range: -20 – 60
- average relative humidity（%）
- Value range: 1 – 100
- 2 m wind speed（m/s）
- Value range: 0 – 30
- Daily net radiation Rn（MJ/m²/d）
- Value range: -5 – 40
- altitude（m）
- Value range: -400 – 5000
- crop coefficient Kc
- Value range: 0.1 – 1.5
- daily effective rainfall（mm/d）
- Value range: 0 – 200
- irrigation efficiency
- Value range: 0.1 – 1
How to use
- Load the example or enter data that matches the field description.
- Confirm units and models, run calculations and check diagnostics.
- Export charts, tables or results packages and record model versions.
tools in the same field
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