AquaCrop - The FAO Crop Water Productivity Model

Input requirements

Input Requirements

AquaCrop uses a relatively small number of explicit parameters and largely intuitive input variables that are either widely available or can be determined using simple methods. Inputs consist of weather data, crop and soil characteristics, and management practices that define the environment in which the crop will develop. The model divides soil characteristics into soil profile and groundwater characteristics, and categorizes management practices as either field management or irrigation management practices (see figure below).

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AquaCrop input requirements

Climate

Weather data collected at field or from agro-meteorological stations

  • Minimum and maximum air temperature
  • ETo (use for ETo calculator)
  • Rainfall
  • CO₂ concentrations (predictions)
  • Crop

    Calibrated and validated crop characteristics from database

    • Adjust cultivar specific and less conservative parameters

    Soil

    Soil profile characteristics

  • field observations
  • default values in database
  • pedo transfer functions
  • gravel and permeability
  • +

    Characteristics of groundwater table

  • depth below soil surface
  • salinity

  • Management

    Field management practices

  • soil fertility level
  • practices that affect the soil water balance
  • weed management
  • +

    Characteristics of groundwater table

  • irrigation method
  • application depth and time of irrigation events
  • salinity of the irrigation water