Tutorial: Irrigation Performance Indicators and Water Productivity

5. Compute Indicators Using Indicators Calculator Tab

5.7. Yield

We'll calculate now the Yield.

1. In the Indicator Selection dropdown, select Yield.

Formula: Y = HI * AOT * fc * (TBP / (1 - MC))

Parameters for Oued Hellal:

MC: 0.15 (Moisture content, dry matter over fresh biomass)
fc: 1.46 (Light use efficiency correction factor)
AOT: 0.85 (Above ground over total biomass production ratio)
HI: 0.48 (Harvest Index)

Note: These parameters are specific to the type of crops that are grown in the study area.

2. In the Formula Parameters, select the Total Biomass Production raster (WH_TBP_2022_10_01).

3. Enter the above parameters and name the output file WH_Yield_2022_10_01.

4. Click Calculate Indicator. The output raster will be saved and loaded into QGIS.