Depleted Fraction (DF)

Ratio of water beneficially consumed (crop ET) to total water inflow, used to assess basin-level water allocation.

depleted_fraction(crop_et, total_inflow, verbose = TRUE)

Arguments

crop_et

Numeric vector. Beneficial crop evapotranspiration (mm).

total_inflow

Numeric vector. Total water inflow: irrigation plus effective rainfall (mm).

verbose

Logical. If TRUE, prints informational messages. Default TRUE.

Value

Numeric vector. Depleted fraction (proportion, 0 to 1).

Details

Formula: $$DF = \frac{ET_{actual}}{Water_{supplied}}$$

References

Perry, C., Steduto, P., Allen, R.G. & Burt, C.M. (2009). Increasing productivity in irrigated agriculture: Agronomic constraints and hydrological realities. Agricultural Water Management, 96(11), 1517-1524. doi:10.1016/j.agwat.2009.05.005

Examples

depleted_fraction(crop_et = 320, total_inflow = 500)
#> Depleted fraction computed.
#> [1] 0.64