vapour_pressure_curve_slope#
- hydrometlib.evapotranspiration.vapour_pressure_curve_slope(es, ta)[source]#
Slope of vapour pressure curve (delta) [kPa degC-1]
\[\Delta = \frac{4098 \, e_s}{(T_a + 237.3)^2}\]References
FAO-56 Chapter 3 (eq. 13) https://www.fao.org/4/x0490e/x0490e07.htm#calculation%20procedures
- Parameters:
es (
Expr) – Saturation vapour pressure [kPa]ta (
Expr) – Air temperature [degC]
- Return type:
Expr- Returns:
Expression or Series to calculate delta