<code>DH</code> returns the value of daylight hours.

Calculation of Evapotranspiration by FAO Penman-Monteith equation based on Allen, R. G., Pereira, L. S., Raes, D., Smith, M. (1998, ISBN:92-5-104219-5) "Crop evapotranspiration - Guidelines for computing crop water requirements - FAO Irrigation and drainage paper 56".

Ali Ahani

FAO56

Evapotranspiration Based on FAO Penman-Monteith Equation

DH function

<dl><dt>omega_s</dt>
<dd>A numeric scalar that denotes the sunset hour angle [rad].</dd></dl>

Arguments

<a href="https://www.fao.org/3/x0490E/x0490e00.htm">Allen, R. G., Pereira, L. S., Raes, D., &amp; Smith, M. (1998).
 Crop evapotranspiration - Guidelines for computing crop water requirements - FAO Irrigation and drainage paper 56.
 Fao, Rome, 300(9), D05109.</a>

Reference

Daylight Hours (N) — DH

<dl>

<dt>omega_s</dt>
<dd>A numeric scalar that denotes the sunset hour angle [rad].</dd>

</dl>

<a href='https://www.fao.org/3/x0490E/x0490e00.htm'>Allen, R. G., Pereira, L. S., Raes, D., &amp; Smith, M. (1998).
 Crop evapotranspiration - Guidelines for computing crop water requirements - FAO Irrigation and drainage paper 56.
 Fao, Rome, 300(9), D05109.</a>

DH: Daylight Hours (N)

Description

Usage

Value

Arguments

Reference

Details

See Also

Examples