This shows you the differences between two versions of the page.
Both sides previous revision Previous revision | Next revision Both sides next revision | ||
start:hype_model_description:processes_above_ground [2019/03/19 16:12] cpers [Evaporation] |
start:hype_model_description:processes_above_ground [2019/08/27 15:34] cpers [Alternative potential evaporation models] |
||
---|---|---|---|
Line 181: | Line 181: | ||
=== Model 4 - Priestly-Taylor === | === Model 4 - Priestly-Taylor === | ||
- | The Priestly-taylor potential evaporation depends on net downward radiation (//netrad//), slope of saturated vapour pressure curve (//dsatvap//), latent heat of vaporization (<m>lambda</m>) and a psychrometric constant (<m>gamma</m>). One general parameter (//alfapt//) are used and one land use dependent (crop coefficient //kc4// or //kc//). | + | The Priestly-Taylor potential evaporation depends on net downward radiation (//netrad//), slope of saturated vapour pressure curve (//dsatvap//), latent heat of vaporization (<m>lambda</m>) and a psychrometric constant (<m>gamma</m>). One general parameter (//alfapt//) are used and one land use dependent (crop coefficient //kc4// or //kc//). |
<m> epot_{base} = MAX(0,kc*alfapt * {dsatvap*netrad/lambda*(dsatvap+gamma)}) </m> | <m> epot_{base} = MAX(0,kc*alfapt * {dsatvap*netrad/lambda*(dsatvap+gamma)}) </m> |