start:hype_model_description:processes_above_ground
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start:hype_model_description:processes_above_ground [2019/08/27 15:34] cpers [Alternative potential evaporation models] |
start:hype_model_description:processes_above_ground [2019/09/20 12:50] cpers [Alternative potential evaporation models] |
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| === Model 5 - FAO Penman-Monteith === | === Model 5 - FAO Penman-Monteith === | ||
| - | The FOA Penman-Monteith potential evaporation depends on net downward radiation (//netrad//), slope of saturated vapour pressure curve (//dsatvap//), saturated and actual vapour pressure (//satvap// and //actvap//), temperature (//T//), wind speed (//wind//) and a psychrometric constant (<m>gamma</m>). One land use dependent parameter (crop coefficient //kc5// or //kc//) is used. | + | The FAO Penman-Monteith potential evaporation depends on net downward radiation (//netrad//), slope of saturated vapour pressure curve (//dsatvap//), saturated and actual vapour pressure (//satvap// and //actvap//), temperature (//T//), wind speed (//wind//) and a psychrometric constant (<m>gamma</m>). One land use dependent parameter (crop coefficient //kc5// or //kc//) is used. |
| <m> epot_{base} = MAX(0,kc*{0.408 * dsatvap*netrad + gamma*{{900}/{T+273}}*wind*(satvap-actvap)}/{dsatvap+gamma*(1+0.34*wind)}) </m> | <m> epot_{base} = MAX(0,kc*{0.408 * dsatvap*netrad + gamma*{{900}/{T+273}}*wind*(satvap-actvap)}/{dsatvap+gamma*(1+0.34*wind)}) </m> | ||
start/hype_model_description/processes_above_ground.txt ยท Last modified: 2024/02/21 08:54 by cpers
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