start:hype_model_description:hype_human_water
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start:hype_model_description:hype_human_water [2024/02/21 09:13] cpers [Links to file reference] |
start:hype_model_description:hype_human_water [2024/02/21 09:14] (current) cpers [Irrigation water demand] |
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| ET0 follows the dynamics described above (<m>ET_0 = epot</m> here following Wisser et al. (2008)). KCB depends on crop type and phenological stage, which is defined in CropData.txt. KCB is constant during the initial development stage, then increases linearly during the development stage until it reaches the mid-season stage during which it is again constant. Finally, <m>K_{CB}</m> decreases linearly from the end of the mid-season stage until the end of the season. The dynamics of <m>ET_0</m> and <m>K_{CB}</m> produces a dynamic <m>T_P</m> profile (Figure 3). Allen et al. (1998) provide indicative values for <m>K_{CB}</m> (cf. their Table 17). | ET0 follows the dynamics described above (<m>ET_0 = epot</m> here following Wisser et al. (2008)). KCB depends on crop type and phenological stage, which is defined in CropData.txt. KCB is constant during the initial development stage, then increases linearly during the development stage until it reaches the mid-season stage during which it is again constant. Finally, <m>K_{CB}</m> decreases linearly from the end of the mid-season stage until the end of the season. The dynamics of <m>ET_0</m> and <m>K_{CB}</m> produces a dynamic <m>T_P</m> profile (Figure 3). Allen et al. (1998) provide indicative values for <m>K_{CB}</m> (cf. their Table 17). | ||
| - | The growth season (and irrigation period) start on the plant day. The growth start is determined by a constant (//plantday//) or depending on climate similar to the options for [[start:hype_model_description:hype_np_soil#potential_vegetation_uptake_of_nitrogen|nutrient uptake]]. If it is dynamically determined by the degree-day method it is set to the first day of the year which has a degreeday sum (//GDD//) above a threshold (//gsgddsow//). | + | The growth season (and irrigation period) start on the plant day (//planting//). The growth start is determined by a constant (//plantday//) or depending on climate similar to the options for [[start:hype_model_description:hype_np_soil#potential_vegetation_uptake_of_nitrogen|nutrient uptake]]. If it is dynamically determined by the degree-day method it is set to the first day of the year which has a degreeday sum (//GDD//) above a threshold (//gsgddsow//). |
| The degreeday sum (//GDD//) is calculated as | The degreeday sum (//GDD//) is calculated as | ||
start/hype_model_description/hype_human_water.txt ยท Last modified: 2024/02/21 09:14 by cpers
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