Verifiable Water Use Inventory Using ICT …
25
Fig. 6 RDI scheduling simulated (2019). Precipitation distribution, effective rainfall, irrigation
scheduling and evolution of the soil moisture depletion level throughout the crop season with respect
to the Allowable Depletion Level (ADL), Readily Available Water (RAW) and Total Available Water
(TAW)
(approximately 300 DOY) with the arrival of new rains, the Dr decreased increasing
the amount of water stored in the soil.
The amount of water that is stored in the soil and usable by the crop (ER) depends
on the moisture content of the soil. In Fig. 5a, both P (orange) and ER (green)
have been represented. The lower the moisture depletion (Dr) and the higher the
precipitation, the lower the ER. Thus, it can be seen, for example, on the 31st day of
the year, when the gross precipitation was 22 mm, but only 5 mm is useful for the
plant, the rest were lost by percolation and runoff/evaporation. On the other hand,
between days 91 and 121, ER equals P because the Dr was high, and the soil had the
capacity to store all the rain. The estimated total effective rainfall for 2019 with the
use of the FIR strategy was 247 mm.
The application of controlled deficit irrigation strategies (RDI), such as the one
shown in the second simulated scenario (Fig. 6), distributed the water allocation
according to the crop cycle, making use of an adaptation for irrigation deficit coefficient (IDC) values proposed by Garcia-Tejero [20]. The IDC was used to distribute
the available daily water in the daily calculation of the irrigation needs of the crops,
avoiding or reducing as much as possible the stress in the periods in which the crop
is more sensitive: the flowering and the setting. Unlike the first scenario shown, in
this case, the daily irrigation program was not so limited by the allocation of water.
Since the water allocation for the season was 500 mm and the gross needs of the
25
Fig. 6 RDI scheduling simulated (2019). Precipitation distribution, effective rainfall, irrigation
scheduling and evolution of the soil moisture depletion level throughout the crop season with respect
to the Allowable Depletion Level (ADL), Readily Available Water (RAW) and Total Available Water
(TAW)
(approximately 300 DOY) with the arrival of new rains, the Dr decreased increasing
the amount of water stored in the soil.
The amount of water that is stored in the soil and usable by the crop (ER) depends
on the moisture content of the soil. In Fig. 5a, both P (orange) and ER (green)
have been represented. The lower the moisture depletion (Dr) and the higher the
precipitation, the lower the ER. Thus, it can be seen, for example, on the 31st day of
the year, when the gross precipitation was 22 mm, but only 5 mm is useful for the
plant, the rest were lost by percolation and runoff/evaporation. On the other hand,
between days 91 and 121, ER equals P because the Dr was high, and the soil had the
capacity to store all the rain. The estimated total effective rainfall for 2019 with the
use of the FIR strategy was 247 mm.
The application of controlled deficit irrigation strategies (RDI), such as the one
shown in the second simulated scenario (Fig. 6), distributed the water allocation
according to the crop cycle, making use of an adaptation for irrigation deficit coefficient (IDC) values proposed by Garcia-Tejero [20]. The IDC was used to distribute
the available daily water in the daily calculation of the irrigation needs of the crops,
avoiding or reducing as much as possible the stress in the periods in which the crop
is more sensitive: the flowering and the setting. Unlike the first scenario shown, in
this case, the daily irrigation program was not so limited by the allocation of water.
Since the water allocation for the season was 500 mm and the gross needs of the