COMPUTER ASSISTED DESIGN AND OPERATION OF AN IRRIGATION SCHEDULE

D. Raes, P. Van Aelst
With a set of computer programs, the seasonal net irrigation requirements are calculated for a given climate, crop and soil and number of growing seasons. From the calculated requirements, one value with the required probability of non-exceedance is selected. On the basis of the selected net irrigation requirement, a fixed irrigation schedule is designed. An example is presented for Jaca in Spain. In stead of using a fixed irrigation schedule based on historical climatological data, the scheduling can be adapted to actual weather. For different horticultural crops grown on a silty clay loam, it has been calculated that 9 to 15 % of irrigation water could be saved over a period of 9 years with such a dynamic irrigation schedule. The scheduling guidelines for the next days were predicted by the BUDGET-model. BUDGET is a simple soil water balance model, which however considers water movement above field capacity. The importance of this on irrigation scheduling is demonstrated.
Raes, D. and Van Aelst, P. (1988). COMPUTER ASSISTED DESIGN AND OPERATION OF AN IRRIGATION SCHEDULE. Acta Hortic. 228, 45-52
DOI: 10.17660/ActaHortic.1988.228.3
https://doi.org/10.17660/ActaHortic.1988.228.3

Acta Horticulturae