Irri4web: crop water needs definition by webgis. A Decision Support System for irrigation scheduling is proposed as a tool for improving agriculture sustainability and adaptations to the ongoing climatic change. In the Italian province of Trento (Trentino-South Tyrol), the newly implemented Public Waters General Exploitation Plan fixes new ceilings to the use of irrigation water and aims at its optimisation by setting up limits to soil moisture. The system was implemented for the pilot area of ”Val di Non”, 192 km(2) almost completely devoted to apple growing. The protocol entails the assessment of water content in a soil parcel, given its location and the history of the latest irrigation actions. The water balance is carried out with rainfall and temperature values spatially interpolated from the neighbouring meteorological stations. Hargreaves’ equation is used for the calculation of evapotranspiration, and pedologic information is inferred by a ”(pedo-) landscape map” compiled for this purpose. An estimate of soil water content is provided to end users. The spatial interpolation of rainfall and temperature is carried out either by inverse-distance (squared) weighted mean (IDW) or kriging; both algorithms duly take into account elevation. Soil water content is calculated from 7 days before to 3 days after user’s request. Weather forecasts are provided by the local weather service. The system is presently ready for its distribution to farmers and agricultural syndicates.

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  1. Tóth, Róbert; Somorčík, Ján: On a non-parametric confidence interval for the regression slope (2017)