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A computer program called Forecasting Irrigation and Statistical System (SIPRES) was created to forecasting crop irrigation and support management of collective irrigation systems. The system has meteorological stations with storing and transmitting data, computers, equipment to measure soil moisture content, two persons and vehicles complement the supports to operating. It had been used to facilitate the operation channel network to deliver water to users in farm turnouts. Algorithms had developed in first place to forecasting when and how much irrigate in each plot in real time, in second place, to calculate projections of water future demand for all the irrigation district and finally, forecasting discharges per week in control points of the irrigation network. This system has been used in Valle del Carrizo, Sinaloa, Mxico, in 43,855 hectares, with 4989 users. Was applied in forecasting irrigation, in programming the irrigation service, forecasting discharges in control points of the network of channels and to support technically an emergency operative to ensure the agricultural production, because of there were not enough water to irrigate crops.