IRSIS, A Software Package for Irrigation Scheduling

by Dirk Raes, Cent for Irrigation Engineering, Belgium,
Herman Lemmens, Cent for Irrigation Engineering, Belgium,
Jan Feyen, Cent for Irrigation Engineering, Belgium,

Document Type: Proceeding Paper

Part of: Computerized Decision Support Systems for Water Managers


IRSIS (IRrigation Scheduling Information System) has been developed to solve problems concerning irrigation scheduling at field level. For a given climate, crop and field it offers the possibilities to calculate the net irrigation requirements and the optimal water distribution resulting in the highest yield under conditions of limited water, to plan or forecast irrigation schedules for different operational conditions, and to evaluate past irrigation schedules. IRSIS shows the consequences of the irrigation schedule in terms of water application efficiency and expected yield response. The main strength of the program, is its capability in calculating quickly alternative irrigation schedules, their consequences and effect on the different entities of the soil water balance. The core of IRSIS is a water balance model which simulates the water flow in the soil and the water uptake by plant roots. IRSIS offers an original approach to the interactive data processing activities. The key to this approach is the fact that IRSIS makes a clear distinction between data processing on a logical or on a physical level. On the logical level, all data is displayed and accessed in a structured and user friendly way, and the underlying physical processing is made transparent to the user.

Subject Headings: Soil water | Hydrologic models | Computer software | Irrigation | Scheduling | Soil strength | Flow simulation | Irrigation systems

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