02433naa a2200277 a 450000100080000000500110000800800410001910000280006024501530008826000090024152016550025065000110190565000150191665000160193165000160194765000160196365300150197965300140199465300130200865300130202165300150203465300130204970000170206270000170207977300590209614820952018-06-11       1999    bl uuuu     u00u1 u    #d1 aANDRADE, C. de L. T. de  aSPRINKMOD - pressure and discharge simulation model for pressurized irrigation systems. 1. Model development and description.h[electronic resource]  c1999  aA computer model was developed to simulate pressure and flow rate distribution along pipes and laterals of pressurized irrigation systems in operation. The software runs in a Windows environment and is capable of simulating irrigation systems having multiple pump stations combined in series and/or in parallel, booster pump stations, parallel pipes and looping pipes. Hand-move, wheel line and center pivot laterals with pressure regulators, one or two drop pipes per outlet and booster pump can be simulated. Leakage can be included in the main pipe network or along the laterals. Lateral inlet pressure can be set to an upper limit to simulate valve closure. Practically any type of nozzle and pump can be simulated since cubic spline functions are used to interpolate values from head-flow rate sets of data. To accomplish these capabilities, algorithms were developed and adapted to convert laterals into a set of head-flow rate data so that a simplified algorithm could be adapted to solve the entire pipe network. A userfriendly interface was designed to allow data dor pumps, nozzle and pressure regulators to be interactively entered, edited and analyzed prior to the simulation run. The layout of the irrigation system can be drawn on screen using the mouse. Data can be independently entered and edited for each irrigation system component already drawn in the screen, at any time and in any order. Data for the entire irrigation system are verified at many levels before the simulation is run, to make the model less susceptible to crash. The model proved to be a practical tool for upgrading and designing pressurized irrigation systems.  adesign  airrigation  aHidráulica  aIrrigação  aSimulação  aHydraulica  aProgramas  aPrograms  aProjetos  aSimulation  aSprinker1 aALLEN, R. G.1 aWELLS, R. D.  tIrrigation Science, New Yorkgv. 18, p. 141-148, 1999.