2 research outputs found
The design and evaluation of travelling gun irrigation systems: enrolador software
Technical Paperinfo:eu-repo/semantics/publishedVersio
DEPIVOT: a model for center-pivot design and evaluation
Available at SciVerse ScienceDirectCenter-pivot sprinkler irrigation became very popular. Hence, aimed at farmers advising, the simulation
model DEPIVOT has been developed with the objective of design new systems or changes in systems in
operation. The software consists of a simulation package developed in Visual Basic and data base in
Access. The model comprises five main sub-models for: (a) computation of the gross irrigation requirements;
(b) sizing of the lateral pipe spans through the hydraulics computation of the friction losses
and respective operative simulation considering to the effects of topography and the possible requirements
of an end gun; (c) selecting a sprinklers package with computation of pressure and discharge at
each outlet and including the consideration of pressure regulators; (d) verification of the sprinklers package
through estimation of runoff potential by comparing application and infiltration rates at selected
locations along the lateral; and (e) estimating the expected uniformity performance indicators when in
operation. The user verifies if performance is within target values set at start and may develop and compare
alternative sprinkler packages until appropriate conditions are obtained. When the model is used for
evaluation of systems under operation using data collected in farmersâ fields performance indicators are
computed and, responding to farmersâ needs, the model may be used to design changes in the existing
systems and to improve management. This paper describes the model and shows examples of applications
to select a sprinkler package and assess the respective runoff potentia