Software to verify the working performances and to plan drip line-source 
laterals, in order to save water and energy

 

Survey of the software features and performances


Main characteristics
Ve.Pro.L.G. is a friendly applied software that, after defining the condition of use in field,  can check the potential working performances, in already installed systems, as well as, in planning  stage, it can select the fit drip line model and suggest the fit length and manner of application, in  order to increase the distribution uniformity and to save water and energy in drip irrigation.  The software is already equipped with the performance characteristics of a large number of  drip line source models, tested by the National Irrigation Laboratory (LNI), within a convention
among the Tuscan Agency for the Development and the Innovation in the Agricultural and forest  
sector (ARSIA) and the University of Pisa3 . Ve.Pro.L.G. makes directly reference to these ones,  previous simple chosen from a "pop-up menu", but it can also estimate the working performances of  any other model of drip line, on condition that their performance characteristics are known.  In particular, on existing systems, specifying as inputs: the model of the used drip line, the  ground slope, the length and the working pressure; the tool "Verifying Drip Lateral" reconstructs  the potential performances of the lateral, (i.e. in conditions of correct maintenance and suitable
filtering of the water), issuing in output:
• the minimum, the maximum and the average discharge in litres/hours each meter of line (l/h·m);
• the coefficient of emission uniformity EU (%);
• the distribution efficiency, as percentages of useful water and of lost water in deep infiltration,  to avoid that too much parts of the crop area are under irrigated.
After having performed this check, Ve.Pro.L.G. is able to weigh up the possible changes, that allow to improve the system performances. For instance, we can use the tool "Planning or Modifying Drip Lateral" getting in output:
• the pressure in meters of column of water (m c.w.) to apply at the inlet of the laterals to maximize the emission uniformity or, optionally, to minimize the energetic consumption;
• the maximum allowable length of the lateral to achieve the required degree of uniformity (EU  target);
• the list of the ten of drip line models that, in the same conditions of use, produce the best  emission uniformity.
Otherwise, we can activate the tool "Plans or Modifying Double Drip Lateral", to weigh up the performances that we can achieve splitting the pre-existing length in two laterals, both employing one paired manifold or two single manifolds; the first laid inside the crop field and the second ones laid at the opposite sides of the field edge. In sloping ground, the same tool also determines the fit lenghts of both the upward and the downward laterals and so the right localization of the paired manifold in the field.