Data such as the equipment file can be built up from scratch or can be imported if the supplier makes it available. Since some entries are difficult to estimate, e. Maximum cycle length days This calculation shows the estimated cycle lengths, as it varies through the year, according to evapotranspiration. Enter information about the crops, irrigation systems and soil properties for all sub-areas to be included in this planning. This figure must be carried forward to the design of the Main pipelines, where the program will optimise between this figure, representing the running cost of the system, and pipe material costs. The graph relation between energy cost and water source pressure To compare costs, it is immediately clear that one of the above costs must be converted so that dimensions will be similar. 
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WCADI can be used graphically or non-graphically. After you press on this item, a form appears to enable you to enter the location and the name of the project to copy from and, also, the project to copy to and the items to be copied including the selection of the case, if enabled for the selected items.
Fortunately only the first of these factors is a true variable, since the others are normally specifications. Small changes can lead to a complete recalculation.
Available irrigation time This time will determine the flow-rate at the water source. In order to distribute water to the crop you need an irrigation system which includes pipe networks, pumps and emitters.
Relation between the interest rate and discounted energy cost. Although this module appears last in the Main menu, the user will, most probably, begin all projects of reasonable size with it.
Two tables are applicable in the options submenu:. The analysis gives the discounted energy cost scadi a cost per unit of head.
Wcadi : the Complete Software for Irrigation Design: User Manual - Google Books
When entering this function the following dialog-box appears: The computations involved required a powerful computer. The practical aspects around these items are much more determining, which makes them specifications rather than considerations. Look at it differently: Numerous irrigation design programs have been developed enabling the engineer to produce a more precise and effective pipe network wcadl and to complete the design work in less time than was previously possible.
The user can get HELP description on a specific function by entering that function and pressing the F1 key. The central part of this screen is divided into two sections: When a new project is defined for the first time, these default values will then be transferred to the new project. This figure must be carried forward to the design of the Main pipelines, where the program will optimise between this figure, representing the running cost of the system, and pipe material costs.
This will become the current project. The format of wcaadi computer output, obtained from the WCADI programs, is suitable for inclusion in the design report to be wcavi to the client or project authority, i. The problem becomes even more complex, if pressure demands at the discharge points are not fixed, such as centre pivots, which can operate at various pressures, depending on their design.
When you start up the program, you obtain the initial screen. A graphical view will appear for the selected project, then he presses OK. Manual calculations can lead to ambiguous or faulty results. A graphical view for mainpipe, network or both will appear for the selected case, then he presses OK.
Project Planning
The user can change to the other system of units at any stage; previously entered information, as well as further calculations, will be displayed in these units. In the non-graphical mode, design parameters are entered by means of filling-in standard tables; in the graphical mode, the input is a combination of graphical entries from the digitizing tablet or screen, but it leads to the completion of part of the same tables.
Therefore energy cost must be discounted over the total lifespan of the project. Most programs developed so far provided at best partial solutions related to specific engineering design calculations and could not formulate a comprehensive, fully computerised irrigation design integrating all project parameters.
It does not have a big effect on the energy cost and is used only to add the cost of the pump to the energy cost. The menu consists of eight functions: To copy all or selected items from a project to the given project. See it this way: Project Planning Home Project Planning.
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