Recent Articles
Zoom Factor option
The scale of a drawing on the screen can be changed by calling the Zoom Factor option from the View menu or the Toolbar item . The cursor is changed to a magnifying glass. To apply this, click the place where you want the centre of the enlarged or ...
ARR 2019 Initial loss - Continuing loss (IL-CL) hydrological model
The IL-CL hydrology procedure in DRAINS is an alternative to Horton (ILSAX). Both methods are accepted in the ARR 2019 guidelines and discussed in Book 5 Chapter 3. The IL-CL model and its parameters are set out in Section 3.5.3 of ARR 2019. ARR 2019 ...
Wizards
These are small calculators included in DRAINS to assist tasks such as: defining inlet capacity relationships for on-grade and sag pits, determining diameters for orifice controls in detention basins, Other tasks are handled by the DRAINS Utility ...
Weirs as alternatives to overflow routes
The special weir object in DRAINS can be used as an alternative to an overflow route at sag pits when the hydraulic control is a parabolic weir. For example, if a user has access to the Full unsteady hydraulic model option in DRAINS, the overflow ...
Weir tool
This tool, , is used to draw multiple outlets from detention basins, even when these are subject to tailwater influences. Like the orifice tool, it is only available with the Full Unsteady Hydraulic Model. These objects link a detention basin to a ...
Popular Articles
Wizards
These are small calculators included in DRAINS to assist tasks such as: defining inlet capacity relationships for on-grade and sag pits, determining diameters for orifice controls in detention basins, Other tasks are handled by the DRAINS Utility ...
Stream and catchment roughness
The hydraulic equations used to describe flows and their characteristics include various roughness factors such as Manning's n, Chezy's C and the Colebrook-White e or k factor. The rougher the pipe or channel, the greater the friction losses and ...
Major/Minor design for a street drainage system at Gymea, NSW, using the extended rational method
The file for this example is Gymea Rational & ERM ARR 2019 Example - Lite.drn, located in the folder C:\ProgramData\Drains among the Lite examples. If this folder is hidden, in File Explorer select the View tab and tick the Show Hidden Items box to ...
Major/Minor design for a street drainage system at Gymea, NSW, using the rational method
The files for this example are Gymea Rational & ERM ARR 1987 Example - Lite.drn and Gymea Rational & ERM ARR 2019 Example - Lite.drn, located in the folder C:\ProgramData\Drains among the Lite examples. If this folder is hidden, in File Explorer ...
Major/minor design for a small street drainage system at Gymea, NSW, using an IL-CL model and Lite hydraulic calculations
The initial loss - continuing loss urban hydrological model recommended in ARR 2019 is applied in this model, along with the rainfall ensembles and median design procedure for ARR 2019. A DRAINS file for the example, named Gymea IL-CL Example - ...
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