Ezigrade (version 2)

Drains Menu (Preliminary Documentation)

Please note the drains menu documentation is preliminary. The release version to paid up users will be released first and then the trial version.
Please note that the drains routines also allow you to develop banks, ring tanks etc. A bank is just an inverted drain.
Drains are an integral part of the water management process. We have attempted to allow there design in as simple a graphical method as possible. Where possible we have made the computer do the work. If you believe we can simplify a process; please let us know.
We can have an unlimited number of drains.
Clicking on the Drains menu displays the following menu:
Insert Drain
Clicking on this menu item starts the process to import the drain. We draw in the drain as a series of line segments. Firstly left click on the screen. Now move the mouse and left click again at the second node. Keep going until you are happy with what you have. Click the "Enter" key to finish the process or "escape" key to abandon the complete entry. The process is the same as entering section links. Once complete the plan view of the drain is shown.
Drain Properties
Once you have inserted the drain. This drain is now the current active drain. Click on this menu item and we have the following Dialog displayed.
These are general parameters that define how the drain is drawn and defined.
The drain can be referenced back to the natural surface (normally 1) or the design surface (normally 2). Some instances where you would reference back to the natural surface is:
  • pre-create some drains to eliminate ponding area's before doing a grading solution where water runs to the edge of the job
  • design of a drainage network without grading
  • design drain in a section of the job and grade the remaining.
You may use the design surface for creating a drain on top of the graded surface. This elimanates issues matching up drain edges and drains.
Set the Corridor width to a value that is wide enough for the drain batters to hit the surface (daylight point).
The "Clear Background" tick box means that we can see the contours and string lines associated with the drain without background job peeping through. You can also untick this if you need to reference background as well.
We suggest that you set the maximum and minimum contour intervals to match the background surface.
Design Profile
This allows you to design the new center-line profile for your drain. Clicking on this option brings up a new view which looks like the following:
Design your profile as appropriate.
Design Section
Clicking on this option brings up a dialog that allows you to specify how the drain is drawn in a cross section view.
At present we can have either a V drain or a Box drain. A V drain simply looks like the letter "V" while a Box drain has a flat bottom and batters.
The "Type of Batter" we support at present are:
  • batter grades - grade to the batter
  • batter width - draw the batter at a fixed width and intersect with the defined surface
  • batter to field edge - draw the batter until it intersects with a section line at the defined batter grade
  • length to field edge - draw the batter until it intersects with a section line and take the height of the defined surface
We can specify which sides to draw. Not much point however not drawing either surface.
"Width Drain" sets the width of the defined drain. Only applicable for Box drains.
This calculates the drainage design and redraws the drain on the screen. In the example shown we have a drain that match's a grading design running both sides of the drain.
Merge Drain into Natural
This takes the visual design we can see on the screen and creates a modified natural surface that reflects this design.
For advanced users: The software adds in extra points to the database and creates appropriate breaklines that reflect the strings shown upon the drain. Also any existing points within the drain corridor are set to non-contourable. You can go into CDS and tweak these values if necessary. However it shouldn't be necessary.
UnMerge Drain
Reverses the process above and sets it back to original.
Merge Drain into Design
Same as above except we are using the design surface. If we merge the design above we get:
Unmerge Drain Design
Resets the above process.

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