Ezigrade (version 2)

Drains Menu

 
 
The drains routines also allow you to develop banks, ring tanks, contour banks, head ditch's, simple road 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. At present we have the options to:
 
  • Add. Click on this option and left click into the view. A new node is added.
  • Delete. Click on an existing node. The node is deleted.
  • Move. Click on an existing node and drag. Release when at the right position
 
 
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.
 
 
Working our way down the dialog:
 
  1. Specify whether we have a "V" or a "Box" drain. A "V" drain simply looks like the letter "V" while a "Box" drain has a flat bottom.
  2. Fill in the drain "Width" if using a box drain.
  3. Now tick left and right to get both sides of the drain drawn in. Along edge of the job you may only want one side drawn.
  4. We now specify whether drain is used in conjunction with either the natural (picked up surface) or the designed (finished) surface.
  5. We now specify whether we have included banks on either side of the drain. Tick appropriate box and they are included. Untick and they are not included.
  6. Specify the type of batter to be used. At present we have the following options
        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
        join to field edge - draw the batter until it intersects with a section line and takes the height of the defined surface.
  7.   Specify the batter grades or distance out the batter extends.
 
Here are some typical cross-sections you can achieve:
 
 
V Drain:                                                                                V Drain: (Design the profile above the surface and we have a simple bank)         
 
               
                          Box Drain:                                                                              Box Drain:  (Design the profile above the surface and we have a bank)
 
 
                     
Box Drain with included banks                                                  Box drain with included banks: (Profile above the surface - with negative grade and we have a bank with 2 drains)
 
                     
 
              Here we have box drain and only include bank on the right:
We can use this as a contour bank
We can also use as a head ditch
 
 
 
 
Recalculate
 
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. Once done the drain is now locked. This enables us to seamlessly unmerge the drain later if required. To see the modified surface untick the drain icon at the top of the page.
 
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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