Connecting inlets and outlets

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Once you have designed a pond and incorporated it into a drainage system model,

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you must properly connect it to the model.

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This includes designing an inlet that connects it to upstream pipes

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and an outlet that connects it to the discharge control point downstream.

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He was a background image to position these pipes correctly.

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So load the pond pipe dot D xf file into the cad data.

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Make sure the snap tool is activated

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in the planned ribbon.

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To start, you must first select a connection type

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with a model open in the plan view,

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navigate to the toolbox and expand the connections node.

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Here there are several different connection types available.

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Pipe is one of the most common connections used

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so selected from the toolbox,

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click and drag the pipe connection to anchor its start 0.2 manhole S. 15.

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Then with the connection still attached to the cursor,

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click again following the background image to place the connection endpoint,

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you may need to zoom in to snap this correctly.

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It is best practice to then reactivate the

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select tool to avoid creating additional connections.

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You can now double check this connections properties.

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By double clicking the pond icon.

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In the pond dialog select inlets.

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The inlet type drop down is set to point in

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flow by default for the single inlet you just created,

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click ok

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with the pond's inlet set,

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it is now time to connect an outlet

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again, click and drag the pipe connection to the pond,

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making sure to drop the start point to snap to

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the background image of the pipe leaving the pond.

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Then

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drag the end point to the receiving Manhole which is Manhole s. 16 in this example

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notice that when you hover the cursor over the manhole icon,

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it now presents contextual options for new

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or inlet depending on the cursors location.

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Situate the cursor so the manhole icon says inlet.

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Then click again,

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click the select tool from the toolbox before you continue working,

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an outlet icon now appears in the pond.

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Double click it to open its properties.

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By default, the outlet type is set to free discharge,

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expand the drop down menu to change it to an orifice.

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You must now calculate the diameter of the orifice so that

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it limits the discharge from the pond to 16.1 L per second

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which was a value calculated earlier

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in the pond dialog,

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click the diameter calculator icon and set the design depth field to 1.675 m,

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the maximum depth in the pond up to the free board level

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and the design flow field to 16.1 liters per second.

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Lead the coefficient of discharge set to 0.600. As it is in this example,

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You will see the diameter field is grayed out with a value of 0.077 m.

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Keep in mind that if you believe the diameter will be

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small enough to be susceptible to blockages during rainfall events,

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you may need to incorporate a cage or perhaps use a different control device,

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click OK

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Back in the pond, dialogue notice that the orifice diameter now displays as 0.077.

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You must now provide diameters for the two pipes which were recently added

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using the select tool.

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Double click the pipe entering the pond.

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The connections table opens

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The pipe entering the pond is currently called pipe and the one leaving is pipe one

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Set the Diameters for both pipes to 600.

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And then click OK.

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It is now time to make sure the pond is properly connected

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to the rest of the drainage system,

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navigate to the tree view.

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Right, click the flow paths node

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and select add

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You could click any manhole upstream of the pond to

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set a start point for a new flow path.

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But for this example, select manhole? S. one

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then

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hover your cursor over the manhole. S. 17 downstream from the pond,

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you will see the cursor turn green,

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click the manhole to set the new flow path which highlights in red.

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Lastly

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you can check the profile view of the new flow path to see if there are any errors

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in the tree view, expand the flow paths node and right click flow path,

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then select show profile.

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This opens the profile flow path dialog which displays the flow

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paths elevation in relation to its start and end points.

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The profile also shows the ponds inlets and outlets.

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When you're finished with your review.

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Close the dialog