Manholes are physical structures that connect pipes. They may be circular or rectangular in shape.
Junction Type - either Simple Junction or Manhole can be selected.
Easting - The easting coordinate at the centre of the icon on Plan.
Northing - The northing coordinate at the centre of the icon on Plan.
The Cover Level, Depth and Invert Level are linked so that whichever parameter is highlighted with the radio button will be calculated from the other two variables.
Cover Level - The ground level (above datum) and the level at which flooding is reported. An overflow or spillway crest level may be specified at a lower level as part of the outlet control details. If a ground model (TIN) is present the Cover Level will automatically be picked up from the centre of the icon. Above the Cover Level, water will be stored above the ground and then allowed to drain back into the network. The default ponding area used for the flooded volume is 1000m² .
Depth - The depth of the manhole, i.e. the Cover Level minus the Invert Level.
Invert Level - Represents the level (above datum) of the base of the manhole.
Chamber Shape - select the chamber shape as Circular or Rectangular to enable the dimensions to be set.
Diameter - The diameter is shown if Circular is selected as the Chamber Shape.
Length - The length is shown if Rectangular is selected as the Chamber Shape.
Width - The width is shown if Rectangular is selected as the Chamber Shape.