Urban Structures and Features

We have seen urban networks consist of Urban Junction and Outfall Nodes, alongside Urban Conduits to represent the underlying system.

We will also see that Rain Gage and Subcatchment nodes can be used to specify the Urban Inflow entering the system.

Several other node and link types are available for representing features within your urban system.

Flow-Divider nodes are required as an equivalent to a Junction node to divide flow between two outflow pipes if using Kinematic Wave routing.

The method to add an urban Divider node is identical to that of the Urban Junction and Outfall Nodes, aside from selecting the Divider icon on the 1D Urban Build tab. The methods to move, delete and view urban Flow-Divider nodes also are identical to those for the Junction nodes.

Exactly two outflow links must be connected from a Divider node. Details of diverted flow are specified in the node properties when Working with divider nodes. If using Dynamic Wave routing, any Flow-Divider nodes will be treated as Junction nodes.

In additional to editing urban Divider nodes individually, the urban Multi Edit & View tool is designed to easily Visualise urban networks and Edit multiple components of urban networks.

The final node type is the Storage node, used to represent storage units within your urban system.

The method to add an urban Storage node is identical to that of the Urban Junction and Outfall Nodes, aside from selecting the Storage icon on the 1D Urban Build tab.The methods to move, delete and view urban Storage nodes also are identical to those for the Junction nodes.

Evaporation, seepage and a storage curve can all be defined when Working with storage nodes.

In additional to editing urban Storage nodes individually, the urban Multi Edit & View tool is designed to easily Visualise urban networks and Edit multiple components of urban networks.

Pump and flow-regulator (Orifice, Weir and Outlet) links can be used to connect the nodes in an urban network. They allow the flow to be conveyed between their inlet and outlet nodes in alternative ways to the Conduit link.

A Pump is a link that lifts water between nodes.

Orifice and Weir links represent these features within an urban system, and convey flow using the orifice and weir equations respectively

An Outlet link is used to specify flow not represented by a pump, orifice or weir.

The method to add an urban Pump or Flow-Regulator link is identical to that of the Urban Conduit links, aside from selecting the relevant link-type from the drop-down provided in the Add Link(s) pop-up tool. The methods to delete and move/edit vertices is the same for all link-types, i.e. as with the Conduit link.

In Kinematic Wave routing, these link types are only allowed as the outflow link from an Urban Storage Node.

We refer the user to the Urban Pumps and Flow-Regulators section of the technical reference for further details on each link type, including the equations used.

In additional to editing these urban link types individually, the urban Multi Edit & View tool is designed to easily Visualise urban networks and Edit multiple components of urban networks.