1D domains are made up of a network of channels and nodes where:
Channels represent the conveyance of the flowpaths.
Nodes represent the storage of inundated areas.
There are no constraints on the complexity of the network with any number of channels being able to connect to a single node. Each channel is connected to two nodes; one at the channel’s upstream end the other at its downstream end. As of Build 2002-08-AC, the digitising of nodes is optional.
Note: There must be at least one (1) channel in at least one of the 1D domains. This can be a dummy channel separate to the rest of the domains.
1D networks are created in one or more GIS 1d_nwk layers. The original fixed field format entry may still be used, however, it is strongly recommended to use the GIS format as documented in the following sections.
