1D Pumps: Difference between revisions

Because pumps are zero length channels they do not create automatic nodes at the upstream and downstream end. If you ran the model with just a pump polyline and SX connection you will get <u>[[TUFLOW_Message_1353| <font color="red"><tt>ERROR 1353 - No NA data for Node]]</tt></font><ttu>.</tt>]] To remove this error, the most efficient schematisation is to digitise a 1d_nwk 'NODE' at the upstream and downstream end of the pump (no need for a separate 2d_bc SX layer). The 'NODE' requires a nominal storage amount in the “Len_or_NA” attribute, in addition infill 'SX' into the "Conn_1D_2D" attribute to connect the 1d pump to the 2D domain. SX connections are required at connections to 2D domains to transfer water from the 1D node to the 2D. Without the SX connection, water will build up within the node and cause an instability. See the example below.<br>