1D Pumps: Difference between revisions

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Revision as of 12:36, 2 March 2026 view source Emilie Nielsen (talk \| contribs) Administrators 6,425 edits →Depth Discharge Database ← Older edit		Latest revision as of 13:58, 21 April 2026 view source Emilie Nielsen (talk \| contribs) Administrators 6,425 edits →2D-2D Configuration
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Line 3: =Pump Attributes= A pump needs to first be digitised in a 1d_nwke layer. The direction of the polyline must go from inlet to outlet as a pump is unidirectional ~~(see Section 5.9.2.1 Pumps)~~. The attributes required for a pump in your 1d_nwk layer can be found in the <u>[https://docs.tuflow.com/classic-hpc/manual/latest/ TUFLOW Manual]</u>.<br> In the 1d_nwk layer, the following attributes are required:<br> #ID = ID of the pump channel. <br> Line 16: =2D-2D Configuration= ~~Because~~As 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><tt~~u>.~~</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~~Unlike ~~'NODE'~~NODEs ~~requires~~connected ato ~~nominal~~pipes ~~storage~~and ~~amount in the “Len_or_NA” attribute~~channels, inNODEs ~~addition infill 'SX' into the "Conn_1D_2D" attribute~~connected to ~~connect~~zero ~~the~~length 1dpumps ~~pump to~~require the 2Dfollowing 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.attributes:<br> #Type = "NODE". <br> #Len_or_NA = The 'NODE' requires a nominal storage amount. This can be estimated from the pipe length and diameter attached to the pump. <br> #US_Invert = The upper elevation of the automatically created NA table. Make sure these values are set higher than the expected water levels at the intake and outlet of the pump. <br> #DS_Invert = The bottom elevation of the pump nodes. As the pump does not create automatic nodes, the bottom elevation of the pump nodes must be specified. Note that this does not change the intake or outlet elevations of the pump, but only sets the bottom elevation of the nodes for storing water. <br> #Conn_1D_2D = Set to "SX" to connect the 1D pump with the 2D domain. Without the SX connection, water will build up within the node and cause instabilities. <br> See the example below.<br> [[File:1d_nwk_pump_SX_node.PNG\|border\|300px]] <br>▼ ▲[[File:1d_nwk_pump_SX_node.~~PNG~~png\|~~border\|300px~~600px]] <br> A simple 2D-2D pump configuration will look like the below schematisation. <br> [[File:Pump_schematic.PNG~~\|border~~\|600px]] <br> =1D-2D Configuration=