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===Flood Modeller 1D/1D Link===
TUFLOW models can also be configured with Flood Modeller for dynamically linked 1D pipe network 2D overland flow modelling. The main driver for this feature is for Flood Modeller - TUFLOW models to utilise the powerful pipe network and manhole modelling capabilities of TUFLOW (see Section 5.12) and be able to link these networks into a Flood Modeller river model.<br>
Flood Modeller and TUFLOW (ESTRY) nodes will be considered linked if:<br>
<ol>
1. An ESTRY node in a 1d_nwk layer, and a Flood Modeller node in a Read GIS ISIS Nodes or Read GIS ISIS Network layer are snapped.
2.<li> TheAn ESTRY node hasin a 1d_nwk Conn_1D_2Dlayer, attributeand ofa eitherFlood "X1DH"Modeller node in a Read GIS ISIS Nodes or "X1DQ"Read GIS ISIS Network layer are snapped.</li>
<li> The ESTRY node has a 1d_nwk Conn_1D_2D attribute of either "X1DH" or "X1DQ".</li>
::(i) If Conn_1D_2D is blank then “X1DH” is assumed.
(ii) A connector "X" channel type can be used to connect the end of the linked ESTRY channel to the ESTRY node snapped to the Flood Modeller node if the end of the ESTRY channel and the snapped Flood Modeller /ESTRY nodes are not in the same location.
::(iiiii) NoteA thatconnector "X" channel type can be used to connect the upstreamend andof downstreamthe invertslinked forESTRY channel to the ESTRY node linkedsnapped to the Flood Modeller shouldnode beif setthe toend -99999 unlessof the nodeESTRY ischannel alsoand beingthe usedsnapped toFlood setModeller the/ESTRY invertsnodes ofare channelsnot snappedin tothe same itlocation.
3.::(iii) AnNote "X1DH"that linkthe meansupstream aand Flooddownstream Modellerinverts 1D water level is being applied atfor the ESTRY node (ie.linked to Flood Modeller sendsshould ESTRYbe aset waterto level-99999 andunless ESTRYthe sendsnode backis aalso +/-being flowused to Floodset Modeller)the inverts of channels snapped to it.
4.<li> An "X1DQX1DH" link means a Flood Modeller inflow/outflow1D water level is being applied at the ESTRY node (ie. Flood Modeller sends ESTRY a +/-water flowlevel and ESTRY sends back a water+/- levelflow to Flood Modeller). </li>
<li> An "X1DQ" link means a Flood Modeller inflow/outflow is being applied at the ESTRY node (ie. Flood Modeller sends ESTRY a +/- flow and ESTRY sends back a water level). </li>
5.<li> An ESTRY X1DH (the default) would be used for most Flood Modeller ESTRY links. An X1DQ might be more appropriate where a Flood Modeller model stops and flows into an ESTRY model.<br>
</ol>
Generally, an ESTRY timestep will be smaller than the Flood Modeller timestep. In these cases, the total volume is accumulated over all ESTRY timesteps within a Flood Modeller timestep, and applied to the Flood Modeller model as a discharge by dividing the volume by the Flood Modeller timestep.
The mass balance _MB1D.csv file includes four new columns:
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