TUFLOW 1D Flood Modeller Connectivity: Difference between revisions

An ESTRY X1DH (the default) would be used for most Flood Modeller ESTRY links where TUFLOW is discharging into Flood Modeller. The discharge will be applied to the Flood Modeller 1D model as a lateral inflow. The Flood Modeller 1D node on the receiving end of an X1DH connection must be a channel unit (eg, River, Interpolate, Replicate or Conduit) and must not be the end node of a reach (ie, distance to next cross section of zero). This is commonly used when representing a pipe network within ESTRY which discharges to an open channel represented in Flood Modeller as per Figure 1.

 

 

An X1DQ might be more appropriate where a Flood Modeller model stops and flows into an ESTRY model. The water level calculated by TUFLOW is applied as a time-varying head boundary in Flood Modeller. The Flood Modeller 1D node on the end of an X1DQ connection must be an HTBDY unit. This does not need to contain any data as this data will be overridden by the water levels provided by TUFLOW.

==Building a TUFLOW-Flood Modeller 1D-1D Connection==

Flood Modeller and TUFLOW will be considered linked if 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 together (see Figure 1). Make sure the 2 nodes are snapped, or that a snap tolerance is being used. The ESTRY node should have a 1d_nwk Conn_1D_2D attribute of either "X1DH" or "X1DQ". If Conn_1D_2D field is blank then “X1DH” is assumed (see Figure 2). Note that the upstream and downstream inverts for the ESTRY node linked to Flood Modeller should be set to -99999 unless the node is also being used to set the inverts of channels snapped to it.

 

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. In this case it is important that the X-connector is drawn from the ESTRY channel (ie, the first vertex on the polyline) to the ESTRY node which is snapped to the Flood Modeller node (see Figure X). The Flood Modeller node label in the 1d_x1d_isis layer should match that within the Flood Modeller network.