View source for FM Tutorial M02 QGIS GPKG Flood Modeller1D/ESTRY 1D Link

=Introduction=

This page describes the method in QGIS for linking TUFLOW 1D ESTRY networks to a 1D river channel represented within Flood Modeller. Firstly, a pipe network represented in ESTRY will be linked to Flood Modeller using an "X1DH" link. The Flood Modeller 1D network will then be extended downstream by connecting it to an ESTRY river network using an "X1DQ" link.

=Method=
<ol>
<li> Open the layers '''1d_x1d_FMT_M01_nwk_001_P''', '''1d_x1d_FMT_M01_nodes_001_P''', and '''1d_nwk_FMT_M02_Pipes_001_L''' in QGIS. 
<li>Observe that Pipe16 and Pipe18 in the layer '''1d_nwk_FMT_M02_Pipes_001_L''' representing the pipe network have been snapped to node “FC01.11” of the layer '''1d_x1d_FMT_M01_nodes_002_P'''.  As an additional node hasn’t been manually added the Flood Modeller-ESTRY link at this location is assumed to be an “X1DH” link. If you open the attribute table you will be able to see that the <b>Conn_1D_2D</b> attribute for “Pipe16” and “Pipe18” has been left blank as an “X1DH” link is used by default and therefore doesn’t need to be specified.  
<li>Open the Flood Modeller network (.DAT) file  '''FMT_M01_002.dat''' in the Flood Modeller Pro interface. Observe that the updated network file terminates at a stage-time boundary unit named “DSBDY”. This does not need to contain any time-varying data as this data will be overridden by the water levels provided by ESTRY. 
<li>Open the layers'''1d_x1d_FMT_M01_nodes_002_P.shp''', '''1d_bc_FMT_m02_001_P.shp''', and '''1d_nwk_FMT_M02_channels_001_L.shp''' within QGIS. These layers are located within the '''Module_data\Module_02\Creek ''' folder.
<li>Drag and drop the GIS layers '''1d_x1d_FMT_M01_nodes_002_P.shp''', '''1d_bc_FMT_m02_001_P.shp''', and '''1d_nwk_FMT_M02_channels_001_L.shp''' into the project GeoPackage file '''FMT_M01_002.gpkg''' in the Browser Panel. 
<li>Close the three GIS layers in the Layers Panel and reload them from the project GeoPackage file '''FMT_M01_002.gpkg'''. 
<li>The GIS layer '''1d_nwk_FMT_M02_channels_001_L''' represents the open channel ESTRY network downstream of the Flood Modeller network. A stage-time boundary named "DS_BC" has been set up at the downstream end of the ESTRY network in layer '''1d_bc_FMT_m02_001_P'''.
<li>Observe that an additional node "DSBDY" is present within the updated Read GIS ISIS Nodes layer '''1d_x1d_FMT_M01_nodes_002_P''' at the downstream end of the Flood Modeller network. 

<br>{{Video|name= FMP ESTRY 1D Link Module 02 QGIS GPKG Part1.mp4 |width=1123}}<br>

<li>Open the layer '''1d_xs_FMT_M02_creek_001_L''' within QGIS. It is located within the '''Module_data\Module_02\Creek''' folder.
<li>Drag and drop the layer into the project GeoPackage file '''FMT_M01_002.gpkg''' in the Browser Panel. Close the layer in the Layers Panel.
<li>Reload the layer '''1d_xs_FMT_M02_creek_001_L''' within QGIS from the project GeoPackage file. Turn on Toggle Editing mode and open Field Calculator. Select the field "Source" from the "Update Existing Field" dropdown and enter the expression <b>'..\\xs\\' || "source"</b> to prepend "..\\xs\\" to all rows for this field. This will ensure that the locations of the csv files are correctly referenced. 
<li>Create a new folder entitled '''xs''' in the '''TUFLOW\model''' folder. Copy the csv files listed below from the '''Module_data\Module_02\Creek''' folder into the newly created '''TUFLOW\model\xs''' folder. These csv files will be used to define the geometry of the river channel cross sections. 
*ds_weir.csv
*ds1.csv
*ds2.csv
*ds3.csv
*ds4.csv
*ds5.csv
*ds5_weir.csv
<li>Copy the csv file '''Weir_HT.csv''' from the '''Module_data\Module_02\Creek'''folder to the '''TUFLOW\bc_dbase''' folder. This csv file contains the stage time data that will be applied at the downstream boundary node 'DS_BC'. A constant stage value of 35.5m AOD has been applied .
<li>An additional row needs to be added to '''bc_dbase_FMT_M01.csv''' to apply the stage-time values from '''Weir_HT.csv'''. The revised bc_dbase should look like the figure below:

<br>
[[File:Bc dbase FMT M01 update.jpg||1200px]]<br>
<br>

<br>{{Video|name= FMP ESTRY 1D Link Module 02 QGIS GPKG Part2.mp4 |width=1123}}<br>

<li>As there is gap between the final node of the Flood Modeller network and the start of the ESTRY network a connector "X" type channel type has been added to connect them. This must be digitised from the ESTRY channel (from the first vertex on the polyline) to the Flood Modeller node.
<li>To complete the "X1DQ" link a manually created ESTRY node must be snapped to the Flood Modeller node and have a "Conn_1D_2D" attribute of "X1DQ" specified. To do this, import an empty 1d_nwke_empty_P.gpkg from within the FMT_tutorial\FMT_M02\TUFLOW\model\gis\empty folder.
<li>Save the empty layer as '''1d_nwke_X1DQ_P''' in the '''TUFLOW\model\gis folder'''. Drag and drop this layer into the project GeoPackage file '''FMT_M01_002.gpkg''' in the Browser Panel.
<li>Close the layer '''1d_nwke_X1DQ_P''' within QGIS and then reload it from the the project GeoPackage file '''FMT_M01_002.gpkg'''. 
<li>Turn on Toggle Editing for the layer '''1d_nwke_X1DQ_P''' and add the attribute values shown in the table below. Save the layer. 
{| align="center" class="wikitable" width="25%"

! style="background-color:#005581; font-weight:bold; color:white;"| Attribute
! style="background-color:#005581; font-weight:bold; color:white;"| Value
|-
| ID || DS2
|-
| Type || Node
|-
| Conn_1D_2D || X1DQ
|}

<br>{{Video|name= FMP ESTRY 1D Link Module 02 QGIS GPKG Part3.mp4 |width=1123}}<br>

=Conclusion=

The ESTRY pipe network for the proposed development has been connected via an "X1DH" link to discharge via two pipes into the Flood Modeller network by snapping together the nodes in a 1d_nwk_L layer to a node in the 1d_x1d_P layer. A 1d_nwk_L layer has been added to represent the open channel network downstream of the Flood Modeller network in ESTRY. The cross section data for this open channel network has been defined by adding a 1d_xs_L layer with links to the source csv files at every cross section location. A connector "X" type channel and a 1d_nwke_P layer have been added to connect the ESTRY and Flood Modeller open channel networks via an "X1DQ" link. Please return to the main page of the[[Flood Modeller Tutorial Module02_Provisional#Modify Simulation Control Files | Flood Modeller Tutorial 2]].


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