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=Method=
<li>Copy the GIS layers '''1d_nwk_M07_Pipes_001_L1d_nwk_FMT_M02_Pipes_001_L.shp''' and '''1d_nwk_M07_Pits_001_P1d_nwk_FMT_M02_Pits_001_P.shp''' within '''Module_data\Module_07Module_02\Pipe_Network''' into the '''TUFLOW\model\gis''' folder.
<li>Open the layer '''1d_nwk_M07_Pipes_001_L1d_nwk_FMT_M02_Pipes_001_L''' in QGIS. This contains polylines representing the culverts that make up the pipe network.
<li>A number of the attributes within the '''1d_nwk_M07_Pipes_001_L1d_nwk_FMT_M02_Pipes_001_L''' layer have not been populated. Toggle Editing for the layer and add the following attributes to all objects leaving all other attributes unchanged. Make use of the ‘'Update All'’ function as previously explained to update all objects at the same time. <br>
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*The number of identical pipes in parallel. <br>
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<li>Open the layer '''1d_nwk_M07_Pits_001_P1d_nwk_FMT_M02_Pits_001_P''' in QGIS. This contains digitised points that represent the pits of the pipe network through which water can transfer to and from the overlying floodplain.
<li>A number of the attributes within the '''1d_nwk_M07_Pits_001_P1d_nwk_FMT_M02_Pits_001_P''' layer have not been populated. Toggle Editing for the layer and add the following attributes to all objects leaving all other attributes unchanged. Again, make use of the ‘Update All’ function in QGIS to update all objects at the same time:
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*Specifying SXL for the ‘Conn_2D’ attribute automatically creates a 2D SX connection at the 2D cell within which the 1D pit is located. In addition, the ZC elevation of the cell will be lowered by the amount specified in the ‘US_Invert’ attribute (0.1m), and the upstream invert of the pit channel set to the lowered 2D cell elevation. This is useful to help trap the water into the pit as it flows overland in the 2D domain. <br>
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<li> Open the layer '''1d_nwk_M04_channels_001_L1d_x1d_FMT_M01_nwk_001_P.shp'''. Note that the pipe network has been digitised to outfall to the watercourse represented within the Flood Modeller Network. We will manually specify the downstream invert levels of Pipe16 and Pipe18 as the discharge point of the pipe network is above the bed level of the watercourse. Use the Info tool and click on each pipe in turn and change the ‘DS_Invert’ attribute for both pipes from -99,999 to 38m.
<li>Save both '''1d_nwk_M07_Pipes_001_L1d_nwk_FMT_M02_Pipes_001_L.shp''' and '''1d_nwk_M07_Pits_001_P1d_nwk_FMT_M02_Pits_001_P.shp'''. </li><br>
<u>'''Pit Inlet Database'''</u>
<li>The Pit Inlet Database has been created and can be found within '''Module_data\Module_07Module_02\Pipe_Network'''. Copy the csv files '''pit_inlet_curves.csv''' and '''pit_inlet_dbase.csv'''’ into a new folder entitled '''pit_dbase''' within the TUFLOW folder.
<li>Open the '''pit_inlet_dbase.csv''' file. The Pit Inlet Database is similar to the Boundary Condition Database in that it references an external source file and relates this to corresponding GIS objects within the model. <br>
The first column contains the name of pit inlet type as referenced in the Inlet_Type attribute that was specified within the '''1d_nwk_M07_Pits_001_P1d_nwk_FMT_M02_Pits_001_P''' layer. The second column contains the name of the source .csv file that contains the depth-discharge curve. The third and fourth columns are the heading labels of the depth and discharge columns respectively in the source .csv file. The fifth and sixth columns are the inlet’s nominated full flow area in m<sup>2</sup> and flow width in m. Section 4.5.112.23 of the 20102017 TUFLOW Manual provides further information on the Pit Inlet Database. <br>
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[[File:M07 pit inlet dbase.png]]<br>
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