Tutorial M04 Results QGIS update V2 draft

Introduction

QGIS is used to view the head loss across the 2D bridge with the TUFLOW Viewer V2. For viewing of the 2D map results, see Module 1.

Method

Plot head loss across the 2D bridge:

1. Open the Map Outputs and Plot Output results, either:
   • Within the QGIS Browser Panel drag the following layers into the QGIS workspace, or

   • Module_04\TUFLOW\results\M04_5m_001.xmdf > loads the map output mesh results
   • Module_04\TUFLOW\results\plot\M04_5m_001.tpc > loads the time series output results

   • In File Explorer, navigate to the files above and drag and drop them into the QGIS workspace.
2. Select the M04_5m_001 file in the Layers panel and click on the 'TUFLOW Viewer Plot Window' icon. The plot widget will open.
   
3. Open the Section Plot tab, select the Data Type 'water level' and use the 'Draw' tool to see head loss across the 2d_lfcsh:
   
   
   
   

   Review structure group outputs:

   1. Select the M04_5m_001_Plot_L file in the Layers panel and click on the 'TUFLOW Viewer Plot Window' icon. The plot widget will open.
      To plot the structure flow and the upstream and downstream water levels, use the 'Time Series' tab and select the Data Types 'Structure Flow', 'u-s Structure Water Level' and 'd-s Structure Water Level'. Use the 'Selection' tool, to select the 2d_po line, which will display the data.
      Note: Right click on the graph to select 'Show current time'. To display a graph on a secondary axis, select a specific graph and click on 'Move to secondary axis'.
      
      

      
      

   2. Navigate to Module_04\TUFLOW\results\plot\csv and open M04_5m_001_SHmx.csv. It contains a summary of each structure when the upstream water level reaches its maximum. The output columns include:

      • Flow, area and average velocity for below and above deck.
      • Total flow, area and average velocity for the whole structure.
      • Upstream and downstream water levels and the head drop across the structure (i.e. upstream minus downstream water level).
      • The time this data was recorded (i.e. the time the upstream water level peaked).
        

      The structure group output associates the 2d_po points and line with the same Label 'Bridge':
      
      
      

   Conclusion

   • The plot cross-section tool was used to view the head loss across the layered flow constriction.
   • A plot was made showing structure flow and the upstream and downstream water levels at layered flow constriction.
   • The _SHmx csv file was inspected showing a summary of the structure when the upstream water level reached its maximum.
   • For further functionality, see TUFLOW Viewer documentation.

   
   

   Up
   Back to Module 4 Main Page