Difference between revisions of "Tutorial M01 Time Series Plot Output QGIS"

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= Introduction =
 
= Introduction =
 
QGIS is used to create time series plot outputs. Two types are described:<br>
 
QGIS is used to create time series plot outputs. Two types are described:<br>
:*2d_po line object - records average water level (_H) and flow (Q) across the line; and
+
:*2d_po line object - records flow (Q_) across the line; and
:*2d_po point object - records water level (_H) and velocity (_V) in the cell where the point falls into.
+
:*2d_po point object - records water level (H_) and velocity (V_) in the cell where the point falls into.
 
<br>
 
<br>
  
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<li>In the Run ID box write 'M01_001'.  
 
<li>In the Run ID box write 'M01_001'.  
 
<li>Tick the 'Lines' Geometry Type and hit 'OK'.  
 
<li>Tick the 'Lines' Geometry Type and hit 'OK'.  
<li>The '''2d_po_M01_001_L.shp''' appears in the Layers panel.<br>
+
<li>The '''2d_po_M01_001_L''' appears in the Layers panel.<br>
 
</ol>
 
</ol>
 
Digitise a plot output line from left to right looking downstream. The direction of the line is important, the opposite direction would produce negative values:
 
Digitise a plot output line from left to right looking downstream. The direction of the line is important, the opposite direction would produce negative values:
Line 19: Line 19:
 
<li>Digitise a line from left to right looking downstream across the floodplain and channel.   
 
<li>Digitise a line from left to right looking downstream across the floodplain and channel.   
 
<li>Populate the attribute table as follows:  
 
<li>Populate the attribute table as follows:  
:* Type = H_Q_
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:* Type = Q_
:* Label = Location1
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:* Label = Loc1_L
 
<li>Toggle the editing off to save the edits.<br>
 
<li>Toggle the editing off to save the edits.<br>
 
<br>
 
<br>
[[File:Animation_M01_PO_01d.gif]]<br>
+
{{Video|name=Animation_M01_PO_01f.mp4|width=1261}}<br>
 
<br>
 
<br>
 
</ol>
 
</ol>
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<li>In the Run ID box write 'M01_001'.  
 
<li>In the Run ID box write 'M01_001'.  
 
<li>Tick the 'Points' Geometry Type and hit 'OK'.  
 
<li>Tick the 'Points' Geometry Type and hit 'OK'.  
<li>The '''2d_po_M01_001_P.shp''' appears in the Layers panel.
+
<li>The '''2d_po_M01_001_P''' appears in the Layers panel.
 
</ol>
 
</ol>
 
Digitise a plot output point in the channel where the 2d_po line crosses the channel:
 
Digitise a plot output point in the channel where the 2d_po line crosses the channel:
Line 40: Line 40:
 
<li>Populate the attribute table as follows:  
 
<li>Populate the attribute table as follows:  
 
:* Type = H_V_
 
:* Type = H_V_
:* Label = Location1
+
:* Label = Loc1_P
 
<li>Toggle the editing off to save the edits.<br>
 
<li>Toggle the editing off to save the edits.<br>
 
<br>
 
<br>
[[File:Animation_M01_PO_02d.gif]]<br>
+
{{Video|name=Animation_M01_PO_02e.mp4|width=1261}}<br>
 
<br><br>
 
<br><br>
 
</ol>
 
</ol>
  
 
= Conclusion =
 
= Conclusion =
:*The 2d_po layers were created, containing a line recording water level and flow and point recording water level and velocity.  
+
:*The 2d_po layers were created, containing a line recording flow across the line and point recording water level and velocity.  
 
<br>
 
<br>
 
{{Tips Navigation
 
{{Tips Navigation
 
|uplink=[[Tutorial_M01#2D_Time_Series_Plot_Output | Back to Module 1 Main Page]]
 
|uplink=[[Tutorial_M01#2D_Time_Series_Plot_Output | Back to Module 1 Main Page]]
 
}}
 
}}

Latest revision as of 17:29, 14 August 2023

Introduction

QGIS is used to create time series plot outputs. Two types are described:

  • 2d_po line object - records flow (Q_) across the line; and
  • 2d_po point object - records water level (H_) and velocity (V_) in the cell where the point falls into.


Method

Create 2d_po line layer with the TUFLOW plugin:

  1. Click on the ‘Import Empty File’ symbol from the TUFLOW plugin toolbar.
  2. Select '2d_po' from the Empty Type list.
  3. In the Run ID box write 'M01_001'.
  4. Tick the 'Lines' Geometry Type and hit 'OK'.
  5. The 2d_po_M01_001_L appears in the Layers panel.

Digitise a plot output line from left to right looking downstream. The direction of the line is important, the opposite direction would produce negative values:

  1. Make the layer editable and select ‘Add Line Feature’.
  2. Digitise a line from left to right looking downstream across the floodplain and channel.
  3. Populate the attribute table as follows:
    • Type = Q_
    • Label = Loc1_L
  4. Toggle the editing off to save the edits.



Create 2d_po point layer with the TUFLOW plugin:

  1. Click on the ‘Import Empty File’ symbol from the TUFLOW plugin toolbar.
  2. Select 2d_po from the Empty Type list.
  3. In the Run ID box write 'M01_001'.
  4. Tick the 'Points' Geometry Type and hit 'OK'.
  5. The 2d_po_M01_001_P appears in the Layers panel.

Digitise a plot output point in the channel where the 2d_po line crosses the channel:

  1. Make the layer editable and select ‘Add Point Feature’.
  2. Digitise a point within the channel where the line crosses the channel.
  3. Populate the attribute table as follows:
    • Type = H_V_
    • Label = Loc1_P
  4. Toggle the editing off to save the edits.




Conclusion

  • The 2d_po layers were created, containing a line recording flow across the line and point recording water level and velocity.


Up
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