Tute M01 Boundaries SAGA: Difference between revisions
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Created page with "<ol> == Introduction == This page details the method for using SAGA to create the GIS based boundary layer files. Once the GIS layers are setup (detailed in this page), these are..." |
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[[File:Tute M01 Saga SnapTo1.png|frame|none]]
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<li>In the snap to dialogue, select the 2d_code_M01_003_R in the left hand pane and move it to the right. Then select Okay. This layer is ready for input into TUFLOW.</li>
[[File:Tute M01 Saga SnapTo2.png|frame|none]]
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[[File:Tute M01 Saga 2d bc 3.png|frame|none]]
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<li>Digitise a line connecting the 4 vertices in the location show below. At each vertex, left click to create a vertex on the line, to finish the line use the right mouse button. Right click on the layer in the workspace and un-check the "edit selected shapes" option.</li>
[[File:Tute M01 Saga 2d bc 4.png|frame|none]]
<li>Navigate to the attribute tab of the object properties window. Enter the following data:
*Type = QT
*Name = FC01 (that is FC Zero One).
The type "QT" designates this as flow ("Q") versus Time ("T") boundary. As per the window below.</li>
[[File:Tute M01 Saga 2d bc 5.png|frame|none]]
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<li>At the downstream boundary, add another shape connecting the four vertices shown below.<br>
In the attributes window set the following:<br>
*Type = HQ
*b = 0.01
The remaining attributes are to be left blank or with the default value of 0 (including the name).
The type "HQ" designates this as a Water Level ("H") versus Flow ("Q") boundary. This is a stage-discharge boundary condition. If a Name is specified, the user must define this stage-discharge relationship in the boundary database. In this case a water surface slope value is specified via the "b" attribute, this value of 0.01 is in metres per metre and corresponds to a 1% water surface slope. TUFLOW will automatically create a stage-discharge curve flow this location, based on the underlying topography, roughness and specified water surface slope.</li>
[[File:Tute M01 Saga 2d bc 6.png|frame|none]]
<li>In the data tab, right click on the 2d_bc_M01_003_L layer and select "Save".</li>
[[File:Tute M01 Saga 2d bc 7.png|frame|none]]
===2d_sa type boundary===
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