SMS:Floodway Delineation Workflow: Difference between revisions

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SMS has the ability to delineate a floodway. Certain datasets and project features are required in order to complete this process.
SMS has the ability to delineate a floodway. Certain datasets and project features are required in order to complete this process.
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!style="text-align:left;"|Required data and project features.
!style="text-align:left;"|Required data and project features.
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:*Geometry – 2D mesh, UGrid, or scatter set.
:*Geometry: 2D mesh, UGrid, or scatter set.
:*Depth and velocity datasets for the given geometry.
:*Depth and velocity datasets for the given geometry. These can be generated from any model.
:*Defined centerline of the river or channel.
:*Defined [[SMS:1D Hyd Centerline Coverage|centerline]] of the river or channel.
:*A defined cross section coverage in the given area.
:*A defined [[SMS:1D Hyd Cross Section Coverage|cross section coverage]] in the given area.
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To delineate a floodway in SMS, use the following steps:
To delineate a floodway in SMS, use the following steps:
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!style="text-align:left;"|1. Load data files.
!style="text-align:left;"|1. Use the Floodway tool.
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<blockquote>
:# In the Project Explorer, right-click on the 1D-Hyd Centerline coverage and select [[SMS:Floodway_Delineation#Floodway_Dialog|'''Floodway''']].
{{SMS Import Data Workflow}}
:# In the [[SMS:Floodway_Delineation#Floodway_Dialog|''Floodway'']] dialog, set the floodway parameters:
</blockquote>
:#* Select the geometry containing the desired depth and velocity datasets.
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:#* Select the depth and velocity datasets to use.
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:#* Set the water surface elevation maximum and minimum rise.
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:#* Set the number of division to use.
!style="text-align:left;"|2.  Select the desired "delta" dataset
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:: The delta dataset with the spatially varied elevation needs to be active to calculate volumes. The dataset can be on of the following:
::* 2D Mesh
::* 2D Scatter Set
::* UGrid/Quadtree
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!style="text-align:left;"|3. Load or define the polygon for the delta volume area.
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: A polygon on an [[SMS:Coverages|map coverage]] is needed to compute volumes.
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!style="text-align:left;"|1. Use an existing map coverage or create a new map coverage.
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<blockquote>
{{SMS new coverage workflow}}
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!style="text-align:left;"|2. Import a polygon for the delta volume.
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:If there is a file with with the define polygon available, use this option.
:# Use the [[SMS:File Menu|''File'' | '''Open''']] menu command to open a file containing a polygon.
:# Depending on the file type, the polygon may need to be converted to a map coverage.
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!style="text-align:left;"|3. Define the polygon for the delta volume.
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:Use this option if a new polygon needs to be defined.
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{{SMS Create Polygons Workflow}}
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!style="text-align:left;"|4. Make certain the ''Volume'' option is on.
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:# Select the [[SMS:File Menu|''File'' | '''Info option...''']] menu command.
:# In the [[SMS:File Menu#Info|''Selection Information'']] dialog, make certain ''Volume'' is turned on.
:#* If desired, unselect quantities that are not of interest.
:#* If wanting to create a file with computed volume, turn on the ''Echo to File'' option.
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!style="text-align:left;"|5. Compute volume in the [[SMS:Select/Delete Data...|''Select/Delete Data'']] dialog.
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:# Using the [[SMS:Map_Module_Tools|'''Select Polygons''']] [[File:SMS Select Polygon Tool.svg|16 px]] tool, select the polygon(s) that covers the computation region.
:# Use [[SMS:Map_Feature_Objects_Menu#General_Commands|'''Select/Delete Data...''']] command in the [[SMS:Map_Feature_Objects_Menu#General_Commands|''Feature Objects'']] menu.
:# Compute volume in the [[SMS:Select/Delete Data...|''Select/Delete Data'']] dialog.
::# Leave the ''Data Domain'' setting as ''Inside polygon(s)''.
::# Select the geometry in the tree on the lower right.
::#*"Elements" if the geometry is a mesh.
::#*"Triangles" if the geometry is a scatter set.
::#*"Cells" if the geometry is a UGrid.
::SMS will switch the module to the geometry module and select the elements, cells, or triangles inside the polygon(s).
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!style="text-align:left;"|6. View results.
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:# The volume will be reported in the [[SMS:Help or Status Window|Status Bar]] at the bottom of the Graphics Window.
:# The ''Echo to File'' option in the [[SMS:File_Menu#info|''Selection Information'']] dialog allows for the results to be saved to a file or displayed in a separate window.


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[[Category:SMS Workflows]]
[[Category:General Workflows]]

Latest revision as of 17:52, 7 November 2019

SMS has the ability to delineate a floodway. Certain datasets and project features are required in order to complete this process.

Required data and project features.
  • Geometry: 2D mesh, UGrid, or scatter set.
  • Depth and velocity datasets for the given geometry. These can be generated from any model.
  • Defined centerline of the river or channel.
  • A defined cross section coverage in the given area.


To delineate a floodway in SMS, use the following steps:

1. Use the Floodway tool.
  1. In the Project Explorer, right-click on the 1D-Hyd Centerline coverage and select Floodway.
  2. In the Floodway dialog, set the floodway parameters:
    • Select the geometry containing the desired depth and velocity datasets.
    • Select the depth and velocity datasets to use.
    • Set the water surface elevation maximum and minimum rise.
    • Set the number of division to use.


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