Structures Editor
==========================
The structures editor is used to set up the data for the HYSTRUCT.DAT file.
This section will describe how to set up each of the different types of hydraulic structures.
.. note:: An advanced tutorial for modeling hydraulic structures and culverts is available on the Gila Self-Help Tutorials.
|tut|
.. |tut| raw:: html
Gila Self-Help Tutorials
.. image:: ../../../img/Widgets/structures.png
Channel to Channel Structure
----------------------------
Culvert Type:
- Channel to Channel
- Generalized Culvert Equation
This structure will simulate discharge through a box culvert.
This example has a box culvert that is longer than the grid element.
The channel segments are split up to allow for the width of the roadway.
1. Click the Add
Structure button.
.. image:: ../../../img/Hydraulic-Structure-Editor/Hydrau003.png
2. Digitize a culvert
by clicking on the two blue left bank elements that represent the beginning and end of the hydraulic structure.
3. Click upstream first and downstream second.
There are small arrows on the channel that show the flow direction.
4. The structure line
also has an arrow to show flow direction.
5. Do not use a structure on the magenta right bank lines.
Culverts are only assigned to the left bank nodes.
.. image:: ../../../img/Hydraulic-Structure-Editor/Hydrau004.png
6. Click
Save.
.. image:: ../../../img/Hydraulic-Structure-Editor/Hydrau005.png
7. Fill the
widget form.
8. In the generalized
culvert equation, conduit with is used to represent the culvert height or diameter.
.. image:: ../../../img/Hydraulic-Structure-Editor/Hydrau002.png
9. Fill the
table.
.. image:: ../../../img/Hydraulic-Structure-Editor/Hydrau006.png
10. Click Schematize
button to write the data to the schematic layers.
.. image:: ../../../img/Hydraulic-Structure-Editor/Hydrau007.png
Floodplain to Floodplain Structure
----------------------------------
Culvert Type:
- Floodplain to Floodplain
- Rating Table
This example will model a culvert system between two floodplain nodes.
The invert elevation of the inlet node is set by the grid element elevation.
.. image:: ../../../img/Hydraulic-Structure-Editor/Hydrau008.png
1. Click the Add
Structure button.
.. image:: ../../../img/Hydraulic-Structure-Editor/Hydrau009.png
2. Digitize a culvert
by clicking on two cells closest to the inlet and outlet on the map.
3. Use the elevation
values to make sure that the invert elevations are correct.
.. image:: ../../../img/Hydraulic-Structure-Editor/Hydrau010.png
4. Click
Save.
.. image:: ../../../img/Hydraulic-Structure-Editor/Hydrau011.png
5. Fill in the data
on the Structure Editor and the Table Editor.
6. No need for culvert
geometry because this culvert uses a rating table.
7. No need for reference
elevation because this culvert discharge starts when the water enters the upstream grid element.
.. image:: ../../../img/Hydraulic-Structure-Editor/Hydrau012.png
8. Fill the
rating table.
.. image:: ../../../img/Hydraulic-Structure-Editor/Hydrau013.png
9. Click Schematize
to write the data to the schematic layers.
.. image:: ../../../img/Hydraulic-Structure-Editor/Hydrau007.png
Floodplain to Channel Structure
-------------------------------
This example shows a culvert that connects a basin to a channel.
1. Click the Add
Structure button.
.. image:: ../../../img/Hydraulic-Structure-Editor/Hydrau009.png
2. Digitize a culvert by clicking on two cells closest to the inlet and outlet on the map.
The outlet should be assigned to a blue channel node.
3. Use the grid
elevation values and channel invert to make sure that the invert elevations are correct.
.. image:: ../../../img/Hydraulic-Structure-Editor/Hydrau014.png
4. The culvert is assigned to the channel cross section.
That is why the feature must be applied to a left bank channel node.
.. image:: ../../../img/Hydraulic-Structure-Editor/Hydrau015.png
5. Click
Save.
.. image:: ../../../img/Hydraulic-Structure-Editor/Hydrau011.png
6. In this case the stage of the water in the channel may cause submergence.
The tailwater switch should be set to Reduced Discharge and upstream flow allowed.
7. The culvert length is 118ft.
8. This is a pedestrian crossing so the culvert height must be at least 8 ft.
.. image:: ../../../img/Hydraulic-Structure-Editor/Hydrau016.png
9. The width
of the structure is approximately 12 ft.
10. There are
30-degree wingwalls.
.. image:: ../../../img/Hydraulic-Structure-Editor/Hydrau017.png
11. Fill the table form.
.. image:: ../../../img/Hydraulic-Structure-Editor/Hydrau018.png
12. Fill in
Rating Table data.
.. image:: ../../../img/Hydraulic-Structure-Editor/Hydrau019.png
13. Click Schematize to
write the data to the schematic layers.
.. image:: ../../../img/Hydraulic-Structure-Editor/Hydrau007.png
Bridge
------
Bridge parameters can be defined for a structure.
.. image:: ../../../img/Hydraulic-Structure-Editor/Hydrau020.png
The USGS bridge tables are used to define the flow though a bridge with bridge geometry and discharge coefficients.
.. note:: See `Bridge tutorial and Bridge guidelines `__ for a detailed guide.
.. image:: ../../../img/Hydraulic-Structure-Editor/Hydrau021.png
Import Rating Tables
--------------------
1. Click the
Import Rating Tables button.
2. Select all of the
rating table files and open them.
3. The files must
have the same name as the structure.
4. The rating table data is
Depth (ft or m) and Discharge (cfs or cms).
5. The columns
can be space or tab delimited.
6. Do not put
a header in the rating table data file.
.. image:: ../../../img/Hydraulic-Structure-Editor/Hydrau022.png
Culvert Equation
----------------------