NHI Course 135095 Lesson 7 Demonstration: Results Review
NHI Course 135095 Lesson 7 Demonstration: Results Review
In this video, the steps of reviewing an SRH-2D simulation and the results in SMS are demonstrated and the available tools that can help with review are highlighted. FHWA’s model review spreadsheet is also presented.
Content
0.024 -> In this video,
7.86 -> we will demonstrate the steps to review an SRH-2D
model and how to use SMS to visualize results.
16.5 -> FHWA has created a model review spreadsheet
19.62 -> to help provide steps for users
reviewing SRH-2D models in SMS.
24.9 -> We have opened a copy this spreadsheet.
27.18 -> This can be found in the
Input folder for this lesson.
32.94 -> This Model review tab has a
list of over 100 items you
36.72 -> may wish to check during your review of a model.
39.48 -> For Example, Terrain Data, Mesh, Boundary
Conditions, Structures, and so on.
53.88 -> There are other tabs for specific
review items with space to make notes,
58.56 -> provide detailed comments and add images.
61.92 -> These other tabs also show
examples of common issues.
65.34 -> For example, for Topography
there is a section for notes
69.42 -> and graphics to the right showing common issues.
75.54 -> Next let’s do a quick review of the model in SMS.
81.36 -> First we’ll look at the mesh.
83.34 -> We’ll turn on the elements, and turn off the
contours and the image to better see the mesh.
91.26 -> Next, let’s zoom in and pan to review the size
and shape of the elements throughout the model.
109.38 -> Next we’ll turn on the mesh
quality option as well.
117.96 -> Remember, mesh quality is just a guideline and
you don’t need to remove all of these warnings.
123.9 -> For this mesh we see mostly element area change
at the mesh transitions, which should be OK.
136.98 -> We can also create an ARR plot at this point.
148.68 -> Note that all points are above the red
line indicating a good quality mesh.
156.3 -> Next let’s review the elevations.
160.14 -> First let’s turn the elements off
and turn the contours back on.
166.92 -> Now we’ll look at the
elevation contours in general.
175.98 -> Turning the lighting on can
help visualize the elevations.
194.1 -> It is also helpful to use the rotate
tool to review the mesh elevations.
199.56 -> Note that the mesh elevations capture
the channel and other critical features.
211.26 -> It is a good idea to review
the boundary conditions.
214.62 -> We’ll switch to the Map Data
and turn on the BC coverage.
221.28 -> We’ll double-click on both
the upstream and downstream
224.4 -> BCs to verify they are accurate and reasonable.
248.46 -> Next we’ll look at the simulation
plots created when the model was run.
253.44 -> These can be accessed by right-clicking
255.66 -> the simulation and selecting
Tools | View Simulation plots.
261.78 -> These are the same plots that appear in the
Simulation Run Queue while the model is running.
270.06 -> Let’s look through the plots.
272.58 -> First there is NetQ plot.
274.98 -> Recall that the NetQ should converge to zero
when the model has reached steady state.
280.86 -> The Mass Balance plot should approach zero.
284.58 -> The Wet Elements plot should level out indicating
287.4 -> the storage has filled and the
model has reached steady state.
291.72 -> The Monitor point and Monitor line plots
294 -> can be used to review model
results at specific locations.
298.38 -> These plots can also indicate steady state
301.02 -> convergence if the values flatten out
and stabilize at a constant value.
305.88 -> They can indicate instability if the
plots oscillate or do not converge.
314.64 -> Next let’s review the datasets.
317.16 -> First we’ll look at the velocities.
318.72 -> Let’s turn on the vectors and set the vector
placement to “On a Grid” at 15 pixels.
336.96 -> We’ll zoom into view the velocities
especially at the bridge.
360 -> Now let’s review the water surface elevations.
362.58 -> We should be sure the data values seem reasonable.
381.24 -> Now let’s look at the Contour options.
383.76 -> Note the different options for range,
contour intervals, legend and labels.
408 -> If we click on the Color Ramp button,
we can set color palette options.
412.92 -> Hue ramp is the default, but if we select
User Defined, the FHWA palettes are available.
435.78 -> Another useful tool is the Data set toolbox
which is accessed from the Data menu.
443.4 -> The most useful tool is the data calculator.
446.1 -> With this tool you can perform arithmetic
calculations to create new datasets.
452.04 -> As an example, we can create a new dataset
for unit flow by selecting the velocity data
457.68 -> set and multiplying by the depth dataset.
469.62 -> We’ll name this new dataset “unitq”.
478.74 -> Note the new dataset in in Mesh Data.
483.42 -> The Dataset Toolbox also has tools for
comparing datasets, filtering, and so on.
493.56 -> We can use an Observational coverage to create
plots of our solution datasets along arcs.
500.22 -> To do so, first we’ll create
an Observation coverage.
506.76 -> Next we create arcs where we
want to extract solution data.
512.22 -> Now let’s create an arc along
the centerline of the channel.
524.7 -> Now we can create an Observation
Profile plot using the Plot Wizard.
529.68 -> We select Display | Plot Wizard, or
simply click on the plot Wizard macro.
536.82 -> In this window we select Observation
Profile as the plot type.
541.62 -> Next we select the arcs we want to plot.
544.74 -> In this case there is just one arc.
547.8 -> We’ll then click on “Specified datasets”
and select which datasets to plot.
552.78 -> Let’s choose the “Z” and the
Water Elevation datasets.
563.94 -> This creates a plot along the arc
for the two datasets selected.
568.14 -> We can do this along any arc we create.
573.96 -> We can also use the Observation coverage to
extract solution data at specific points.
579.84 -> To do this, we can create points in this coverage.
591.42 -> Then we can double-click on any point to
bring up the Observation Coverage dialog.
597.9 -> In this top section, we need to
set up measurements to specify
601.62 -> from which dataset the values will be extracted.
604.08 -> For example, we could create a measurement
called “WSE”, by selecting “2D mesh”
614.04 -> and the water elevation dataset.
618.54 -> The extracted solution at this point
will show up here under “Computed Value”.
623.64 -> This feature was created to compare computed
values to observed values for calibration,
628.8 -> but it can be used to
extract data at any location.
635.64 -> Similarly, we can extract flow
values across an arc in the coverage.
640.44 -> Let’s create an arc across our flow at the bridge.
645.36 -> Now we double-click on this
arc to launch the same dialog.
651.96 -> For arcs, we create a
measurement called Flow or Flux.
656.82 -> We select 2D mesh, then we select
depth for the scalar dataset,
662.64 -> and leave velocity as the vector dataset.
667.32 -> The flow across this arc then
shows up under Computed Value.
681.48 -> Next let’s create a flow trace animation.
685.2 -> First we zoom into the area of
the model we want to include.
689.58 -> Then we select Data | Film Loop.
693.42 -> In this dialog, we can specify the
name and location for the .avi file.
699.72 -> We then select the “Flow
trace” option and click Next.
703.74 -> In this dialog we can specify time options.
707.4 -> Let’s just accept the defaults.
710.16 -> The next dialog allows us to change the options
713.4 -> for the light particles that are
placed in the velocity field.
718.44 -> We can play with these, but we
usually just select the defaults.
723.12 -> Finally, we have a dialog
for specifying video options.
727.8 -> Again, we just leave the
defaults and select Finish.
731.52 -> SMS will create the animation
in the location we specified,
735.18 -> and play it in the video player included with SMS.
739.8 -> This animation helps us visualize
the vector field for the solution.
749.04 -> Lastly, let’s show how to display an image on our
mesh using the Texture mapping feature in SMS.
757.2 -> We select Display Options and
select the General options.
762.72 -> Under Texture Mapping we select 2D Mesh.
773.28 -> Now when we rotate the view we can now
see the image draped on the surface.
780.78 -> Shading can be edited under the Lighting
options to give the image a more realistic look.
792.66 -> This concludes our demonstration for
reviewing and visualizing SRH-2D model in SMS.
799.44 -> The exercise that follows will give you
additional information and practice.
Source: https://www.youtube.com/watch?v=V95qeal6aaw