Autodesk Technologist with Information about Stormwater Management Model (SWMM) for watershed water quality, hydrology and hydraulics modelers (Note this blog is not associated with the EPA). You will find Blog Posts on the Subjects of SWMM5, ICM SWMM, ICM InfoWorks, InfoSWMM and InfoSewer.
Using RDII or RTK or I&I Hydrographs in #INFOSEWER
Using RDII or RTK or I&I Hydrographs in #INFOSEWER – InfoSewer from Innovyze also has the features to model Infiltration/Inflow from Rainfall Events into a Sanitary or Combined Sewershed. There are three parameters, R, T, and K, a Sewershed Area, and a fraction division that divides up the overall R to the individual R's.
Let's consider the following example:
The overall R (percent of Rainfall that turns into Rainfall Dependent Infiltration Inflow): 10%
R1, R2, and R3 are the individual R's.
The fraction division for R1, R2, and R3 is 0.2, 0.4, and 0.4 respectively.
Now, we can calculate the individual R's as follows:
a. R1 = 0.2 * 10 / 100 = 0.02
b. R2 = 0.4 * 10 / 100 = 0.04
c. R3 = 10 - 0.02 - 0.04 = 0.04
So, the individual R's are R1 = 0.02, R2 = 0.04, and R3 = 0.04.
1UH has an overall R (percent of Rainfall that turns into Rainfall Dependent Infiltration Inflow)
a. R1 = Percent R1 * R / 100
b. R2 = Percent R2 * R / 100
c. R3 = R – R1 – R2
Figure 1 shows the Rainfall for InfoSewer
Figure 2 shows the result of using 100 Percent R1, R2 or R3 at a node
Figure 1 - Rainfall for RTK in InfoSewer
Figure 2 - Resultant UH for Nodes with only R1, R2 or R3.
Balaji Ideas for conducting conferences in General from his Twitter Feed
The answer may be a flipped conference, by analogy to a flipped classroom. In a normal classroom, you attend lectures as a group and do homework by yourself. But in a flipped classroom, you watch lecture videos by yourself and discuss homework in a group.
Also, if all talks are designed from the beginning to be posted online, you can have them each be limited to 140 seconds. Post them individually and as a collection. Anyone can then catch up on 10 talks in about 20 minutes. And they may buy a ticket to come in person next year…
ICM InfoWorks by Autodesk Innovyze is a complicated program with many parts and a state-of-the-art 1D and 2D engine. One way to deal with the complexity is to automate complicated or repetitive tasks with SQL and Ruby. In this blog, we will use SQL and Ruby to automate the process of assigning Watershed outlet nodes for ICM SWMM Networks.
What are we hoping to achieve by Combining Ruby with ICM SWMM Networks?
We want to find the outlet ID for the closest node to a Subcatchment in an ICM SWMM Network.
Ruby will use the Geometry tools of ICM to find the closest node.
What is an ICM SWMM Network? It is a Network in ICM that uses SWMM 5.1.015 data and most/many of the tools of the ICM GUI. ICM of course also has InfoWorks Networks.
What am I showing in the Post header image? Autodesk has Subscription versions of ICM (Standard and Ultimate), but I am showing the Thales versions of ICM which are both 32bit and 64bit, and comingled ICM InfoWorks and ICM SWMM Networks. I also use InfoWater Pro (Arc GIS Pro) and InfoSWMM which uses Arc Map and has a direct import into an ICM SWMM Network.
ICM SWMM Network Data in the Autodesk Innvovyze ICM GUI
Why use Ruby for InfoWorks ICM SWMM Networks?
Why Ruby - it is part of ICM and easy to understand with a lot of Modeling features. It is part of Network Menu Commands. You can use a new Script or a past used script so it is easy to find.
What is an InfoWorks ICM SWMM Network?
ICM SWMM uses the SWMM 5.1.015 engine and has most of the UX features of ICM InfoWorks Networks including 2D. A different 1D network and solution of course.
What is an example of Ruby Scripts?
net=WSApplication.current_network
puts 'Running ruby for SWMM Networks'
nodes=Array.new
net.row_object_collection('sw_node').each do |n|
if n.selected?
temp=Array.new
temp << n.id
temp << n.x
temp << n.y
nodes << temp
end
end
net.transaction_begin
net.row_object_collection('sw_subcatchment').each do |s|
if s.selected?
sx = s.x
sy = s.y
nearest_distance = 999999999.9
(0...nodes.size).each do |i|
nx = nodes[i][1]
ny = nodes[i][2]
n_id = nodes[i][0]
distance=((sx-nx)*(sx-nx))+((sy-ny)*(sy-ny))
if distance < nearest_distance
nearest_distance=distance
s.outlet_id = n_id
end
end
else
puts 'You forgot to select anything'
end
s.write
end
puts 'Ending ruby'
net.transaction_commit
Where can I find the Ruby Scripts?
Innovyze has a Github that you can use to copy or download dozens of Ruby and SQL scripts. If registered on our Portal, you can find Salesforce Knowledge Base articles and many other sources of help. at https://github.com/innovyze/Open-Source-Support. SQL and Ruby functionality exist to be used by users with knowledge of programming languages. We provide resources to assist customers in building their scripts through the existing self-help frameworks, including documentation on Ruby, help files, and more recently a wealth of GitHub examples - link above.
How do I use Ruby Scripts?
Easy - Go to the Network Menu and choose Run Ruby Scripts or Recent Ruby Scripts
Do I need to use SQL?
It helps if you have a simple global grid command and you do not want to edit the grid. Here is a simple SQL that sets the SWMM Network OUTLET_ID to blank. You can save the SQL on the project explorer window and click to activate the dialog.
What does each line of the Ruby Script represent and what does it perform for the ICM SWMM Network?
The annotated snippet below shows the steps used in the script. ICM SWMM Networks are sw_ whereas ICM InfoWorks Networks are hw_ (for reference)
net=WSApplication.current_network
# Opens the current network on the ICM Geoplan
puts 'Running ruby for SWMM Networks'
# Tell the user some actions are being done by the script
nodes=Array.new
# Makes a new array - uses swmm nodes or sw_node
net.row_object_collection('sw_node').each do |n|
if n.selected?
temp=Array.new
temp << n.id
temp << n.x
temp << n.y
nodes << temp
end
end
# Save the id, x coordinate, y coordinate to the nodes array of SELECTED Elements
net.transaction_begin
# start finding the nodes to set to the outlet of the subcatchment
net.row_object_collection('sw_subcatchment').each do |s|
# use swmm subcatchments or sw_subcatchment
if s.selected?
# use the SELECTED Elements
sx = s.x
sy = s.y
# use the centroid of the subcatchment
nearest_distance = 999999999.9
(0...nodes.size).each do |i|
nx = nodes[i][1]
ny = nodes[i][2]
n_id = nodes[i][0]
# for each node find the x and y coordinates
distance=((sx-nx)*(sx-nx))+((sy-ny)*(sy-ny))
# compute the node to subcatchment distance
if distance < nearest_distance
nearest_distance=distance
s.outlet_id = n_id
# We have found the closed node and set the outlet ID to the node ID
end
end
else
puts 'You forgot to select anything'
# message to remind ourself we forget to select any nodes or subcatchments
end
s.write
end
puts 'Ending ruby'
# Tell the user some actions were by the script
net.transaction_commit
# commit our new found ID to the current network (ICM SWMM Network)
I'm attaching a YouTube video that explains the previous stages. It is for ICM SWMM Networks, which utilizes SQL to remove or set the SWMM Subcatchment's OUTLET ID to Null and Ruby to determine the closest node to the Subcatchment's centroid and assign it as the OUTLET ID. I made a mistake and ran Ruby without using ICM to pick any items, which resulted in nothing being done, but at least I received a notice about not choosing any components.
Flow Unit - Units of flow measurement (cfs, gpm, mgd,
imgd, afd, L/s, L/m, MLd, m3/h, and m3/d).
Default Diurnal Pattern - Determines which diurnal
pattern will be applied to an EPS simulation when a unique pattern has not been
assigned to an individual manhole(s).
Global Loading Multiplier - Used to assign a
multiplier in which global loadings are to be multiplied. For example, a MAXDAY
EPS model scenario may have a global loading multiplier of 2.5.
Accuracy - Convergence criterion used to signal that
a solution has been found to the nonlinear equations that govern network
hydraulics. Trials end when the relative change in pipe flow rates between two
successive iterations is less than this number. The suggested value is 0.001.
Diurnal Pattern Usage - Select whether the pattern
will linearly interpolate intermediate values (continuous) or evaluate patterns
in a stepwise fashion. Click here to learn more
about pattern representation options.
Default Manhole Sealing Method - Use this to specify
the default Manhole cover type for Normal Manholes. Choose Locked to contain flow inside the manhole structure when the
water level rises above the rim elevation and choose Unlocked if flow is not contained inside the structure and
spills over when the water level rises above the rim elevation. The maximum head
possible in the second case is thus the manhole rim elevation
Maximum number of segments - The maximum number of
segments specifies the maximum number of segments a pipe can be divided into
during a flow routing and quality analyses. The default value is 100 segments
per pipe. The maximum number of segments affects the speed and accuracy of the
hydraulic analysis. The smaller the value the faster the computational
speed.
Minimum Travel Distance - Minimum Travel Distance
is the smallest length that a pipe segment could assume. Pipes shorter than this
value will have only one segment. The default value is 100 ft.
Minimum Travel Time - Minimum Travel Time establishes
the smallest time of travel through a pipe recognized by InfoSewer Travel times
smaller than this number are set equal to it (travel times through pumps are
instantaneous and are not affected by this limit). The default minimum travel
time is 1 second.InfoSewer determines the travel time based on pipe and flow
properties, and uses this computed time step for hydraulic calculations during
an EPS. The user can assign a desired minimum travel time, and this value is
used when calculated travel times are less than the minimum travel time. The
maximum allowable value for the minimum travel time is equal to the smaller
value of report time step and pattern time step. The minimum travel time affects
the speed and accuracy of the water quality analysis (i.e. time of concentration
and source tracing). The larger this value is the faster the computational
speed.
Pumped Flow Conservation - Check this option to set
the gravity main flow downstream of a pump equal to the pump flow thereby
forcing it to be an unpeakable load. If this option is not checked then the
gravity main flow downstream of a pump is set equal to the flow entering the wet
well. This option can be used only for steady-state analysis and design.
Flow Attenuation - Check this option to include
flow/hydrograph attenuation in the EPS simulation. If this option is not checked
then flow attenuation will not be considered in the analysis. Flow attenuation
in a sewer collection system is the process of reducing the peak flow rate by
redistributing the same volume of flow over a longer period of time as a result
of friction (resistance), internal storage and diffusion along the sewer
pipes.InfoSewer uses a distributed Muskingum-Cunge flow routing method based on
diffusion analogy, which is capable of accurately predicting hydrograph
attenuation or peak flow damping effects (peak subsidence). This option can only
be used for extended period simulation.
Unit Hydrograph Adjustment Threshold(%) - The option
provides the flexibility whether to adjust ordinates of synthetic unit
hydrograph such as Tri-triangular, NRCS Dimensionless, NRCS Triangular and CUHP.
Theoretically, volume under a UH has to be drainage area * an inch of rainfall.
That may not happen while synthesizing UHs. In case the difference in volume
under the synthesized UH and the theoretical volume exceeds the threshold
assigned by the user, the model will adjust the UH volume to "match" the
theoretical volume.
Advanced Forcemain Network
Support - The checkbox for Advanced Forcemain Network Support allows the
simulation of two or more upstream force mains to one or more downstream force
main(s) through a junction chamber. The link flows and node depths are solved
iteratively to maintain the mass balance and the energy balance of the incoming
and outgoing flows. The new network solver is used to calculate the flows in
the forcemain pipes and the heads at the junction chambers associated with the
force main(s). See Advanced
Force Main Network Solution for additional information.
If the checkbox flag is turned on
(checked) then the new Advanced Forcemain Network
Support will be used during the simulation.
If the checkbox flag is turned off
(unchecked) then the default force main solution will be used. You will get an
error message if there is more than one force main connected to the same
junction chamber.
In the example shown below,
the upstream force mains are links 947 and FM51, the merging junction chamber is
node 52 and the downstream force main is link 53. As you can see in the graph
from the Output Report Manager the flow in link 53 is the sum of the flows in
links 947 and FM51. This example will only work with the new Advanced Forcemain
Network Support feature
The Create Shapefile tool available from the GIS Gateway, allows you to create a new ESRI® Shapefile directly from InfoSWMM data. Any data associated with each data type can be used to populate the new Shapefile attribute table. The tool can be applied to a Domain or to the Active Network as needed.
The dialog box looks like this:
A description of the features:
Feature/Button
Description
Data Type
Choose the modeling data type that the new Shapefile will be based on
Fields to Export
Depending on which Data Type was chosen, a list of available information fields will be shown. Use click, ctrl-click or shift-click to select all fields you wish to include in the new Shapefile’s Attribute Table.
Apply on Domain
If this option is chosen, only features contained in the current Domain (if one is defined) will be exported to the new Shapefile.
Apply on Active Network
If this option is chosen, only features in the Active Network will be exported.
Shapefile
This box contains the filepath and filename of the new Shapefile
Use the Browse button to choose a filepath and filename for the new Shapefile
Create
When all parameters are selected, click this button to export the Shapefile
Close
Close the dialog box without exporting the Shapefile
