& Construction
![architecture engineering and construction collection logo](https://damassets.autodesk.net/content/dam/autodesk/www/universal-header/flyout/architecture-engineering-construction-collection-uhblack-banner-lockup-364x40.png)
Integrated BIM tools, including Revit, AutoCAD, and Civil 3D
& Manufacturing
![product design manufacturing collection logo](https://damassets.autodesk.net/content/dam/autodesk/www/universal-header/flyout/product-design-manufacturing-collection-uhblack-banner-lockup-364x40.png)
Professional CAD/CAM tools built on Inventor and AutoCAD
Integrated BIM tools, including Revit, AutoCAD, and Civil 3D
Professional CAD/CAM tools built on Inventor and AutoCAD
Transcript
00:03
When you are working in a region that is not covered by one of the standard rainfall theories provided within the program,
00:09
you can define your own rainfall.
00:12
But to do so, you must be able to enter two pieces of information:
00:16
the IDF curve or curves,
00:19
and the dimensionless shape curve.
00:22
If you have data tables that reflect these, then you can build your own rainfall definition.
00:27
Open the Rainfall Manager, and in the toolbar, click New to create a new rainfall event.
00:34
For this example, name it “Test 1”, and then click Save.
00:39
Under Rainfall Manager Items, expand the IDF node to access the IDF library.
00:46
If you had a single IDF curve, you would choose Single RP IDF.
00:51
But for this example, a series of curves is available in the spreadsheet,
00:56
so click Table IDF to create a table of events.
01:00
To review the data, open the sheet.
01:03
In this example, there are data for the IDF curves for three storm durations,
01:08
and temporal patterns for the dimensionless curve data.
01:12
Start with the IDF data.
01:15
Back in the Rainfall Manager, with Table IDF selected, click Add.
01:21
First ensure that Rainfall Intensity is enabled to specify that you are entering rainfall intensity values.
01:29
Next, since the Duration already has a column,
01:32
you only need to create columns for each of the three return periods.
01:36
In the table tools, click Add (+).
01:40
In the Add Return Period popup, add in one of the return periods.
01:46
In the Return Period (years) field, enter 2, for the 2-year return period, and then click OK.
01:54
Repeat this process to add in the 30-year and then the 100-year return periods.
01:60
Back in the table in the Rainfall Manager,
02:04
you do not need the 1-year return period for this exercise,
02:07
so select the column header and then click Delete (-) to remove it.
02:11
Once the column headers are set,
02:14
return to the spreadsheet and copy out the data.
02:18
Ensure that you copy only the actual data, not the headers.
02:23
Back in the program, click the first cell under Duration,
02:27
and then paste the data.
02:29
With the three different return periods entered,
02:32
best practice is to rename the table.
02:35
Under the Items list, highlight the child Table IDF item,
02:38
and then type “Test 1” to rename it to match the project name.
02:43
Next, you need to enter the temporal pattern data,
02:47
which again is the dimensionless relationship data that defines the curve.
02:52
In the Rainfall Manager Items list, click Temporal Pattern.
02:56
Then in the toolbar, click Add (+).
02:59
Under Temporal Pattern, next to Label, enter a name, such as “Test 2” for this exercise.
03:06
Expand the Profile Type drop-down and select Custom – Dimensionless.
03:12
For the Editable Column drop-down, keep Cumulative selected.
03:17
Back in the spreadsheet, copy the percentage time values, and again, do not include the header.
03:24
Be aware that for these, you cannot start from a percentage time of 0.
03:29
Copy from a non-zero value, such as 5, as shown here, through 100,
03:35
then place them into the table in the Rainfall Manager under Time (%).
03:40
Repeat this process with the Cumulative column.
03:43
From the spreadsheet, copy the data under Percentage depth,
03:47
then return to the program to paste it under Cumulative (%).
03:52
Now that you have the two essential elements—the IDF curve and the shape of the event—you need to bring them together
03:58
to create a series of user-defined rainfall events.
04:02
Expand the Design Storms node,
04:05
then select User Defined Rainfall.
04:08
Click Add (+).
04:11
Next to Label, rename it “User Defined Rainfall 1”.
04:16
Click OK to close the Rainfall Manager.
04:19
Note that for the library to update with the new information you just entered,
04:23
the Rainfall Manager first needs to close.
04:27
Now, when you re-open it, the User Defined Rainfall 1 Design Storm is still active,
04:32
and on the Storms tab, notice that the Create From IDF tool is available.
04:37
Click Create From IDF, and in the User Defined Rainfall From IDF popup,
04:42
select From Library, and then expand the drop-down.
04:47
The Test 1 IDF curve you created now appears in the library.
04:51
Select Test 1.
04:53
The return period information appears.
04:56
Expand the Return Period drop-down and select 30-years.
05:01
Click OK.
05:04
To identify it more clearly, change the Label to “30 years”, and then press ENTER.
05:10
Next, in the table, under Temporal Pattern, expand each drop-down and select the Test 2 pattern you created.
05:19
Ensure that you apply it to each one.
05:22
Also, enable Use for all the rows,
05:24
as it is not active by default.
05:27
This means you will now use these nine rainfall events
05:30
with the Temporal Pattern set to Test 2.
05:34
Click the Temporal Pattern tab, where you can double-check that it displays the data you entered.
05:39
Click the Increase Rainfall tab.
05:42
If you wanted to add in an aspect of climate change, you could do that here.
05:47
Click Save to save your rainfall definition,
05:50
then click OK to close the Rainfall Manager.
05:54
Be aware that you can reuse this same rainfall later, if needed.
05:59
Now, you can run an analysis using your data.
06:03
On the ribbon, Analysis tab, Criteria panel, click Analysis Criteria.
06:10
In the Analysis Criteria dialog,
06:13
your User Defined Rainfall 30 years set of curves is now available.
06:18
And crucially, you can see that there are nine rainfall events matching the nine that you chose to use.
06:24
Click OK.
06:26
It is always good practice to run a validation,
06:30
so in the ribbon, click Validate.
06:33
In the Validate dialog, if it shows as OK, click OK to close it.
06:38
In the ribbon, click Go.
06:42
A Progress dialog appears.
06:44
This network model is small, with only 40 manholes and 40 pipes, and only 9 storms.
06:51
This does not take long to process, but a larger model may take longer.
06:57
Once the simulation is finished, the Stormwater Controls Summary appears,
07:01
but you can look at the results in several different ways.
07:05
Click Close.
07:07
For example, on the ribbon, click the Results tab,
07:11
and in the Item Results, expand the Inflows drop-down and select S29-DA.
07:18
In the graph, you can look at the flows entering or leaving an inflow area, or entering a manhole.
07:24
You can also choose which rainfall events you want to review.
07:29
In the Event Selection panel, expand the Select Event drop-down
07:33
and choose a different rainfall event, such as 240.
07:37
Back in the graph, if you switch off the inflow, you can see only the rainfall.
07:42
In this case, because it is a 1-in-30-years storm, 240-minute event,
07:47
the maximum intensity is a little more than 26 millimeters per hour.
07:53
As you can see, creating your own rainfall data for determining temporal patterns is easy
07:58
if you have the IDF curve and shape curve data for your area of interest.
Video transcript
00:03
When you are working in a region that is not covered by one of the standard rainfall theories provided within the program,
00:09
you can define your own rainfall.
00:12
But to do so, you must be able to enter two pieces of information:
00:16
the IDF curve or curves,
00:19
and the dimensionless shape curve.
00:22
If you have data tables that reflect these, then you can build your own rainfall definition.
00:27
Open the Rainfall Manager, and in the toolbar, click New to create a new rainfall event.
00:34
For this example, name it “Test 1”, and then click Save.
00:39
Under Rainfall Manager Items, expand the IDF node to access the IDF library.
00:46
If you had a single IDF curve, you would choose Single RP IDF.
00:51
But for this example, a series of curves is available in the spreadsheet,
00:56
so click Table IDF to create a table of events.
01:00
To review the data, open the sheet.
01:03
In this example, there are data for the IDF curves for three storm durations,
01:08
and temporal patterns for the dimensionless curve data.
01:12
Start with the IDF data.
01:15
Back in the Rainfall Manager, with Table IDF selected, click Add.
01:21
First ensure that Rainfall Intensity is enabled to specify that you are entering rainfall intensity values.
01:29
Next, since the Duration already has a column,
01:32
you only need to create columns for each of the three return periods.
01:36
In the table tools, click Add (+).
01:40
In the Add Return Period popup, add in one of the return periods.
01:46
In the Return Period (years) field, enter 2, for the 2-year return period, and then click OK.
01:54
Repeat this process to add in the 30-year and then the 100-year return periods.
01:60
Back in the table in the Rainfall Manager,
02:04
you do not need the 1-year return period for this exercise,
02:07
so select the column header and then click Delete (-) to remove it.
02:11
Once the column headers are set,
02:14
return to the spreadsheet and copy out the data.
02:18
Ensure that you copy only the actual data, not the headers.
02:23
Back in the program, click the first cell under Duration,
02:27
and then paste the data.
02:29
With the three different return periods entered,
02:32
best practice is to rename the table.
02:35
Under the Items list, highlight the child Table IDF item,
02:38
and then type “Test 1” to rename it to match the project name.
02:43
Next, you need to enter the temporal pattern data,
02:47
which again is the dimensionless relationship data that defines the curve.
02:52
In the Rainfall Manager Items list, click Temporal Pattern.
02:56
Then in the toolbar, click Add (+).
02:59
Under Temporal Pattern, next to Label, enter a name, such as “Test 2” for this exercise.
03:06
Expand the Profile Type drop-down and select Custom – Dimensionless.
03:12
For the Editable Column drop-down, keep Cumulative selected.
03:17
Back in the spreadsheet, copy the percentage time values, and again, do not include the header.
03:24
Be aware that for these, you cannot start from a percentage time of 0.
03:29
Copy from a non-zero value, such as 5, as shown here, through 100,
03:35
then place them into the table in the Rainfall Manager under Time (%).
03:40
Repeat this process with the Cumulative column.
03:43
From the spreadsheet, copy the data under Percentage depth,
03:47
then return to the program to paste it under Cumulative (%).
03:52
Now that you have the two essential elements—the IDF curve and the shape of the event—you need to bring them together
03:58
to create a series of user-defined rainfall events.
04:02
Expand the Design Storms node,
04:05
then select User Defined Rainfall.
04:08
Click Add (+).
04:11
Next to Label, rename it “User Defined Rainfall 1”.
04:16
Click OK to close the Rainfall Manager.
04:19
Note that for the library to update with the new information you just entered,
04:23
the Rainfall Manager first needs to close.
04:27
Now, when you re-open it, the User Defined Rainfall 1 Design Storm is still active,
04:32
and on the Storms tab, notice that the Create From IDF tool is available.
04:37
Click Create From IDF, and in the User Defined Rainfall From IDF popup,
04:42
select From Library, and then expand the drop-down.
04:47
The Test 1 IDF curve you created now appears in the library.
04:51
Select Test 1.
04:53
The return period information appears.
04:56
Expand the Return Period drop-down and select 30-years.
05:01
Click OK.
05:04
To identify it more clearly, change the Label to “30 years”, and then press ENTER.
05:10
Next, in the table, under Temporal Pattern, expand each drop-down and select the Test 2 pattern you created.
05:19
Ensure that you apply it to each one.
05:22
Also, enable Use for all the rows,
05:24
as it is not active by default.
05:27
This means you will now use these nine rainfall events
05:30
with the Temporal Pattern set to Test 2.
05:34
Click the Temporal Pattern tab, where you can double-check that it displays the data you entered.
05:39
Click the Increase Rainfall tab.
05:42
If you wanted to add in an aspect of climate change, you could do that here.
05:47
Click Save to save your rainfall definition,
05:50
then click OK to close the Rainfall Manager.
05:54
Be aware that you can reuse this same rainfall later, if needed.
05:59
Now, you can run an analysis using your data.
06:03
On the ribbon, Analysis tab, Criteria panel, click Analysis Criteria.
06:10
In the Analysis Criteria dialog,
06:13
your User Defined Rainfall 30 years set of curves is now available.
06:18
And crucially, you can see that there are nine rainfall events matching the nine that you chose to use.
06:24
Click OK.
06:26
It is always good practice to run a validation,
06:30
so in the ribbon, click Validate.
06:33
In the Validate dialog, if it shows as OK, click OK to close it.
06:38
In the ribbon, click Go.
06:42
A Progress dialog appears.
06:44
This network model is small, with only 40 manholes and 40 pipes, and only 9 storms.
06:51
This does not take long to process, but a larger model may take longer.
06:57
Once the simulation is finished, the Stormwater Controls Summary appears,
07:01
but you can look at the results in several different ways.
07:05
Click Close.
07:07
For example, on the ribbon, click the Results tab,
07:11
and in the Item Results, expand the Inflows drop-down and select S29-DA.
07:18
In the graph, you can look at the flows entering or leaving an inflow area, or entering a manhole.
07:24
You can also choose which rainfall events you want to review.
07:29
In the Event Selection panel, expand the Select Event drop-down
07:33
and choose a different rainfall event, such as 240.
07:37
Back in the graph, if you switch off the inflow, you can see only the rainfall.
07:42
In this case, because it is a 1-in-30-years storm, 240-minute event,
07:47
the maximum intensity is a little more than 26 millimeters per hour.
07:53
As you can see, creating your own rainfall data for determining temporal patterns is easy
07:58
if you have the IDF curve and shape curve data for your area of interest.
When working in a region that is not covered by one of the standard rainfall theories provided within the program, a rainfall definition can be built. This is done by entering two pieces of information: the IDF curve or curves, and the dimensionless shape curve.
First, create a new rainfall event:
This example uses data for the IDF curves for three storm durations, and temporal patterns for the dimensionless curve data. Start with the IDF data.
Next, create columns for each of the three return periods:
To delete the 1-year return period, which is not needed for this example:
Next, enter the temporal pattern data, which again, is the dimensionless relationship data that defines the curve:
Now, bring the IDF curve and the shape of the event together to create a series of user-defined rainfall events.
Closing and reopening the Rainfall Manager enables the library to update. The User Defined Rainfall 1 Design Storm remains active, and on the Storms tab, the Create From IDF tool is now available.
The return period information appears.
This means that these nine rainfall events will be used with the Temporal Pattern set to Test 2.
Adding in an aspect of climate change could be done here.
NOTE: this same rainfall later can be reused later, if needed.
Now, run an analysis using the data:
In the Analysis Criteria dialog box, the User Defined Rainfall 30 years set of curves is now available, and crucially, there are nine rainfall events matching the nine chosen.
NOTE: Since the model used in this example is small—40 manholes and 40 pipes—and only 9 storms are used, this does not take long to process, but a larger model may take longer.
Once the simulation is finished, the Stormwater Controls Summary appears.
However, the results can be viewed in several different ways:
In the graph, flows entering or leaving an inflow area, or flows entering a manhole can be reviewed. Specific rainfall events can also be selected.
In this case, because it is a 1-in-30-years storm, 240-minute event, the maximum intensity is a little more than 26 millimeters per hour.
Creating rainfall data for determining temporal patterns is a straightforward process, provided the IDF curve and shape curve data for the area of interest is available.
Sign in to start learning
Sign in for unlimited free access to all learning content.Save your progress
Take assessments
Receive personalized recommendations