Drain Properties can be input under the Spread Input. Users have to select “Drain” before inputting the drain properties.

MISC #

Properties #

Design Info #

Setting the MSMA Edition to be applied to the analysis.

Users will have the options between MSMA 1st Edition and MSMA 2nd Edition.

Location #

To set the rain gauge location by clicking on the ‘…’ button.

To set the IDF Coefficient, users may refer to the article, Modifying CCF or IDF Coefficient in MiTS 3.

Click on the ‘…’ button to go to the IDF Coefficient dialog.

Running Network #

Users can now group drains by different network names and even customize the drain prefixes.

Before importing or creating any drains, users must set the Running Network to ensure they are grouped correctly.

New Drain Properties #

Users are now able to predefine the drain properties settings before importing or creating any drains.

Selected Drains #

Users can input the drain properties in the Misc tab by selecting the particular drain.

Spread Input #

It is easier for users to input the drain properties by going to the “Spread Input”.

Invert Level Adjustment #

Users can reapply different default invert depth per pipe basis (apply for existing drain and newly created drain).

Go to

StormSync > Spread Input > Select drain/drains > Click ‘Adjustment’ button on top left at the spread input.

Users can choose to reset the inverse depth by:

• Adjust from the current IL

• Adjust from GL

Note:

• Users can select multiple pipes to raise/lower the pipes.

• Positive (+ve) value is to raise the IL

• Negative (-ve) value is to lower the IL

Drain Type and Dimension #

Drain type #

Select the drain type by clicking the drop-down list in the Drain Type column.

Drain Category #

To add a new category, go to

Options > Project Settings > Drainage > Drain Categories > Add Category Type

Then, to add the category as a selection for each of the drain types,

Drain Types > Choose the drain type you are using > Click on Add/Remove > Click the category you want to add in the Master List > Click on the right arrow to add in the Part List > Click OK

The new category will be listed under the Drain Type column of the Spread Input.

As for adding new dimensions to the newly added category, users will need to ensure the category has been selected under the parameter settings.

Drain Dimension #

Open the parameter dialog box by changing the Iterate setting from Yes to No under the Dimension column.

Changes to the drain dimension can be made by clicking the ‘…’ button under the mm column. Under the Dimension Editor, users can select the existing diameter from the drop-down or input a new diameter.

Optimum Drain Size Design #

Users can allow the program to determine the optimum drain size for the drainage network system of the project. Iteration of the drain size will be done, and the optimum drain size will be selected by the program.

Users can allow the iteration for drain and gradient by selecting “Yes” at the particular drain in Drain Properties.

Composite Drain #

To create a composite drain, users are able to assign different roughness coefficients based on the sides of the drain.

Go to

Options > Project Settings > Drainage > Drain Types (Choose the drain you use) > Go to Manning column and click on the ‘…’

Gradient #

Under the Gradient column, when the Iterate is set to YES, the software will compute a suitable gradient for the drains based on the Ground Level and the drain sizes.

If users wish to input a fixed gradient for the drain, the Iterate should be set to NO.

Do note that for a user-defined gradient, it should be within the gradient range for each drain type under the Project Settings.

Options > Project Settings > Drainage > Drain Type > Select the drain applied to the project > Minimum and Maximum Gradient

Time Concentration and Rainfall Intensity #

Both the Time Concentration (Tc) and Rainfall Intensity will be computed for each drain.

The Tc is calculated by taking into account the Overland Flow Time (To) and the Drain Time (Td) that will be affected by the catchment design.

Users can also define their own Overland Time and Rainfall Intensity by changing the User Defined setting to Yes.

Offset #

This is to represent the position of the drains. Available options for users are Center, Right, and Left.

Reverse Labeling #

This feature will flip the description of the drains or pipes; It will not affect the flow direction or the analysis.

Previous Flow Ratio #

For each of the drains, the flow ratio should be equivalent to 1.00.

Therefore, users must take note of the ratio for drains with splitting flows.

Constraint #

Follow Parameters #

The analysis will check the output, such as depth or velocity, against the parameters under the Project Settings.

This should be the default constraint for the analysis.

Customized #

Users can customize the parameters for each of the drains. This feature is helpful for failed drains or pipes due to depth or velocity with the topography constraint.

To set custom parameters, go to

Constraint column > Select Customized from the drop-down > Click on the ‘…’ button

Cascading Drain Option #

• Auto: Cascading drain will be proposed at the drain when the gradient exceeds the maximum gradient set in the parameter setting

• Always Apply: Cascading drain will be applied to all drains, regardless of the maximum gradient

• Don’t Apply: No cascading drain will be applied