Currently ICM isn't equipped with the tools to calculate the slope from an underlying ground model or 2D zone so this will need to be determined outside of the program. Can you include the ability for the program to calculate an average catchment slope based on the 2D mesh data or ground model within each sub catchment as an option if this has not been done outside of ICM?

The current function allows rainfall runoff to be given to a node, link, multiple links and 2D point source, but not to 2D line source. We are modelling rivers with 2D meshes, but thinking to represent rainfall runoff with subcatchments, as it is more flexible. However, applying rainfall runoff to a 2D point source can mean that lots of water goes into a single mesh, which is not inappropriate in most cases. So, could you please enhance ICM so that we can drain to 2D line source?

Many cities are limiting maximum stormwater dicharge to drainage networks.
ICM should include more efficient modelling regarding
- Limiting stormwater flows from subcatchments via throttle requirement (e.g. 0-10 l/s*ha subcatchment), suggesting a new subcatchment data field.
- And quickly analyse how much stormwater (e.g. 10 m³ ) needs to be managed/retained on each subscatchment site via SUDS such as greenroofs, swales, etc. in order to meet and optimise throttle requirements.

ICM currently allows 4 infiltration types in 2D infiltration types:

-fixed
-Horton
-Constinf
-GreenAmpt

Australian Rainfall and Runoff 2019 talks default initial loss and continuing loss parameters for rural catchments, values for which which can be found in the BOM data hub.

A new 2D infiltration type which allows the simple IL/CL would allow 2D modelling more inline with ARR2019.

So that I can model situation part of the drainage area is not draining to the storm sewer system.

InfoWorks ICM currently has the RAFTS Hydrological Routing method, but as a flood modelling user, I would like access to the RORB method as an option inside ICM. It is a similar method to RAFTS and would help endorsement of the software where RORB hydrology is a requirement.

Australian flood modelling user have requested access to the WBNM hydrology method inside InfoWorks ICM. WBNM is one of the endorsed methods in Australian Rainfall & Runoff and large numbers of historical studies use this method.

It would be great to add PMP (probable maximum precipitation) calculator to XPSWMM and XPSTORM

At the moment it is not possible to set a pollutograph for subcatchments, and the modeller is obliged first to run the hydrology, export the hydrograph, re-import the hydrograph as inflow, and finally re-run with a pollutograph

As a user, I want to generate a synthetic hyetorapg (Chicago Storm) rainfall based on IDF relationship so these storms can be used in ICM.