Interim MUSIC Bioretention Treatment Node
IMPORTANT NOTICE: MUSIC Version 5 was recently released by eWater, and so the advice provided below is currently being reviewed.
The current set of design objectives for urban stormwater quality management in South East Queensland aim to reduce the mean annual loads of TSS by 80%, TP by 60% and TN by 45% (relative to unmitigated development). These design objectives have been derived based on a principle of economic best practice, defined by identifying the point of diminishing return above which increases in treatment measure size result in marginal improvements in water quality performance. MUSIC Version 3 was used to determine treatment performance for the purposes of deriving these design objectives.
MUSIC Version 4 was recently released and includes several major improvements, including significant changes to bioretention treatment algorithms which result in different predictions of treatment performance to the earlier versions of the software. The significance of the change in predicted treatment performance is influenced by bioretention treatment node configuration and rainfall patterns.
The implications of this change are currently being investigated in order to determine the appropriate response.
As an interim position until further guidance is provided, the Water by Design Steering Committee has recommended that when modeling bioretention systems, an interim bioretention node is used (available for download below). This interim bioretention node delivers comparable predictions of treatment performance to MUSIC Version 3 but will simulate higher TP removal where a submerged zone is used compared to a MUSIC Version 4 bioretention node where a submerged zone is used.
All other aspects of the model should be used in accordance with the MUSIC Modelling Guidelines (Water by Design).
Note that due to the range of improvements with the software, it is recommended that MUSIC Version 4 be used in preference to MUSIC Version 3.
Instructions for use:
- To use the node, dowload the file and save it to your desktop or other convenient location.
- Open up MUSIC Version 4.0, then load the file
- When prompted, select the box next to Retain Version 3 Treatment Node and click Finish (IMPORTANT STEP!)
- You will now see a node named “Interim Bioretention Node – V3″. Do not close this window or minimise it.
- To use this node in your own models, create a new project (File -> New), or open an existing one (File -> Open).
- Go to the window with the Bioretention Node – V3, select it by clicking on it, then copy it (Ctrl C, or Edit -> Copy).
- Go to a new MUSIC template you have created for your project, and paste the node in (Ctrl V, or Edit -> Paste).
- Change the sizes as appropriate for surface area, filter area, filter depth etc., but be sure to remain consistent with the advice provided in the MUSIC Modelling Guidelines (Water by Design).
Download:
You must be logged in to download guidelines.
Interim MUSIC Bioretention Node.
Trouble downloading? Try right click on the above link (ctrl click on Mac) and select ‘Save Target As’ then select the preferred download destination.
