Bioretention

The Bioretention Node now offers even more accurate modelling of flow as well as water quality treatment. New treatment algorithms in the bioretention filter media are based on the latest research from the Facility for Advancing Water Biofiltration (FAWB).  The new node includes sophisticated predictions of water flow and treatment, taking into account factors such as evapotranspiration and its effect on soil moisture, as well as the design of the system (e.g. filter media type and composition, choice of vegetation, etc).

Media filtration

A new Media Filtration Node allows easy modelling of systems such as sand filters and granular filter media systems. The treatment algorithms can be user-edited, to allow entry of device-specific data.
 

Infiltration

The Infiltration Node now allows infiltration through the sides of the system as well as through the base, providing even more realistic predictions of infiltration in the system.

Improved user interface

An improved Graphical User Interface facilitates visualisation of the various source and treatment node types and allows toolbar access to frequently used menu items.

Six minute timestep

All graphing and statistics can now be undertaken at a user-specified timestep.  For example, the model can be run at 6 minute timesteps, but then the daily results analysed or plotted.

Stormwater harvesting

A new Node Water Balance feature tells the user exactly how much water flowed into and out of a node, through all its various outlet components (including exfiltration and evapotranspiration).  It also tells the user how much stormwater was demanded, and the amount of that demand which was satisfied.  This facilitates analysis of the performance of stormwater harvesting strategies.

Continuously stirred tank reactors

A new user-friendly graphical “CSTR assistant” helps the user to determine the appropriate number of CSTRS (continuously stirred tank reactors) which should be used to represent the system being modelled, based on the shape of the system.

Stormwater reuse

Stormwater reuse demand can now be turned off automatically whenever there is rainfall and a user-specified reuse time series can be imported, making music much more flexible and powerful for analysing stormwater harvesting strategies.

Storage-discharge

A user-specified storage-discharge relationship can now be applied to most treatment nodes.

Life cycle cost

The life cycle cost algorithms have been modified to allow maintenance in the last year, as well as to allow elevated maintenance costs over the first few years of a treatment device. A "notes" facility has also been incorporated to the life cycle cost specification window to allow the user to record assumptions made when developing the life cycle cost estimates for a particular treatment node.

Gross Pollutant Trap

The required volume of a GPT unit (for life cycle cost estimation purposes) is now calculated automatically by music v4 based on the volume of trapped pollutants.  

Modelling pollutants

Default serial correlation coefficients are automatically assigned to source nodes based on the adopted model timestep. This provides for much more realistic generation of pollutants between subsequent model timesteps.

  • See the new features and improvements in this short YouTube video.

Sponsored Product Listing site

www.listing.ewater.com.au

 

 

Further reading

Wong THF, Fletcher TD, Duncan HP, Coleman JR, Jenkins GA (2002) A Model for Urban Stormwater Improvement Conceptualisation. Proceedings of the International Environmental Modelling and Software Society, Lugano, Switzerland, pp. 48-53.

FAWB (2009). Adoption Guidelines for Stormwater Biofiltration Systems, Facility for Advancing Water Biofiltration, Monash University, June 2009.