Custom Storage and outflow
- Geoff Davis
- Mukta Sapkota
Introduction
A new custom outflow and storage interface has been included in MUSIC. It allows the outflow and storage characteristics of selected Treatment Nodes to be fully customised.
Using the Custom Outflow/Storage Interface
To access the custom outflow and storage interface, open the node properties dialog and click Custom Storage Outflow Tab, then check the User Custom Storage Discharge Curve, as shown below (if this check box is not displayed, the selected node does not support custom outflow and storage). This dialog shows the relationship between Flow and Height, which is automatically modified to accommodate the same pipeflow entries for the varying heights. This is described in further detail next.
Data range
The measurement of "Height" data starts from "Pipe Flow" outlet level. In other word the "Height" is zero at "Pipe Flow" outlet level, which is the surface level of permanent pool (see conceptual diagram of the storage unit). The "Height" data must cover the range starting from zero at the permanent pool's surface level to 2m above the "overflow weir level". For example, if the "Extended Detention Depth (EDD)" is 0.35m, the "Height" data range should be 0 - 2.35m.
Description of Dialog Buttons/Functionality
The Pipe Flow, Weir Flow and Storage tables allow custom data points to be entered / modified directly.
 Removes all data from the current outflow/storage relationship.
When this button is pressed, MUSIC will extract outflow or storage relationships at the nominated ‘height increment’ based on the current node storage and outlet properties. A minimum height increment of 0.01m can be defined.
Different height increments can be specified for outflow and storage. That is, a constant height increment is not required for all relationships.
Allows importing of the data
Allows data from the tables to be copied and pasted into Excel.
The main chart displays the outflow and storage relationships. The relationships can be turned on or off using the check boxes in the legend at the top of the chart.