Spatial Tool for Estimating Dam Impacts (STEDI)
STEDI is a water balance model that uses streamflows, dam sizes, dam location, water use demands, rainfall and evaporation to simulate individual dams within a catchment.
STEDI was developed by the Department of Environment, Land, Water and Planning (DELWP) in conjunction with Jacobs (previously Sinclair Knight Merz (SKM)) and is distributed as public domain software and can be downloaded free of charge.
When using STEDI, you can enter as much information about dam size, catchment areas and on-farm demands as is available. You can also spatially configure a network of dams in a catchment so that upstream dams influence inflows.
STEDI can run at a daily, weekly, or monthly timestep and, given the proper inputs, can model:
- Low flow bypasses around farm dams;
- Farm dams that are manually 'topped-up' by pumping, for example, from a local watercourse;
- Changes in water use demands; and
- The effects on flows from one dam to another through the catchment.
Developed in 2005, Jacobs has maintained the software, which is still live and available for download.
STEDI is distributed as public domain software and can be downloaded free of charge.
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STEDI has been developed and tested by Jacobs, formerly Sinclair Knight Merz (SKM), in partnership with the Department of Environment, Land, Water and Planning. In addition, some program maintenance and limited user support is provided by Jacobs.
The public release of STEDI responds to widespread concerns about the possible impact of farm dams on water entitlements and environmental flows and the growing need to accurately represent farm dam impacts in the face of climate change.
Image credit: Craig Moodie
Page last updated: 05/05/22