Most catchments in Australia have undergone studies to quantify their environmental water requirements. Environmental water requirements are rules around how water should be delivered to sustain the environment e.g. to allow fish to migrate and trees to germinate.
In recent years, there has been a large state and federal investment in buy backs of water for the environment. For example, the Commonwealth Environmental Water Holder has 2,876 GL of water entitlement (about 6 Sydney Harbours). Flow studies determined water requirements, while buy backs and water plans have provided an water to allocate to the environment.
While progress towards quantifying water requirements and obtaining water to allocate to the environment has been good, the ability to report the success of meeting water requirements has been lacking.
The particular challenge in reporting the achievement for environmental watering objectives is that natural systems rarely deliver water in the prescriptive pattern defined in the environmental flow requirement, or flow rule. An environmental flow requirement may specify a flow of 100ML/d, however using the traditional reporting techniques a flow of 99ML/d would be reported as a fail. In addition, to this traditional binary nature of pass/fail reporting, there are few tools available to facilitate a repeatable process for reporting environmental watering performance.
eFlow Projector overcomes these challenges by providing a web-based reporting tool that takes a more nuanced approach, quantifying and reporting partial success.