eWater Source is Australia’s national hydrological modelling platform which integrates water resource assessment with policy. An adaptive customisable platform which enables the technical assessment of water balance is combined with a unique governance modelling capability to produce water accounts and operate rivers according to agreements and treaties. A new generation tool created to support the transformation of Australia’s water modelling capability, Source is the outcome of two decades of collaboration between State and Federal Government water organisations, leading universities, water utilities and regional rural water authorities through the eWater CRC and it’s predecessors the CRC for Catchment Hydrology and the CRC for Freshwater Ecology. Endorsed and defensible – Source has been endorsed by the Council of Australian Governments as the national hydrological modelling platform.

Hydrological analysis for equitable sharing and operational management of scarce water resources

Source is designed for managers, researchers, modellers and consultants to develop computer simulation models of rivers and catchments so as to firstly, understand and explore important aspects of their behaviour and secondly, guide decision making. To use Source, you should have a good working knowledge of catchment hydrology, integrated catchment modelling, river systems and river system modelling and, preferably, the support of experienced users. This reference manual assumes you have a basic knowledge of mathematics, physics and chemistry equivalent to completing high school or introductory tertiary courses. Information produced by Source may be useful for a broader audience of people, including: Management and government representatives who want to understand how and where model results were obtained; Clients, such as resource managers (of catchments or water), water planners and operators, who rely on a model’s results but are not necessarily interested in the detail of the model development process. They are often, however, interested in understanding general configuration and application issues; People affected by decisions supported by model results or who have a general interest in water use in a river system (eg irrigators or environmental groups); and People with an interest in water science, who may use model results and want to understand the model’s behaviour.

Source provides a flexible structure that allows you to select a level of model complexity appropriate to the problem at hand and within any constraints imposed by your available data and knowledge.

eWater Source is the definitive integrated water resource management (IWRM) modelling software for: • integrated water resource assessments, including agricultural, hydropower, urban, industrial and environmental requirements • water balance studies from catchment to river basin scale • water accounting and analysis of supply/demand balances • inflow forecasting and multi- objective reservoir operations • resource assessment and allocation policy development and planning • trade-off analysis to balance sharing and equitable use of scarce water resources • low flow and drought management • water quality analysis based on catchment land use scenarios • impacts of climate change and transboundary transfers • bulk water systems optimisation, planning and operations including multiple supply options (reservoir/recycling/desal) • conjunctive groundwater-surface water use analysis.

Water Governance Rainfall Runoff Models Storages and Reservoirs Water Users and Demands Water Quality Groundwater In stream Routing River and Reservoir Operations Results Management and Charting Calibration Tools