Source Version 4.3 delivers new and improved functionality to help you solve some of the long-standing challenges in integrated water resource modelling. For example we've worked closely with MDBA and other stakeholders to deliver new environmental flow management functionality that allows for prioritisation across sites and works directly with entitlement systems. Urban models can now include looped flow systems via bidirectional flow using the new pipe junction node.
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Shortfall priorities allow users in Source to specify how shortfalls are allocated to different water requirements in rules-based ordering systems. It is configured at the scenario level and influences how water is supplied to supply points, minimum flow nodes and storages, and released by storages and splitters. Without a priority system enabled, Source will shortfall all demands proportionally within the model.
Scenario Options, Ordering Priorities
The minimum operating constraint at a storage only applies to water requirements of lower priority than the storage.
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If the storage has more than one outlet path, the storage can be configured to attempt to meet higher priority outlet path requirements first in the event of a shortfall.
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The Operating Constraints (formerly Operating levels) affect storage releases by trying to keep the storage level or volume within the specified range. The storage will not release water to satisfy lower priority priority downstream requirements if this results in the water level dropping below the Minimum Operating value. Likewise, water will be released up to the Safe Release Capacity (set at an outlet path) to prevent the storage rising above the Maximum Operating value, for example, if you wanted to leave airspace for flood mitigation. This functionality was previously only available for weirs, but is now available for storage nodes when Backwards Euler release method is enabled.
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Weirs are now their own node. There is a new (optional) algorithm that may be used to model a weir as a triangular pyramid. The original algorithm only allwed allowed modelling the weir as a rectangular wedge. The new algorithm was developed from observations of hydrodynamic models, and more realistically models the wetted (surface) area as the weir fills up. This is useful for understanding the environmental impact of weirs.
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Rain-fed crops can now be modelled in place of a standard rainfall-runoff model as a functional unit within the catchment simulation. The agricultural runoff model represents the crop water use and agricultural runoff as part of the rainfall-runoff process. The daily crop water balance is based on the irrigator demand model and the method described in FAO56 (Allen et al, 1998). It models a daily crop water use, and generates runoff from rainfall excess from the functional units. The rainfall excess can be routed as quick flow and slow flow to the rivef river system. Crop use of water from small storages in catchments can be represented by on-farm storages (also known as check dams in some countries) within the agricultural runoff model. A number of the model parameters can be calibrated alongside other rainfall runoff models using the Source calibration wizard.
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eWater's software development team understands the importance of maintaining good practice for version control of our software code. We believe that these principles are of value to our Source users to help them manage their Source projects. We have implemented functionality to facilitate a Source project version control system. This will help you identify project changes over time such as model configuration, inputs and results.
Project Options, Project Summary Export
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