Page Comparison

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a and b are user-inputted regression coefficients, as defined by McMurray (2004)

Upstream flow

The total collected flow at an Onstream Farm Dam node consists of two parts:

• the flow from the upstream node(s), and

• the interstation inflow generated between the upstream node and this dam. When farm dam functionality is integrated with catchment rainfall-runoff modelling, the concept of interstation inflow to an Onstream Farm Dam node is replaced by sub-catchment lateral flows. In this case the Interstation Flow Scaling Factor remains at its default of 1 and the Reference time series Value remains a default constant of 0.

When applied, interstation inflow is determined as in Equation 4:

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Where:

ActISFlow_t  - the Actual Interstation Flow volume at the time step t. This is the Interstation Flow Reference series scaled down/up by the Scaling Factor

ISFlowFact  - the Scaling Factor, an input constant parameter

ISFlowRef_t  - The Interstation Flow Reference Time Series at time step t

The total upstream flow at the farm dam is then calculated as in Equation 5:

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Where:

ToTFlow_t - total upstream flow at time step t

USFlow_{t– total flow from upstream node(s) at time step t}

ActISFlow_{t  -} contributing Interstation Flow

References

¹ McMurray, D, 2004. Farm Dam Volume Estimations from Simple Geometric Relationships. Department of Water, Land and Biodiversity Conservation. South Australia. Report No. DWLBC 2004/48.