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a and b are user-inputted regression coefficients, as defined by McMurray (2004)1
Upstream flow
The total collected flow at an Onstream Farm Dam node consists of two parts:
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SpillVolt – The actual spill water volume from the farm dam at time step t
Vt - The final result of the storage volume at time step tFinal storage volume at time step t
Downstream Flow
Finally, flow directly downstream from the farm dam is calculated by Equation 28:
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Where:
DSFlowt – The actual water volume downstream of the farm dam at time step t
The Source simulation of onstream farm dams is based on a generalised water balance, and the final flow output downstream of the farm dam takes into account all components such as actual Interstation flow, actual diverted flows, actual inflow volume, actual bypassed flows, actual rainfall volume, actual evaporation volume, actual seepage, storage volume and downstream 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.