Page Comparison

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1. Initialise temporary parameters.

2. Set each owner’s upstream inflow I(o) to equal that owner’s share of the upstream component’s outflow using equation (10). (The upstream component is the next division upstream, or if it is the first division in the link, the upstream node).

3. Determine the volume of the total flow based flux, fFlow_LG(), for this time step to be shared according to fixed ratio, expression or time series specified by the modeller.  Where relevant, also determine the volume, Loss_HF, that is to be shared using high flow rules (i.e. Murray-style losses), which is the volume that is in excess of the value of fFlow_LG().
   • If the ownership system uses Murray-style losses:

     1. The flux based on flow up to the high flow threshold is shared according to fixed ratio. This volume is:

Eqation

4. • 1. Equation 57	Image Modified

 

5. • 1. The flux based on flow above the high flow threshold is shared according to high-flow rules. This volume is:

 

6. • 1. Equation 58

 

7. • 1. Image Added

 

8. • Otherwise, all the flux is shared using fixed shares, expression or time series

 

9. • specified by the modeller:

     Equation 59	Image Added

10. Determine every owner’s fixed flux total for this time step (Loss_fixed(o)), where the modeller has specified which of the link’s lateral fluxes (time series, general purpose flow based, groundwater and net evaporation) are fixed at the ownership system level (noting these must satisfy equation (11)).
    1. 1. Time series flux:
11. Determine the owner’s share of input time series:
    1. 1. 1. • If the time series flux for the current link is not input per owner, and for the ownership system time series flux sharing is by fixed ratio, apply the specified owner’s ratio to the total time series flux, 〖Flux〗_TS, that was calculated prior to ownership processing (〖Flux〗_TS has been adjusted to ensure total loss does not exceed the amount of water in the division).

    2. Time series flux:

12. Determine the total proportional flux, Loss_prop.
13. Determine the division’s state (‘dead’ or ‘live’).
14. Find the division’s storage using a method appropriate to the state of the division (i.e. whether ‘dead’ or ‘live’).  These methods are summarised in the two following sections.
15. Calculate each owner’s outflow, , using equations (15) or (16), as appropriate, rearranged so the term  is on the left hand side of the equation. 
16. Adjust owner shares of outflow as necessary to ensure that none are negative.  The principles are discussed in Ownership Adjustments, above.  In summary, if , the owner concerned borrows from other owners to ensure O(o)=0.
17.  Calculate owner mass balances to report, based on equation (15) or (16), as appropriate, using adjusted values of O(o)=0.

Data

Input data

Details on data requirements are provided in the Source User Guide.

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