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A continuous sharing resource assessment system is one in which the behaviour of a water user has as little effect as possible on other water users within that system. For detailed information about continuous sharing, refer to the Source Scientific Reference Guide.
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| Attribute | Details |
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| Timesteps per Reconciliation | The sharing of various system losses is based on long term averages. Over time, discrepancies will emerge which must be reconciled. You can control the frequency with which reconciliations occur using this field. The default is one time-step. Shortfalls identified during a reconciliation are treated as storage losses, gains as inflows. Losses and gains are shared based on account share sizes, but ignore account priorities. The reconciliation process also resolves situations such as when multiple resource assessment systems draw upon the same water (whether such a configuration is accidental or deliberate). |
| Total Conceptual Storage | As each storage is added to the Selected Storages list, the owner’s share in that storage is added to this field, which is the sum of the active capacity for this owner of all of the assigned storages in the resource allocation system. You cannot edit this value directly. |
| High Priority Allocation | By default, 100% of all allocations are considered to be high priority but you can designate a less proportion by adjusting this field. The related fields of High Priority Storage, Medium Priority Allocation and Medium Priority Storage adjust dynamically in response. |
| Medium Priority Threshold | You can adjust this field to determine how inflows are assigned to accounts. It behaves as follows:
The default value is zero, which means that inflows will be assigned to both high priority and medium priority accounts. |
| System Cap Balance Carryover | This specifies the maximum proportion of the owner’s annual resource cap that the system can carry over into the next water year. |
The second step is to specify the percentage shares that the owner has in each storage known to the system. You use the Owner Shares tab in the relevant storage node feature editors to accomplish this.
Next, select each storage that should participate in the continuous sharing system in the Unassigned Storages list and move it into the Assigned Storages list by clicking the button with the right arrow. Note that a storage can be removed from the Assigned Storages list by selecting the storage and clicking the button with the left arrow.
Finally, you can define the loss characteristics of each storage in millimetres per day between one or more start- and end-date pairs within the water year. You can also import loss characteristics from a .CSV file formatted as shown in Table 2.
Table 2. Continuous Sharing (Storage loss rate, data file format)
Row | Column (comma-separated) | ||
|---|---|---|---|
1 | 2 | 3 | |
1 | Start Date | End Date | Loss Rate (mm/d) |
2..n | start | end | flux |
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To add accounts to a continuous sharing resource assessment system, switch to the Accounts tab (Figure 2) and click Add Accounts to open the Add Accounts dialog (Figure 3). The nodes which appear in the list on the left hand side of Figure 3 are Water User nodes, otherwise known collectively as demand nodes. Select one of the nodes in this list and click OK.
Figure 2. Continuous sharing, Accounts
Figure 3. Continuous sharing (Add accounts)
To add accounts for more than one demand node to a resource assessment system, repeat the process of clicking Add Accounts, selecting the relevant demand node, and clicking OKRepeat this process to add additional accounts to the to the list.
By default, an account of each type (ie. a high priority and medium priority allocation account) is added for each water user, although only one account is required to have a maximum account balance greater than zero. Note that , where the High Priority Allocation is 100% (Figure 2), the medium priority account will remain unused.
You can delete an account-pair by selecting either of its members and clicking Delete Accounts.
Figure 2. Continuous sharing, Accounts
Figure 3. Continuous sharing (Add accounts)
Account configuration
You can configure individual accounts by manipulating the controls shown in Figure 3. Fields in grey cannot be adjusted. They fall into three categories:
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