Aggregate Conjunctive Use
The Aggregate Conjunctive Use category exists as a user-selectable method category only when Lumped Structure is selected as the linking structure.
This category is used to model supplemental diversions from groundwater. Conjunctive Use calculations also exist for Sequential Structure and No Structure; however, the method is selected on the Water User elements for these cases.
NoneThis is the default method.
This method performs no computations, and there are no slots associated with it.
Supplement Diversion LumpedThis method is used to supplement surface water diversions with groundwater.
Slots Specific to This Method
Available Supplemental Water
Type: Series Slot
Units: FLOW
Description: represents the amount of water available to supplement surface water diversion
Information:
I/O: Optional; Input if not linked to the Available For Pumping slot in the Groundwater Storage object.
Links: May be linked to Available For Pumping on a Groundwater Storage object.
Supplemental Diversion
Type: Series Slot
Units: FLOW
Description: the amount of water diverted from groundwater for supplemental use
Information:
I/O: Output only
Links: May be linked to the Pumped Flow slot on the Groundwater Storage object.
Total Supplement Return Flow
Type: Series Slot
Units: FLOW
Description: return flow from the supplemental water
Information:
I/O: Output only
Links: May be linked to the Return Flow slot on any object or the Inflow slot on a Groundwater Storage object.
Total Supplemental Use Request
Type: Series Slot
Units: FLOW
Description: the amount of water requested from groundwater for supplemental use
Information: If not input, it is calculated as the difference between Diversion Requested and Diversion.
I/O: Optional
Links: Usually not linked
If Available Supplemental Water is known, the following conjunctive use calculations are performed.
Method Details
If Total Supplemental Use Request is not input, it is calculated as follows.
(The Maximum Total Supplement Request slot is instantiated when an Aggregate Max Supplemental Request method is selected.)
Supplemental Diversion is then calculated as follows.
Total Supplement Return Flow is as follows.
Supplement Diversion SequentialThis method on the Agg Diversion Site object is not visible or user-selectable. It is activated when Supplement Diversion is selected in the Conjunctive Use method category on one or more Water User elements.
Slots Specific to This Method
Available Supplemental Water
Type: Series Slot
Units: FLOW
Description: represents the amount of water available to supplement surface water diversion
Information:
I/O: Optional; Input if not linked to the Available For Pumping slot in the Groundwater Storage object.
Links: May be linked to Available For Pumping on a Groundwater Storage object.
Supplemental Diversion
Type: Series Slot
Units: FLOW
Description: the amount of water diverted from groundwater for supplemental use
Information: Should be linked to the Pumped Flow slot on the Groundwater Storage object.
I/O: Output only
Links: May be linked to the Pumped Flow slot on the Groundwater Storage object.
Total Consumption
Type: MultiSlot
Units: FLOW
Description: sum of the Consumption slots of all Water User elements performing conjunctive use calculations
Information: This slot does not consider consumption by Water User elements that do not have Supplement Diversion selected in the Conjunctive Use category.
I/O: Output only
Links: Usually not linked
Total Consumption Shortage
Type: MultiSlot
Units: FLOW
Description: sum of the Consumption Shortage slots of all Water User elements performing conjunctive use calculations
Information: This slot does not consider consumption shortages of Water User elements that do not have Supplement Diversion selected in the Conjunctive Use category.
I/O: Output only
Links: Usually not linked
Total Supplemental Use Request
Type: Series Slot
Units: FLOW
Description: sum of the Supplemental Use Request slots on all Water User elements performing conjunctive use calculations
Information:
I/O: Output only
Links: Usually not linked
Method Details
Supplemental Diversion is set as the lower value of either Total Supplemental Use Request or Available Supplemental Water. This represents the amount of water that is available to supplement all the Water User elements’ requests.
There may not be enough water to meet the Supplemental Use Requests of all the elements, however. In this case, the Agg Diversion Site allocates the supplemental water to the elements based on their Supplemental Diversion Priority—a slot on each element which has Supplement Diversion selected. The element with the highest priority (lowest integer value) is allotted the total amount requested, if possible.
If there is supplemental water remaining, it is allotted to the element of second highest priority. This is continued until no supplemental water remains.
Revised: 07/09/2023