Reservoirs

The Basin module accommodates multiple multi-purpose Reservoir systems.

Individual Reservoirs can simulate the performance of specified operating policies using associated operating rule curves. These define the desired storage volumes, water levels and releases at any time as a function of cur­rent water level, the time of the year, demand for water, and losses and gains.

For Reservoirs, which have a significant surface area compared to the catch­ment area, in which they are located, it may be important to extract the reser­voir surface area from the catchment area. This is done by enabling ‘Subtract area of irrigation users and reservoirs from catchment area to calculate run­off’ in the Simulation specifications|modules page.

Note that in order to use this option the Reservoir must be located on the catchment node.

Inserting a reservoir

To insert a Reservoir in the model select the ‘Add’ button under the Reser­voirs ribbon in Map view and click on the desired location of the Reservoir. The Reservoir must be located on a river Branch.

Figure 9.1           Inserting a Reservoir

The Reservoir may be connected to other Reservoirs and/or Remote flow control points by using the ‘Add Connection’ button. The digitisation of a Con­nection must always be done in the direction of the flow.

Note that the mouse cursor changes to a cross when the cursor is properly placed.

Specifying reservoir properties

The Reservoir properties dialogue contains the following tabs:

·         General

·         Operations

·         Users

·         Remote Flow Control

·         Storage Demand

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