Operating Rule Concept
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For the best possible water resource management of storage systems, instructions are required that clearly define how water should be stored, released or distributed under given system loads and conditions. The sum of these instructions is summarized in an operating plan. An operating plan can consist of many individual regulations, e.g. the compliance with a discharge depending on the storage content. An individual regulation can be called an operating rule.
Since the formulation of an operating rule is always associated with a corrective intervention in the natural flow behaviour, the possibility of changing the flow rate must be available for its execution. Only few water resource management elements are suitable for this purpose. Normally these will be reservoirs with adjustable outlets. Otherwise, variable partitioning structures or variable weirs are available. In Talsim-NG the system elements reservoir and diversion offer the possibility to be controlled by operating rules.
The purpose of all operating rules is to adapt water management system conditions to meet specified objectives. It is irrelevant where the system states and target variables occur, as long as the target variables can be influenced by a change in the system states.
In the following
- typical operating rules for the operation of dams are presented
- the regularities are abstracted
- the calculation scheme for implementation in the simulation is derived
- an example shows the implementation of an operating plan in Talsim-NG