Allocation pool reservoirs

In Allocation pool reservoirs the main storage is divided into four zones as illustrated in Figure 9.4:

Figure 9.4           Operating zones in an allocation pool reservoir

The Flood control zone and the Inactive zone are identical to those of a Rule curve reservoir.

The Common allocation zone only exists if a guide curve level has been set below a flood control level thus allowing storage of water between these two levels. The guide curve corresponds to the top of the pool allocation zone.

The Pool allocation zone is divided into a pool for releases to the down­stream river (sometimes called a ‘water quality pool’) and a number of water supply pools defined by the user. All these pools are purely conceptual accounting storages used internally in the program, and should not be regarded as physical storages.