Development of Induced Surcharge Envelope Curves
This post will describe how these curves are used in the real-time operation of a reservoir.
Based on the forecasted inflow from observed rainfall, the reservoir engineer will develop a peak pool forecast based on an initial release schedule. The point relating the maximum pool elevation achieved along with the maximum release will be plotted on the curve containing the envelope curve. If the maximum pool / maximum release point plots above the the envelope curve, then a new release schedule will need to be developed. This iterative process continues until the maximum pool / maximum release point plots either on or below the envelope curve.
An example of this is shown below. For the first iteration (shown by the red dot), the release is held to zero. Since this plots above the envelope curve, another iteration must…