| INFLOW President's Lake receives the flow of the Idagon after the flow has been increased by the Canadian River. The inflow averages around 33 MAF/year. The month by month variations in the inflow are illustrated in the chart below. The chart shows a peak inflow in the spring. The spring peak is caused by the high releases from Canyon Lake in April/May and by the high spring flows in the Canadian River. OUTFLOW President's Lake is operated for power production and to meet two separate flow targets. The first flow target is set from the flight simulator for the months of April and May. This target is set at 100 MAF/year in the illustration below. The second flow target applies to the other ten months of the year. This second minimum flow target is set at 10 MAF/year in the illustration below. |
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| President's Lake will be operated to meet the two minimum
flow targets specified from the cockpit. To check that this operation is
feasible, you should open the graph "Fullness_of_Western_Reservoirs" to learn if the President's Lake can be refilled each year. You might also open the graph "In_and_Out_Flow_4_President's_Lake" to see if the simulated flows are similar to the illustration shown above. PRESIDENT'S LAKE DIMENSIONS The reservoir storage capacity is 16 MAF which is similar to the capacity of other reservoirs in the region. But the inflow is around 33 MAF/year. So the reservoir storage amounts to less than 0.5 years of average annual flow. The relatively low storage is responsible for the close match of inflow and outflow shown in the chart above. (Reservoirs that operate in this fashion are sometimes called "run-of-the-river" reservoirs.) The height of water at the President's Lake dam is 600 feet when the lake is full. There are no evaporation losses from this reservoir since it is located in an area with more rainfall. The hydro-electric power production depends on the flow through the turbines and the height of water at the dam. Much of the power is generated in April and May because of the high flows shown in the spring. |
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