| INFLOW American Lake receives the combined inflow of the Main Fork and the North Fork of the Idagon. The in-flow averages 10 MAF/year. The month by month variations in the inflow are illustrated in the chart. The peak inflow appears in April during the spring runoff. The inflow declines to under 5 MAF/yr in the summer months and returns to the average value by November. OUTFLOW The outflow must meet the minimum flow requirement specified from the controls of the flight simulator. The chart assumes that the minimum flow is set at 3 MAF/year. The outflow matches this target during the Winter and Spring months. The outflow is much higher during the summer irrigation season. |
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| The irrigation season begins in May and extends over a 4 month
period which includes half of May, all of June, July and August and half
of September. The out flow is over 23 MAF/year during this season. This
outflow is calculated to serve as much of the irrigated lands in Area 1
as possible with the flows that are available in the current year. When experimenting with the model, you may open the graph "In_and_Out_Flow_1_American_Lake" to see if the simulated flows are similar to the illustration shown below. AMERICAN LAKE DIMENSIONS The reservoir storage capacity is 18 MAF or 1.8 years of average annual flow. The lake's surface area is 90,000 acres when the lake is full. The height of water at the dam is 300 feet when the lake is full. The net evaporation rate in this region is 2 feet/year, so the evaporation losses from American Lake amount to around 180,000 AF/yr or roughly 0.2 MAF/year. Thus, evaporation losses should be under 2% of the annual flow. The hydro-electric power production from the American Lake dam depends on the flow through the turbines and the height of water at the dam. Most of the power is produced during the summer months when high outflows are needed for irrigation. |
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