Laserfiche WebLink
<br />. <br /> <br />Simulated Operations <br /> <br />To determine system yield, the model is run over the study period at a trial level of <br />customer water demand. If the simulation ends with surplus water in the storage <br />reservoirs throughout the time period, the run is repeated at an increased level of <br />customer water demand. Conversely, if the simulation indicates that the trial level of <br />customer water demand cannot be met at all times, the run is repeated at a reduced level <br />of demand. This iteration continues until the model simulation shows the reservoir <br />storage dropping to zero and immediately thereafter beginning to refill without causing <br />any shortfall in meeting demand. Modeled reservoir contents for the existing collection <br />system are shown in Figure III-3. This figure shows the combined end-of-month <br />contents for Denver Water's storage reservoirs for each April from 1947 ihrough 1991. <br />April is shown because it is gene rail y the month in which Denver's reservoirs are at their <br />lowest level. The model simulation using today's 345,000 acre-foot baseline supply <br />shows the reservoirs were empty sometime within the month of April 1957 and then <br />began to refill; all demands were met. The customer water demand on which this pattern <br />of reservoir levels is based is 345,000 acre-feet per year which defines Denver Water's .' <br />current system yield. Thus, the current collection system can meet a customer water <br />demand of 345,000 acre-feet, assuming a hydrologic and climatological cycle identical to <br />that of water years 1947 through 1991. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />Figure III.3 <br /> <br />. <br /> <br />Modeled Reservoir Contents <br />(345,000 acre-feet/year) <br /> <br />500,000 <br />450,000 <br />400,000 <br />il 350,000 <br />"" <br />~ 300,000 <br />" <br />..: 250,000 <br />200,000 <br />150,000 <br />100,000 <br />50,000 <br />o <br />1947 1951 1955 1959 1963 1967 1971 1975 1979 1983 1987 1991 <br /> <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />Water Year <br /> <br />Reusable and Non-reusable Water <br /> <br />. <br /> <br />All water delivered to Denver's customers can be classified as reusable or non-reusable. <br />Reusable water can be successively reused and is fully consumable, meaning that no <br /> <br />16 <br /> <br />. <br />