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<br />~ <br /> <br />~ <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />will influence reservoir behavior. In addition to being governed by <br />the priority system and location within the model network, storage and <br />release from reservoirs may be controlled by operating rules. The <br />model also accounts for reservoir evaporation and its relationship to <br />reservoir storage volume and surface areas. <br /> <br />2. Operation Studies <br /> <br />a. Objective <br /> <br />The objectives of the reservoir simulation operational studies are <br />to provi de an estimate of the increased water that woul d resul t if <br />both dams are repaired, pennitting full use of available storage. <br />Project storage rights are junior to the some of the di rect f1 ow irri- <br />gation canals in the valley, and the model attempts to emulate the <br />abil ity of the two storage reservoirs to store water after senior <br />rights in the watershed have been satisfied. However, the model does <br />not simulate the conjunctive use of the unconfined aquifer which is <br />one of the most important aspects of actual irrigation practices <br />within the San Luis Valley. After detailed review and trial rode 1 <br />runs, it was found the model would provide the required infonnation on <br />potential increased yield but without including the groundwater aquifer <br />1 ink. The model did not attempt to identify increased storage oppor- <br />tunities attributable to the above described agreement wi th the State <br />Engineer nor the enhancement in yield attributable to the Closed Basin <br />Project. <br /> <br />IV - 14 <br />