Laserfiche WebLink
<br />. ""\".\. <br />[P l' ., / '" <br />u.U,U,v, ~ <br /> <br />The Resident Pnwer and Reservoir System Model (PRSYM) <br /> <br />the generation. It must also be possible to specify a generation schedule and solve for <br />release. <br /> <br />Additionally, PRSYM must support the specification of hydropower generation as a <br />constraint on the simulation for individual projects or groups of projects. At each <br />project, it should be possible to specify a minimum hydropower generation (which <br />translates to a minimum release as a function of effective head). The user may also <br />require a minimum generation constraint for a group of projects. In this case, each <br />project must meet its minimum and maximum limits, and the sum of the projects' <br />generation must, if possible, meet the collective constraint. <br /> <br />A methodology should be available for the disaggregation of generation output to a <br />minimum of peak and off-peak components. It must also be possible to estimate the <br />maximum and minimum hourly generation. <br /> <br />Energy-In-Storage <br /> <br />Based on current elevations and unit characteristics, the model must be capable of <br />determining project and system energy-in-storage. Energy-in-storage is a measure of <br />the potential energy associated with the amount of storage in a particular reservoir <br />when that water is utilized to generate hydropower at that project and all downstream <br />projects. <br /> <br />Water Temoerature and Ouality <br /> <br />PRSYM must include a module for providing general water quality information. The <br />model residing in this module must be capable of computing 'first cut' water <br />temperature and dissolved oxygen (DO) in the reservoir system simulated by <br />PRSYM. <br /> <br />The water quality model must be able to solve the unsteady continuity and transport <br />equations for the system's reservoirs. The hydrodynamic information (e.g., flow, <br />water surface elevation) required by the model will be provided by PRSYM. The <br />simulation timestep for the water quality model will be on the order of one day to <br />capture weekly trends in ,critical areas of the system. At the minimum, the water <br />quality model must provide temperature and DO profiles in the longitudinal direction. <br /> <br />The primary processes to be formulated in the water quality model are: <br /> <br />· multiple heat and flow input, <br />· variable density effects (i.e., thermal stratification; mixing, and exchange), <br />· temperature dependence of DO processes, <br />· atmospheric heat and gas exchange, <br /> <br />3-7 <br />