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Show Final Report Hydrologic Model Analysis of the Provo River Basin allocation, and rights to call on water stored in multiple reservoirs. Each water source or right is assigned a specific priority, and available water is drawn from the sources in order until the user's entire demand is satisfied. Model calculations proceed in priority order until each water right, hydrological process, institutional arrangement, operational rule, and user demand has been satisfied. The model timestep is then incremented, and the process begins again. 1.3.3 Modeled Processes The PROSIM model is a flexible water accounting tool, capable of simulating the allocation of the available water supply of a river system according to user demands, water right priorities, and various sets of special operating rules associated with institutional arrangements. The primary function of the model is to estimate the volume of water that, under a given set of operational rules, can be allocated and diverted to each water user, stored in each reservoir, or retained in the river. PROSDVTs prioritized simulation capabilities include the following: Water Rights • Priority- order, direct- flow diversions from the main channel or tributaries • Equalized allocation during times of shortage ( meaning that, during times of shortage, all users owning rights at the same priority share equally, in proportion to their water right diversion rate) • Diversions to and from reservoir storage • Allocation of water for non- consumptive uses • Reservoir releases for minimum instream flow requirements ( IFRs) Institutional Arrangements • Replacement between upstream diversions and downstream reservoirs • Upstream storage of water by replacement from downstream reservoirs • Exchanges between reservoir users in the same or different reservoirs • Recapture of reservoir releases used to satisfy IFRs • Rediversion of reservoir releases or natural flows to meet non- consumptive uses • Transbasin diversions by direct diversion, reservoir replacement, or exchange The model also currently includes over 50 other detailed water distribution rules. Hydrological Processes • Diffuse ( throughout reach) inflow and tributary ( point) inflows • Reservoir evaporation, precipitation, and seepage losses and gains January 1998 Page 6 |
