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Show Final Report Hydrologic Model Analysis of the Provo River Basin Each water right was assigned a relative ranking associated with its priority for diversion. A low rank corresponds to high or early priority, while a high rank corresponds to low or late priority. PROSIM allocates water to lower numbered rankings prior to allocating water to higher numbered rankings. In times of water shortage, equivalent rankings share in the allocation of available water in proportion to the relative diversion rate of their right. The rankings were developed in accordance with paragraph 121 of the Decree. 2.4.3 Analysis of Institutional Arrangements Institutional arrangements are contracts, operating agreements, and delivery or allocation practices that may not strictly be water rights, but do have direct impacts upon water rights and how they are administered. Institutional arrangements describe the rules and agreements used to operate the Provo River system or a component of the system, and, in certain respects, are more important than the water rights themselves. Accurate modeling of institutional arrangements permits the model to simulate how the system truly operates. Modifying how these arrangements are modeled helps to demonstrate the importance of each arrangement, and the critical nature of its interpretation or application in the prototype. Twelve of the most significant issues, specifically defined by institutional arrangements are listed below. • Provo River Class Rights • Utah Lake Distribution Plan • Deer Creek Reservoir/ Jordanelle Reservoir Operating Agreement • Diversion of System Storage • Conversion of System Storage to Priority Storage • Instream Flow Requirements • River Losses • Olmsted Facility Priority of Use • Deer Creek Reservoir Accounting • Jordanelle Reservoir Accounting • Utah Lake Accounting • Utah Lake Water Rights Some of these arrangements are quite involved. The Utah Lake Distribution Plan, for example, affects each of the others and controls how most of the water on the River is stored, owned, and used. The Deer Creek/ Jordanelle Operating Agreement controls the storage, the allocation of storage, and exchanges of water between the two reservoirs. Although this agreement was finalized in late 1994, after most of the programming was completed, the provisions of the agreement, to the extent they are applicable to a monthly timestep, have been included in the model. Each of the January 1998 Page 16 |
