Laserfiche WebLink
<br />...-.'..,-,.,;,,);;;,. <br /> <br />· Task IIIa-2 <br /> <br />White River Basin Model Enhancement <br /> <br />Objective: The RTi modeling group under the State's guidance will enhance the White River Basin <br />Model to include the approximately 25 percent of current water use which was left "in the gage" in the <br />Phase II model. Additional diversions and storage structures will be aggregated to produce a <br />manageable data set and to avoid significantly degrading computational perfonnance. The final model <br />will be calibrated and documented, The State is responsible for the completion of the tasks described <br />below with RTi's involvement at the specified level of effort. <br /> <br />Prerequisite: The Phase II White River Basin model is documented and calibrated with <br />approximately 75 percent of the current water use Il).odeled and with irrigation demands based on the <br />1993 GIS mapping in the calculated scenario, <br /> <br />Assumptions: - Study period of enhanced models will be 1975 through 1991. <br />Total irrigation consumptive use is defined as the conswnptive use associated with the <br />irrigated acreage estimates from the 1993 assessment. Structures and water rights not tied to irrigated <br />parcels will not be included in the models but will be documented as being excluded. <br /> <br />. <br /> <br />Task Leader: Ray Bennett (State) <br />Principal RTi staff: RTi water resource engineer (Bill Owen)...,RTIWR <br /> <br />Task 2.01 <br /> <br />Phase II Instream Flows <br /> <br />Objective: Modify Phase II model input to reflect changes in the way instreanl flow reaches are <br />specified to StateMod. This Task brings the model application into conformance with tlle current <br />version of the code before the application itself is enhanced, <br /> <br />Approach: <br />1. STATE: Modify the StateMod program to consider upstream and downstream terminus of <br />instream flows to avoid the current necessity of duplicating the same instream flow below each <br />structure in the reach. <br />2. RTIWR: Modify Phase II 'historic', 'calculated', and 'baseline' data sets to reflect a dual terminus <br />treatment of instreanl flow reaches, Specifically, change the river network file to remove "extra" <br />instream flow nodes, edit or recreate the .dds file as necessary, and edit instream flow files to reflect <br />new data input format. Return flow locations should be reviewed and changed if necessary to make <br />sure that every return flow re-enters the stream at an existing node. <br />3. RTIWR: Execute the modified model with the Phase II 'calculated' and 'historic' scenario demand <br />set. With the "big picture plot" feature of the StateMod GUI, prepare a single big picture plot <br />comparing (annual average diversion) for the modified model output to the Phase II output. The big <br />picture plots will be supplied to the State, and if large differences are noted, the State will be <br />responsible for additional modifications or executions or comparisons (possibly requiring a change <br />order), <br /> <br />. <br /> <br />1178 <br /> <br />Phase II1a Scope of Services <br /> <br />A.6 <br /> <br />Jan31,1997 <br />