Colorado - Co Basin Nonconsumptive Needs Quantification_Statement of Work #2

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: Scope of Work.4-10-2009 Colorado River Basin Nonconsumptive Needs Quantificatio'n The Consultant team will complete the following elements for the hydrologic modeling: ■ Recommend conditions and assumptions used to generate hydrology from CDSS model to stakeholder group and get agreernent from stakeholder group on conditions ■ Assume that limited number of additional baseline nodes will need to be added based on stakeholder input but will be limited based on budgetary constraints with consideration of model simulation ■ Utilizing CDSS model, run baseline and current conditions hydrology for nodes agreed upon in Task 2.1 ■ Daily and monthly data will be generated from model for agreed upon nodes from Task 2.1 ■ Quality AssurancejQuality Control of model output ■ Review model output and compare to other hydrologic models in the basin if available. This assumes that other existing model output will be available from the model owner and that the Consultant team wi11 not have to simulate other existing models for model output. For baseline and current conditions, the Consultant team will calculate the following flow statistics that are related to aquatic ecology using IHA software or other methods in Excel: ■ mean annual flow (MAF) for each year and per record (1) ■ mean of Aug. and Sept. flow for each year and per record (2) ■ metrics in (2) above divided by metric (1) above, that is Aug + Sept average/ MAF ■ 30 day high flow (moving average across average daily flow series) for each year and average per record ■ annual peak flow (daily average) for each year and average per record ■ additional statistics may be developed based on geomorphic conditions in the watershed The Consultant team will prepare a memo that describes the model simulation conditions, model output and flow statistics. The memo will also address any quality assurance issues or concerns with the model simulation output and any comparison with other models. Task 2.4 Review Watershed Flow Evaluation Tool Ecological Flow Curves and GIS Mapping of Flow Statistics/Ecological Flow Curves Using Risk Framework Cost: $60,282 ($60,282 WSRA, $0 Match) The Consultant team will complete the elements for this task: ■ Review existing flow ecology curves and compare to relevant studies that have been conducted in the Colorado River Basin Page 6 of 15