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<br />c. Upon completion of the update to the Wild Rice River basin HMS model by USACE, <br />perform final model runs. Perform work that can be accomplished in advance to <br />prepare for the final HMS models runs. <br />d. Use the HMS results as input for an updated unsteady HEC-RAS model run for each <br />storm centering. Complete the existing scope of work (Subtask F.V) for the PMF <br />study using the updated unsteady HEC-RAS model runs. <br />e. Prepare a report section documenting the GIS/HMS-based runoff-determination <br />effort and comparing the 1985 PMF study to this current study, including input <br />assumptions. Incorporate this draft report section into the overall current PMF <br />study report. <br />f. Conduct model runs as requested by USACE to support close out of comments from <br />ITR. Assume 6 additional sensitivity runs will be made as identified in the reviewer <br />comments. <br />g. Provide map making and figure revisions for final report. Assume two iterations of <br />revisions will be made to maps currently in report and two additional maps to be <br />made to satisfy the review comments. <br />h. Support report documentation as requested by USACE lead. Assume that USACE <br />will finalize the draft report and HMG will provide supplemental information. <br /> <br />III. Deliverables <br />a. Updated runoff grids resulting from the GIS/HMS-based runoff-determination <br />effort. <br />b. Draft report with maps. <br />c. Updated HMS models (16 models: 2 storms centering for 8 sub-basins.) <br />d. Updated unsteady HEC-RAS models (2 models, one for each storm centering). <br /> <br />K. PHASE 8 MODEL UPDATE <br />I. Background: <br />a. The Phase 8 modeling will incorporate higher volume hydrology developed by the <br />USACE. It will also include the development of the 20-year event model and <br />investigate additional model updates in the staging area based on culvert <br />connections, connecting channel investigations, and tieback embankment <br />alignment adjustments. The downstream model limit will be Drayton, ND. <br />b. The most recent independent QA/QC review of the FM Diversion project unsteady <br />HEC-RAS model occurred during the Phase 4 modeling (February 28, 2011). <br />Subsequent model updates included peer reviews by modelers, but did not <br />included a full independent review. <br />II. Scope: <br />a. Update geometry in the upstream staging area based on culvert details and the <br />local drainage plan (currently under development). <br />b. Update synthetic model hydrology for the 10, 50-, 100-, and 500-year flood events <br />and develop new 20-year hydrology using new higher volume hydrographs <br />developed by the USACE for the peak Red River flood event. Local inflow <br />development will utilize the Phase 1 HEC-HMS models. <br />c. Update the existing conditions tributary peak unsteady model using updated <br />hydrology developed by the USACE for the 10-, 50-, 100-, and 500-year flood events <br />and new 20-year hydrology. <br />HMG_TO9-A13_Long.docx 14 <br />DR <br />A <br />F <br />T <br /> <br />3/6 <br />/ <br />2 <br />0 <br />1 <br />5 <br />