U.S. Department of Commerce/National Oceanic and Atmospheric Administration/OFA/AGFS/AMD -- OFA51, 1305 East West Highway -- Station 7604, Silver Spring, Maryland 20910

A -- RESEARCH & DEVELOPMENT SOL 0A-NWWC-0100 DUE 062700 POC Lawrence B. Frazier, (301) 713-0851, Vivian K. Smith, (301) 713-0853 E-MAIL: click here to reach Vivian Smith, Vivian.K.Smith@agf.noaa.gov. A -- The U.S. Department of Commerce/NOAA/National Weather Service/ Office of Hydrology intends to procure on a sole source basis from the Hydrologic Research Center services for intercompare unit hydrograph methods. The intercompare unit methods are for regions where flash flooding is significant within the United States. The intercomparison will identify the most appropriate unit hydrograph method to use for the production of improved threshold runoff on a national basis, which in turn are key parameters for computing Modernized Flash Flood Guidance being developed by the Office of Hydrology (OH), Hydrology Laboratory (HL), for the National Weather Service (NWS). The contractor will identify 20-30 basins in the eastern United States for which the inter- comparison will take place, and development of relevant databases for a calibration and a validation dataset. The contractor will develop unit hydrograph chacteristics from available observed rainfall and runoff data. Use of GRASS-HRC ThresR to estimate hydrologic parameters for the study basins on the basis of 30m digital terrain elevation data, and intercomparison of these hydrologic basin measures with analogous ones produced by HL staff using HL software and GIS input from HRC. The contractor will calibrate the parameters Cp and Ct of Snyder's Unit Hydrograph (SUB) for the calibration dataset. The contractor will obtain geomorphologic unit hydrograph ((GUH) parameters for the calibration dataset. All documents delivered under this contract will be delivered in electronic form using Corel Office 8 tools as agreed by the COTR and will be delivered to the COTR at 1325 East West Highway, Silver Spring, Maryland. This is a notice of intent. No solicitation document is available. Award will be made under Simplified Acquisition procedures. OA-NWWC-0100. Posted 06/12/00 (W-SN463748). (0164)

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