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DESIGN RAINFALL STATISTICS <br />For Colorado Using NOAA Atlas 2, Volume III <br />Version 1.01a, Released July 2005 <br />Urban Drainage and Flood Control District <br />Denver, Colorado <br />Purpose: <br />This workbook applies the NOAA Atlas 2, Volume III to derive design <br />rainfall statistics and create Depth- Duration- Frequency (DDF) tables, <br />and Intensity- Duration- Frequency (IDF) tables. <br />Function: <br />1. Defines the four hydrologic zones for the state of Colorado. <br />2. Allows construction of DDF and OF tables for the project site <br />based on the project area's hydrologic zone and elevation. <br />Content: <br />The workbook consists of the following six sheets: <br />INTRO Describes the purpose of each sheet in the workbook. <br />Zone Colorado hydrologic zone map. <br />Z -1 DDF and IDF Tables for Zone 1. <br />Z -2 DDF and IDF Tables for Zone 2. <br />Z -3 DDF and OF Tables for Zone 3. <br />Z4 DDF and OF Tables for Zone 4. <br />Acknowledgements: Spreadsheet Development Team: <br />Dr. James C.Y. Guo, P.E. <br />Professor, Department of Civil Engineering <br />University of Colorado at Denver <br />Ken A. MacKenzie <br />Urban Drainage and Flood Control District <br />Wright Water Engineers, Inc. <br />Denver, Colorado <br />Comments? <br />Direct all comments regarding this spreadsheet workbook to: UDFCD E -Mail <br />Revisions? <br />Check for revised versions of this or any other workbook at: Downloads <br />Copy of UD- RainZone 0.01a, INTRO 3/312010, 9:43 AM <br />