Version History for Open-File Report 2009-1171 Toby D. Feaster and Wladmir B. Guimaraes Low-Flow Frequency and Flow Duration of Selected South Carolina Streams in the Pee Dee River Basin through March 2007 ------------------------------------------ Posted online September 29, 2009 ------------------------------------------ Revised and reposted June 22, 2010 ------------------------------------------ Descriptions for variables in equation 3 on page 11 were found to be incorrect and were updated. The authors recommend that previous versions of the report be deleted and the new version be downloaded. ------------------------------------------ Revised and reposted May 18, 2010 ------------------------------------------ After the initial release of this report, the U.S. Geological Survey Office of Surface Water informed the authors of ongoing research related to the application of the MOVE.1 record extension technique (written commun., Julia E. Kiang, Jan. 26,2010). As a result, numerous changes have been made to this report with respect to the application of the MOVE.1 technique. The authors recommend that if you downloaded the original report file you delete it and download the new report file. Page 1, Abstract: Number of stations decreased from 18 to 17 due to not including station 02131320 (which based on the new criteria, was not analyzed like a PR station because of zero flows). Figure 3: Removed station 02131320. Table 4: Lynches River subbasin stations decreased from 5 to 4 due to removal of 02131320. Table 5: Removed station 02131320; remove MOVE.1 remarks from stations 02131500 and 02135500, which are not being extended based on new extension criteria. Page 10: Updated equation 2 as follows: Padj = (N/n)Pn - ((N-n)/n) Page 11, Record Extension Technique: changed daily mean flow wording to N-day. Page 12: Updated text to expand on new record extension criteria; replace figure 7 with figure showing 7-day data correlation; remove stations 02131500 (less than a 10% difference in low-flow statistics at index station for concurrent period and complete record) and 02135500 (zero flows) from table 7; on table 7, changed ãCorrelation Coefficientä heading to ãRange of Correlation Coefficientä and updated coefficients for 02130561 and 02132500. Page 13, Partial-Record Type Analysis: Additional text added and stations that are now not being extended were removed from text; updated Table 8. Page 14: Replaced figure 8; Added additional text in the Flow-Duration Analysis section. Page 16: Removed station 02131320 from table 9; Updated other data in table 9 for stations 02130561, 02130980, 02131500, 02132500, and 02135500. Page 17, Summary: Changed reference of 18 stations to 17 stations analyzed. Page 27, Table 2: Removed station 02131320. Page 29, Table 2: Updated information for station 02131500. Page 31, Table 2: Updated information for station 02132500. Page 34, Table 2: Updated flow-duration information for station 02135500. Page 38, Table 3: Updated information for station 02130561. Page 40, Table 3: Updated flow values for station 02130980.