PROGRAMS AND PLANS - Updating the Rainfall/Runoff Model Files In Reply Refer To: August 22, 1975 EGS-Mail Stop 415 SURFACE WATER BRANCH TECHNICAL MEMORANDUM NO. 76.04 SUBJECT: PROGRAMS AND PLANS - Updating the Rainfall/Runoff Model Files The calibration data (daily rainfall, unit rainfall, and unit discharge) in the Rainfall/Runoff Model Files are a permanent part of the Geological Survey's data files which are available to the public. These data will continue to be used by the Water Resources Division as our research in runoff processes continues. For these reasons, only reliable and useful data should remain a permanent part of these files. After completion of satisfactory calibration of the rainfall/runoff model, the files should be updated such that the daily rainfall data are complete and the unit data files contain only storm-flood events used in the calibration. All unnecessary data should be deleted from the files. Deletion of unnecessary and erroneous data may be done by using program A602-Rainfall/Runoff data update (Chap. 8, Users Guide for a U.S. Geological Survey Rainfall/Runoff Model, by C. W. Boning, 1974). Please advise the Chief of the Surface Water Branch, by memorandum, when updating for each station operated in your district has been completed. Harry H. Barnes, Jr. Chief, Surface Water Branch WRD Distribution: A, B, FO-L