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PGM J407 VER 3.7 (REV 11/5/81) 2- 740 u. S. GEOLOGICAL SURVEY ANNUAL PEAK FLOW FREQUENCY ANALYSI FOLLowING WRC GUIDELINES BULL. 17-B. EXECUTION BEGINNING AT DATE. TIME. 4123/82 1920 INPUT FORMAT = 1 wATSTORE PEAK FILE RETRIEVAL EXPLANATION OF PEAK DISCHARGE QUALIFICATION CODES J401 FILE D 3 G 8 X 3..8 , L 4 K 6 OR C H 7 MEANING DAM FAILURE. NON-RECURRENT FLOW ANOMALY DISCHARGE GREATER THAN STATED VALUE BOTH OF THE ABOVE DISCHARGE LESS THAN STATED VALUE KNOWN EFFECT OF REGULATION OR UABANIZATION HISTORIC PEAK REPORT TROUBLE TO WATSTORE USER ASSISTANCE. J407 -- REVISED FOR USE WITH w.R.C. BULLETIN 17-B. PEAK FLOW FILE RETRIEVAL VERSION PRINCIPAL CHANGES INCLUDE -- -- HIGH OUTLIER TEST -- MORE SENSITIVE LOw OUTLIER TEST -- STATION SKEW ADJUSTMENT FOR LOW OUTLIERS AND ZERO FLOwS -- WEIGHTED AVERAGING OF STATION AND GENERALIZED SKEWS IN INVERSE PROPORTION TO ESTIMATED MEAN SQUARE ERRORS. B/I/B1 FOR DETAILS. SEE ~ATSTORE USER'S GUIDE. VOL.4. CH.I (1981 REVISION). SEC.C. NO CHANGES IN JOB INPUT PREPARATION ARE REQUIRED IN RETRIEVAL MODE MINOR CHANGES MAY BE REQUIRED IN STANDALONE (CARD INPUT) MODE. , NOTE-- IN STANDALONE MODE (CARD INPUT). A NEw FORMAT IS USED FOR HISTORIC AND OUTLIER INFORMATION. SEE WATSTORE USER'S GUIDE. VOL~4. CH.I. SEC.C.2.K (1981 REVISION). ~O CHAN~E IS NEEDED FOR STATIONS HAVING NO HISTORICIOUTLIER INFORMATION. NOTE -- IN STANDALONE MODE. USE REGION=140K ON THE EXEC CARD. NOTE -- SUMMARY OUTPllT IS PRODUCED BY DEfAULT. UNLESS SUPPRESSED BY THE NOBC OPTION,. (BCPU IS THE DEFAULT OPTION.) BCPU OUTPUT ORDINARILY GOES TO A TEMPORARY DATA SET NAMED "BCCARDS. wHICH IS