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US Army Corps of Engineers Hydrologic Engineering Center Statistical Methods in Hydrology January 1962 TD-4 Approved for Public Release. Distribution Unlimited. REPORT DOCUMENTATION PAGE Form Approved OMB No. 0704-0188 The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to the Department of Defense, Executive Services and Communications Directorate (0704-0188). Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ORGANIZATION. 1. REPORT DATE (DD-MM-YYYY) 2. REPORT TYPE 3. DATES COVERED (From - To) January 1962 Training Document 4. TITLE AND SUBTITLE 5a. CONTRACT NUMBER Statistical Methods in Hydrology 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S) 5d. PROJECT NUMBER Leo R. Beard 5e. TASK NUMBER 5F. WORK UNIT NUMBER 7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) 8. PERFORMING ORGANIZATION REPORT NUMBER US Army Corps of Engineers TD-4 Institute for Water Resources Hydrologic Engineering Center (HEC) 609 Second Street Davis, CA 95616-4687 9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSOR/ MONITOR'S ACRONYM(S) 11. SPONSOR/ MONITOR'S REPORT NUMBER(S) 12. DISTRIBUTION / AVAILABILITY STATEMENT Approved for public release; distribution is unlimited. 13. SUPPLEMENTARY NOTES . 14. ABSTRACT This publication described and illustrates the application of statistics in hydrologic engineering, especially flood frequency analysis. The subject matter covers the following items: (1) A review of the basic concepts of probability and correlation analyses that is applicable in hydrologic engineering, with a guide to supplemental reading. (2) Presentation of detailed computation procedures and computation aids for derivation of frequency estimates based on analysis of hydrologic record. (3) A summary of procedures for developing "regionalized" hydrologic frequency estimates, based on analyses of hydrologic records available at stream gaging stations, adjusted to provide generalized flood-frequency relations that are considered to be representative of long-period hydrologic characteristics. 15. SUBJECT TERMS hydrology, analytical techniques, statistical methods, frequency analysis, flood frequency, regression analysis, regional analysis 16. SECURITY CLASSIFICATION OF: 17. LIMITATION 18. NUMBER 19a. NAME OF RESPONSIBLE PERSON a. REPORT b. ABSTRACT c. THIS PAGE OF OF U U U ABSTRACT PAGES UU 130 19b. TELEPHONE NUMBER Standard Form 298 (Rev. 8/98) Prescribed by ANSI Std. Z39-18 Statistical Methods in Hydrology January 1962 US Army Corps of Engineers Institute for Water Resources Hydrologic Engineering Center 609 Second Street Davis, CA 95616 (530) 756-1104 (530) 756-8250 FAX www.hec.usace.army.mil TD-4