DEPARTMENT OF THE ARMY
ETL 1110-2-540
U.S. Army Corps of Engineers
Washington, DC 20314-1000
CECW-EH-Y
Technical Letter
No. 1110-2-540
30 September 1996
Engineering and Design
HYDROLOGIC ASPECTS OF FLOOD WARNING - PREPAREDNESS PROGRAMS
1. Purpose. This ETL provides guidance for conducting hydrologic engineering analysis for flood
warning-preparedness programs.
2. Applicability. This guidance applies to HQUSACE elements and USACE Commands having civil
works responsibilities.
3. General. Procedures described herein are considered appropriate and usable for hydrologic
engineering and planning studies involving flood warning - preparedness programs. General concepts
of flood warning - preparedness programs, flood-threat recognition, warning dissemination, emergency
response and plan management are described. Flood hazard analysis and evaluation of existing
programs are also discussed. This ETL describes the components and terminology involved with flood
warning - preparedness programs. It provides a guide for plan, design, and implementation of flood
warning programs associated with flood damage reduction studies. Emphasis is on the hydrologic
engineering analysis requirements of evaluating and implementing flood warning-emergency response
programs. References and a glossary of terms, information on raingage location, examples of
quantitative precipitation forecast, sample hardware, and system costs are included in Appendices A
through E.
FOR THE DIRECTOR OF CIVIL WORKS:
5 APPENDIXES
STEVEN L. STOCKTON, P.E.
(see Table of Contents)
Chief, Engineering Division
Directorate of Civil Works
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