CECW-EH-Y Department of the Army EM 1110-2-1419U.S. Army Corps of EngineersEngineer Manual Washington DC 20314-1000 31 January -2-1419Engineering and DesignHYDROLOGIC ENGINEERINGREQUIREMENTS FOR FLOOD DAMAGEREDUCTION STUDIESDistributionRestrictionStatementApproved for public release; distribution isunlimited.
HydrologicEngineering RequirementsforFlood Damage Reduction Studies
ENGINEER MANUAL
HYDROLOGICENGINEERINGREQUIREMENTSFOR Engineering and Design FLOODDAMAGEREDUCTIONSTUDIES
1. Purpose. This manual presents basic principles and technical procedures for hydrologic engineer-ing analysis of flood damage reduction measures.
2. Applicability. This manual applies to HQUSACE elements major subordinate mands districts laboratories and field operating activities (FOA) having civil works responsibilities.
3. General. Procedures described herein are considered appropriate and useable for hydrologicidentifies requirements for properly sizing locating operating and maintaining flood damage reductionmeeting the plan evaluation needs.
engineering analyses required for planning and design of flood damage reduction measures. Basic concepts and procedures for analyzing selected flod damage reduction measures are presented.Emphasis is placed on hydrologic engineering analyses required for economic evaluations andperformance criteria associated with various measures. The manual overviews the planning problem measures. The without-project conditions and measure-specific requirements are defined. Appendices sed d ndo zurs pe e eoe o spod
FOR THE COMMANDER:
Chapter3
Without-Project Conditions
Chapter4
IntroductionPurpose Applicability 1-1 1-2 1-1 1-1Flood Damage Reduction References 1-3 1-1Planning Problem t-1 1-1Corps Procedure for Finding a Solution to the Planning Problem 1-5 1-2Role of Hydrologic Engineering Hydrologic Engineering Study Design 1-6 1-7 1-3 1-3
Engineering Requirements Summary 2-1 2-1Study Setup and Layout 2-2 2-1Requirements for Evaluating the NED Contribution 2-3 2-2Requirements for Satisfying Performance Standard 2-4 2-6Requirements for SatisfyingEnvironmental-Protection Standard .. 2-5 2-7
Overview 3-1 3-1Layout Technical Analyses 3-2 3-3 3-1 3-1
ReservoirsOverview Applicability 4-2 4-1 4-1 4-1Reservoir Operation Overview Discharge-Reduction Assessment . . 4-3 4-4 4-2 4-2
U.S.Army Corps of Engineers DEPARTMENTOFTHEARMY Washington DC 20314-1000
HYDROLOGICENGINEERINGREQUIREMENTS Engineering andDesign FORFLOODDAMAGEREDUCTIONSTUDIES
Table of Contents
Chapter5 Diversions
Chapter6
Channel Modifications
Chapter7
Levees and Floodwalls
Performance Considerations 4-5 4-3Dam Safety Evaluation 4-6 4-5Environmental Impacts 4-7 4-5
Overview 5-1 5-1Applicability Diversion Operation Overview 5-3 5-2 5-1 5-2Discharge-Reduction Assessment 5-4 5-2Technical Considerations 5-5 5-3
Overview 6-1 1-9Applicability 6-2 1-9Channel Overview Stage-Reduction Assessment 6-4 6-3 6-2 6-3Incidental Impact of Channel Modifications 6-5 6-3Technical Considerations 6-6 -9Capacity-Exceedance Analysis Environmental Impact 6-7 6-8 9 6-5
Overview Applicability 7-2 7-1 7-1 7-1Flood Damage Reduction Levee and Floodwall Overview .7-3 7-2Assessment 7-4 7-2Interior-Area Protection Design Exceedance 7-5 7-6 7-3 7-5Other Technical Considerations .7-7 7-5
Chapter 10Plan Evaluation System Analysis 10-1 10-1Economic-Objective Evaluation for System 10-2 10-1
Chapter 8 Other Measures That Reduce Existing-Condition Damage Susceptibility
Overview 8-1 8-1Requirements for Floodproofing 8-2 8-1Requirements for Flood Requirements for Relocation 8-3 8-4Warning-Preparedness Plans 8-4 8-5
Appendix A References
Appendix BCommonly Used ComputerModels for Corps Flood Damage Reduction Studies
Future-Condition Damage Chapter9 Measures That Reduce Susceptibility
Overview 1-6 9-1Requirements for ConstructionRequirements for Acquisition and Land-Use Regulation 9-2 9-3 9-1 9-2
