ETL 1110-2-540
30 Sep 96
programs and to ensure their validity of operation on
Chapter 1
a real-time basis during flood events. For feasibility
Introduction
studies, the base conditions and enhancements are
determined and compared.
Base condition analyses
estimate the nature of the flood hazard for a range of
events (magnitude, frequency, inundation boundaries,
1-1. Overview
velocities, depths, and warning times). These analyses
determine impacts to threatened properties, vital services,
a. Flood warning - preparedness programs are designed
and define the existing flood warning - preparedness
so that flood emergency response actions are conducted effi-
program activities and operations. Hydrologic analyses are
ciently and in an organized manner. These programs reduce
integral to this analysis. Enhanced condition analyses
the risk to life and, to some extent, reduce the damage poten-
include arrangements, equipment, hardware/software, and
tial during flood episodes. Flood warning - preparedness
actions that yield better responses. The analyses may
programs do not prevent flood disasters but do enable institu-
include enhanced and more reliable warnings, better
tional and public emergency response actions to be conducted
warning dissemination, and response actions that reduce
effectively. Many institutional arrangements required for
the threat to people and property damage.
implementing flood warning - preparedness programs are
similar to those for other disasters.
e. This manual describes the components and
terminology involved with a flood warning - preparedness
b. Flood warning - preparedness programs are viable
program. It provides a guide for planning, design, and
flood damage reduction measures that serve as stand-alone
implementation of flood warning - preparedness programs
measures when other alternatives are not feasible, components
associated with flood damage reduction studies. Emphasis
to other measures, or interim measures until other structural or
is on the hydrologic engineering analysis requirements of
nonstructural alternatives are implemented. Flood warning -
evaluating and implementing flood warning-emergency
preparedness programs are coordinated actions that include
response programs.
flood-threat recognition, warning dissemination, emergency
response, postflood recovery, and continued plan
1-2. Organization
management.
This document is organized in the sequence of topics
c. A flood warning - preparedness program may reduce
needed to formulate and evaluate a flood warning -
the risk to life and temporarily modify flood damage suscepti-
preparedness program.
These topics include general
bility. These measures must be considered in the formulation
concepts, defining the problem, developing alternative
of any flood damage reduction plan (ER 1105-2-100). Under
solutions, and recommending a plan for implementation.
feasibility investigations, flood warning - preparedness pro-
Chapter 2 describes general concepts of flood warning -
grams cost sharing includes: determination of the flood haz-
preparedness programs. Chapter 3 describes how to define
ard; selection, siting, installation, and hardware and
existing or base conditions. Chapter 4 describes how to
equipment; and definition of threatened area. It does not
review and recommend enhancements to the base
include the development of emergency response plans that are
condition.
Chapter 5 describes flood warning -
local responsibilities. Under the Flood Plain Management
preparedness plan implementation, operation, and mainte-
Services (FPMS) program, the Corps provides technical
nance. Appendix A is a list of references, and Appendix
assistance to local communities for developing flood warning -
B is a glossary of terms. Appendix C includes information
preparedness programs upon request. The Corps can provide
on rain gage exposure published by the National Weather
assistance in developing response plans, but the local sponsor
Service (NWS).
Appendix D includes an example
is responsible for purchasing required hardware and software.
quantitative precipitation forecast (QPF). Appendix` E
contains sample initial costs for an automated flood-threat
recognition system, respectively.
feasibility of implementing flood warning - preparedness
1-1
Previous Page
