Skip to content
Open
Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
61 commits
Select commit Hold shift + click to select a range
ea5dc01
Added citation, figure, and table references for 01 through 04. Start…
suzbyrd94 Mar 12, 2026
6c125d6
- General text edits
suzbyrd94 Mar 13, 2026
3e72919
Merge branch 'docs/applications-guide' of https://github.com/USACE-RM…
suzbyrd94 Mar 16, 2026
0847059
-general text edits
suzbyrd94 Mar 16, 2026
6e8e3b0
- text edits
suzbyrd94 Mar 17, 2026
88b609a
New Figure test with Susie
karenmai-usace Mar 18, 2026
ff6f3c6
Merge branch 'docs/applications-guide' of https://github.com/USACE-RM…
karenmai-usace Mar 18, 2026
60ca4df
Hi Susie test
karenmai-usace Mar 18, 2026
2186f63
-general text edits
suzbyrd94 Mar 18, 2026
dd30b8d
- added new figures
suzbyrd94 Mar 18, 2026
3c0e31a
Evac animation update in levee chapter
suzbyrd94 Mar 18, 2026
8623948
updated figures
suzbyrd94 Mar 24, 2026
8f26957
added new figures, troubleshooting resolution issues
suzbyrd94 Mar 24, 2026
3e84d86
-general text edits
suzbyrd94 Mar 24, 2026
a157e50
general text edits, figure additions
suzbyrd94 Mar 25, 2026
4f01f6a
text edits in the levee chapter
suzbyrd94 Mar 25, 2026
f59f012
- Added RMC LifeSim hyperlink to Preface's first mention of LifeSim t…
karenmai-usace Mar 26, 2026
f66ea0e
Merge branch 'docs/applications-guide' of https://github.com/USACE-RM…
karenmai-usace Mar 26, 2026
1778301
text edits
suzbyrd94 Mar 26, 2026
7466a3f
Merge branch 'docs/applications-guide' of https://github.com/USACE-RM…
suzbyrd94 Mar 26, 2026
d649a91
Fixed Figure 0/1 and added RAS citation
karenmai-usace Mar 26, 2026
c5f3e71
Merge branch 'docs/applications-guide' of https://github.com/USACE-RM…
karenmai-usace Mar 26, 2026
976db7d
text and content edits
suzbyrd94 Mar 26, 2026
62501d2
Merge branch 'docs/applications-guide' of https://github.com/USACE-RM…
suzbyrd94 Mar 26, 2026
8f1eadf
Switched the Applications Guide to the 2nd button spot for LifeSim pa…
karenmai-usace Mar 27, 2026
6497314
Editorial review through ## Purpose of 04-estimating-consequences-for…
karenmai-usace Mar 27, 2026
252bb89
Had Claude search for typos all pages except Summary Grids. Revised C…
karenmai-usace Mar 27, 2026
fe6f602
-content edits to summary grids chapter
suzbyrd94 Mar 27, 2026
e2bb54c
Merge branch 'docs/applications-guide' of https://github.com/USACE-RM…
suzbyrd94 Mar 27, 2026
b71bf4a
Fixed Claude-identified typos on Summary Grid page
karenmai-usace Mar 27, 2026
b109b94
replaced 'breach' with 'fail' throughout the guide
suzbyrd94 Mar 27, 2026
97b656b
updated table 4
suzbyrd94 Mar 27, 2026
947c6a2
Editorial review through ### Importing an Emergency Planning Zone of …
karenmai-usace Mar 27, 2026
2bd5d70
Merge branch 'docs/applications-guide' of https://github.com/USACE-RM…
karenmai-usace Mar 27, 2026
363631a
Renamed the mdx name of "breach" to "failure" update
karenmai-usace Mar 27, 2026
9584c69
Manual review through Levee chapter
karenmai-usace Mar 31, 2026
3cbdf7b
Save Edit inline image. Was missing.
karenmai-usace Mar 31, 2026
2451480
Manual review through ## Running a TestSim of Dam chapter
karenmai-usace Apr 1, 2026
9e2f3d9
-edits from Karen's review of the dam chapter.
suzbyrd94 Apr 2, 2026
71707b8
-added link to EP 1110-2-17 in Levee chapter
suzbyrd94 Apr 2, 2026
e65af0a
-updated tables in Planning chapter
suzbyrd94 Apr 2, 2026
b3d35a0
minor table edit
suzbyrd94 Apr 2, 2026
c652394
fixing mistake in table 7
suzbyrd94 Apr 2, 2026
d9b7abc
Dam page, through figure-136. Added a reference to User's Guide tools…
karenmai-usace Apr 2, 2026
82b4f74
Merge branch 'docs/applications-guide' of https://github.com/USACE-RM…
karenmai-usace Apr 2, 2026
697dc98
Finished dam page manual review.
karenmai-usace Apr 8, 2026
e084758
Finished manual review through Cascading Dam chapter. Made some <Link…
karenmai-usace Apr 8, 2026
e88b935
Finished manual review through Coastal chapter. Added transparent lay…
karenmai-usace Apr 8, 2026
116eba3
Finished manual review through Planning chapter. Finalized document i…
karenmai-usace Apr 9, 2026
e4097c2
Finished manual review through Economic Damages chapter. Mostly just …
karenmai-usace Apr 9, 2026
9253dfa
Finished manual review of entirety of App Guide!
karenmai-usace Apr 9, 2026
394adfd
Merge remote-tracking branch 'origin/main' into docs/applications-guide
karenmai-usace Apr 21, 2026
ff301f1
Reordered LifeSim pages in order of recommended reading (1) Users Gui…
karenmai-usace Apr 21, 2026
565e5bf
Cleaned border of IntroFigure
karenmai-usace Apr 21, 2026
d20f4ec
Added transparency to figure86 and figure162 for dark mode compatabil…
karenmai-usace Apr 21, 2026
68eea5f
Fixed error/failure of link paths containing uppercase (needs lowercase)
karenmai-usace Apr 21, 2026
ba3b58e
Fixing broken link (lifeSim to lifesim)
karenmai-usace Apr 22, 2026
4860ddf
Trigger preview rebuild
karenmai-usace Apr 28, 2026
6411d04
Delete static/figures/desktop-applications/lifesim/applications-guide…
karenmai-usace Apr 30, 2026
9f0b3d3
Typo fixed ("failur" to "failure")
karenmai-usace Apr 30, 2026
2b51842
Merge branch 'docs/applications-guide' of https://github.com/USACE-RM…
karenmai-usace Apr 30, 2026
File filter

Filter by extension

Filter by extension

Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
Original file line number Diff line number Diff line change
@@ -1,16 +1,16 @@
---
title: Document Info
reportDate: March 2026
reportDate: April 2026
reportType: Computer Program Document
reportTitle: LifeSim
reportSubTitle: Applications Guide
reportAuthors: ['Susie Byrd, Risk Management Center']
reportAbstract:
reportAcknowledgments: A special thank you to Jordan McMaster, Kurt Buchanan, Woodrow Fields, and Karen Mai for their contributions and support to make the LifeSim Applications Guide a reality.
reportSubjectTerms:
responsiblePersonName: xx
responsiblePersonName: Susie Byrd
responsiblePersonNumber: ###-###-####
citationGuide: "S. E. Byrd and xx, <i>LifeSim Applications Guide</i>, Davis, CA: U.S. Army Corps of Engineers, Risk Management Center, 2026. Accessed on <i>{enter current date here}</i>."
citationGuide: "S. E. Byrd et al., <i>LifeSim Applications Guide</i>, Davis, CA: U.S. Army Corps of Engineers, Risk Management Center, 2026. Accessed on <i>{enter current date here}</i>."
---

import Link from "@docusaurus/Link";
Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -16,9 +16,9 @@ import TableVersionHistory from "@site/src/components/TableVersionHistory";

<TableVersionHistory
versions={['1.0']}
dates={['March 2026']}
descriptions={["Initial release of LifeSim Applications Guide"]}
dates={['April 2026']}
descriptions={["Official release of LifeSim Applications Guide"]}
modifiedBy={['Susie Byrd']}
reviewedBy={['xx']}
approvedBy={['xx']}
reviewedBy={['Sarah Mattingly; Ariel Feldman']}
approvedBy={['Woodrow Fields']}
/>
Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,13 @@ import Link from "@docusaurus/Link";
import addBaseUrl from "@docusaurus/useBaseUrl";
import Citation from "@site/src/components/Citation";
import CitationFootnote from "@site/src/components/CitationFootnote";
import Figure from "@site/src/components/Figure";
import FigureInline from "@site/src/components/FigureInline";
import FigReference from "@site/src/components/FigureReference";
import NavContainer from "@site/src/components/NavContainer";
import ProcessList from "@site/src/components/ProcessList";
import TableReference from "@site/src/components/TableReference";
import TableVertical from "@site/src/components/TableVertical";
import VersionSelector from "@site/src/components/VersionSelector";

<NavContainer
Expand All @@ -17,9 +23,9 @@ import VersionSelector from "@site/src/components/VersionSelector";

# Preface

LifeSim is the life loss and direct damage estimation software used by the U.S. Army Corps of Engineers. LifeSim is designed to simulate the entire
warning and evacuation process for estimating potential life loss and direct economic damages resulting from floods. The following is a description of
the major capabilities of LifeSim:
<a href="https://www.rmc.usace.army.mil/Software/LifeSim/" target="_blank" rel="noopener noreferrer">LifeSim</a> is the life loss and direct damage estimation
software used by the U.S. Army Corps of Engineers. LifeSim is designed to simulate the entire warning and evacuation process for estimating potential life loss
and direct economic damages resulting from floods. The following is a description of the major capabilities of LifeSim:

- Graphical User Interface
- Agent Based Modeling
Expand All @@ -30,20 +36,21 @@ The user interacts with LifeSim through a graphical user interface (GUI). The in
maintaining a high level of efficiency for the user.

LifeSim uses an agent-based approach to track individuals throughout the warning and evacuation process. During an evacuation, agents are interacting
with the roads, other vehicles, and the incoming hazard. After the warning and evacuation process has been simulated, LifeSim calculates lethality for
those people who are exposed to the hazard and the associated direct damages. By tracking individual people and their movements, LifeSim can help
with the roads, other vehicles, and the incoming hazard (e.g., floodwaters). After the warning and evacuation process has been simulated, LifeSim calculates
lethality for those people who are exposed to the hazard and the associated direct damages. By tracking individual people and their movements, LifeSim can help
identify where people are most at risk of losing their lives, whether it is on roads or in structures.

Three modes of evacuation are included in LifeSim: cars, sports utility vehicles (SUVs), and pedestrians. For vehicular evacuation, a dual regime
modified Greenshields model (USDOT) in conjunction with spillback enforcement is used for traffic propagation to represent the effects of traffic
density and road capacity on vehicle speed. Each road is assigned default values for the number of lanes, free flow speed, traffic jam densities, and
minimum stop-and-go speeds based on the Highway Capacity Manual (HCM) (TRB 2000).
minimum stop-and-go speeds based on the Highway Capacity Manual (HCM) <Citation citationKey="HCM2000"/>.

To define the routes people use to evacuate, a road network is provided where each segment of the network contains information such as road category,
directionality, ground offset (for bridges), and interconnectivity. The road network can be imported from an existing GIS polyline shapefile or from
OpenStreetMap. OpenStreetMap is a collaborative project to create a free editable map of the world. During each timestep at the user defined interval
Δt, evacuating groups (PAR evacuating from a structure in a single vehicle) move as far as the model allows until the group reaches a destination
point, gets caught, or becomes stranded. More information on the evacuation simulation can be found in the (RMC 2021).
OpenStreetMap <Citation citationKey="OSM"/>. OpenStreetMap is a collaborative project to create a free editable map of the world. During each timestep at the user
defined interval Δt, evacuating groups (PAR evacuating from a structure in a single vehicle) move as far as the model allows until the group reaches a destination
point, gets caught, or becomes stranded. More information on the evacuation simulation can be found in the LifeSim 2.0 Technical Reference Manual
<Citation citationKey="LifeSimTech2021"/>.

LifeSim applies both natural variability and knowledge uncertainty through Monte Carlo analysis. Multiple parameters can be entered with uncertainty
including those that influence the warning and evacuation timeline. Each iteration in a simulation represents a scenario that could occur given the
Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -23,42 +23,49 @@ import VersionSelector from "@site/src/components/VersionSelector";

# Introduction

Welcome to the U.S. Army Corps of Engineers LifeSim Applications Guide. LifeSim uses an agent-based methodology for estimating life loss with the
fundamental intent to simulate population redistribution during an evacuation. Direct life loss, direct economic damages, and direct agriculture
damages are then determined by the hazard (e.g., flooding). Direct consequences, the primary focus of LifeSim, are those incurred when people,
Welcome to the LifeSim Applications Guide developed by the Risk Management Center, U.S. Army Corps of Engineers. LifeSim uses an agent-based methodology
for estimating life loss with the fundamental intent to simulate population redistribution during an evacuation. Direct life loss, direct economic damages,
and direct agriculture damages are then determined by the hazard (e.g., flooding). Direct consequences, the primary focus of LifeSim, are those incurred when people,
structures, or agricultural resources interact with the hazard.

LifeSim is designed to simulate the entire warning and evacuation process for estimating potential life loss and direct economic damages resulting from
catastrophic floods (e.g., riverine flooding, coastal flooding, dam breach, and levee breach). LifeSim applies both natural variability and knowledge
uncertainty (i.e., naturally occurring change in models’ parameters and outputs and gaps in what can be known by the modelers at the time) through
Monte Carlo simulation. Many parameters can be entered with uncertainty including those that influence the warning and evacuation timeline (see the ,
Warning and Evacuation Timeline Section for a more detailed overview). LifeSim is a multifaceted consequence estimation tool that can be utilized for various
types of studies and analyses, including dam safety, levee safety, coastal storm risk management, flood risk management, risk communication, and
more.
LifeSim is designed to simulate the entire warning and evacuation process (see <FigReference figKey="figure-0"/>) for estimating potential life loss and direct economic damages resulting from
catastrophic floods (e.g., riverine flooding, coastal flooding, dam failures, and levee failures). LifeSim applies both natural variability and knowledge
uncertainty (i.e., naturally occurring change in models’ parameters and outputs and gaps in what can be known by the modelers at the time) through
Monte Carlo simulation. Many parameters can be entered with uncertainty including those that influence the warning and evacuation timeline (see the LifeSim 2.0
Technical Reference Manual <Citation citationKey="LifeSimTech2021"/> Warning and Evacuation Timeline Section for a more detailed overview). LifeSim is
a multifaceted consequence estimation tool that can be utilized for various types of studies and analyses, including dam safety, levee safety, coastal
storm risk management, flood risk management, risk communication, and more.

<Figure
figKey="figure-0"
src="figures/desktop-applications/lifesim/applications-guide/v1.0/figures/figure0.png"
alt="Warning and evacuation timeline in LifeSim"
caption="Warning and evacuation timeline in LifeSim"
/>

## Overview of this Guide

The LifeSim Applications Guide contains written descriptions of seven examples that demonstrate the main features of the LifeSim software. The
discussions in this manual contain detailed descriptions for the data inputs and analysis of the output for each example. The examples show and
describe various input and output screens used to enter the data and view the output. The examples are intended as a guide for performing similar
analyses in LifeSim. The manual is organized as follows:
The LifeSim Applications Guide contains written descriptions of eight examples that highlight the main ways to utilize the LifeSim software, which is
focused on estimating direct life loss and direct economic damages to structures, contents, and vehicles. The examples in this manual contain detailed descriptions
for the data inputs and analysis of the output for each example. Each example describes various inputs, different features of LifeSim, and how best to view and analyze
your results. The examples are intended as a guide for performing similar analyses in LifeSim. The manual is organized as follows:

<ProcessList
items={[
{ // STEP 1
title: (
<>
<strong>Summary of LifeSim Inputs</strong>, details the required inputs for all LifeSim studies. This section also defines and explains the inputs.
Finally, some recommended data pre-processing is discussed. Reference back to this section for additional information on Hydraulic Data, emergency
planning zones, Structure Inventories, Alternatives, and Simulations.
<strong>Summary of LifeSim Inputs</strong>, defines and explains the required inputs for all LifeSim studies. Finally, some recommended
data pre-processing is discussed. Reference back to this section for additional information on Hydraulic Data, Emergency Planning Zones (EPZ),
Structure Inventories, Alternatives, and Simulations.
</>
),
},
{ // STEP 2
title: (
<>
<strong>Estimating Consequence for Levees and Floodwalls</strong>,<strong> </strong>demonstrates the data required to estimate consequences
(life loss and direct economic damages) for a levee or floodwall breach. The example details required inputs, ways to acquire emergency preparedness
<strong>Estimating Consequence for Levees and Floodwalls</strong>, demonstrates the data required to estimate consequences
(life loss and direct economic damages) for a levee or floodwall failure. The example describes the required inputs, ways to acquire emergency preparedness
information for populations at risk (PAR) and emergency management agencies (EMAs), how to simulate evacuation, and how to analyze your modeling
results.
</>
Expand All @@ -67,17 +74,17 @@ analyses in LifeSim. The manual is organized as follows:
{ // STEP 3
title: (
<>
<strong>Estimating Consequences for Dams</strong>, demonstrates the data required to estimate consequences for a dam breach model. The
<strong>Estimating Consequences for Dams</strong>, demonstrates the data required to estimate consequences for a dam failure model. The
example details potential Geospatial Information System (GIS) pre-processing needed for data inputs, editing your structure inventory for accuracy,
and inputting warning and evacuation data specific to dams.
and inputting warning and evacuation data specific to dams. It also demonstrates how to conduct a quality check review of your structure inventory.
</>
),
},
{ // STEP 4
title: (
<>
<strong>Estimating Consequences for Cascading Dam Breaches</strong>, demonstrates various ways to model cascading dam breaches. The example
highlights the modeling differences if there is a downstream dam that breaches due to an upstream dam breaching. This example primarily focuses on
<strong>Estimating Consequences for Cascading Dam Failures</strong>, demonstrates various ways to model cascading dam failures. The example
highlights the modeling differences if there is a downstream dam that fails due to an upstream dam failure. This example primarily focuses on
differences in (1) selecting the hazard occurrence time (i.e., the date and time breach or overtopping occurs in the study area) and (2) the
delineation and parameter selection of the emergency planning zones (i.e., zones in LifeSim that can uniquely sample uncertainty parameters).
</>
Expand All @@ -86,27 +93,27 @@ analyses in LifeSim. The manual is organized as follows:
{ // STEP 5
title: (
<>
<strong>Estimating Consequences for Coastal Infrastructure</strong>,<strong> </strong>illustrates how LifeSim modeling differs for coastal
structures (e.g., floodwalls, seawalls, dunes, and levees) compared to riverine infrastructure (e.g., floodwalls and levees), including differences in
hydraulic data, warning times, and other consequence nuances specific to coastal infrastructure.
<strong>Estimating Consequences for Coastal Infrastructure</strong>, illustrates how LifeSim modeling differs for coastal
structures (e.g., floodwalls, seawalls, and dunes) compared to typical riverine infrastructure (e.g., dams, floodwalls, and levees), including differences in
hydraulic data, warning times, and other considerations specific to coastal infrastructure.
</>
),
},
{ // STEP 6
title: (
<>
<strong>Estimating Life Loss in Flood Risk Management Planning</strong>, details how to compare life loss across an array of Planning
alternatives in LifeSim. This example shows how to use typical Planning hydraulic outputs (e.g., eight flow-frequency events typically used in
Hydrologic Engineering Center’s Flood Damage Reduction Analysis [ HEC-FDA]) in LifeSim to estimate expected annual life loss and how to utilize these
results in the Planning process.
alternatives in LifeSim. This example shows how to use the typical hydraulic outputs provided in a Planning study (e.g., eight flow-frequency events often
used in Hydrologic Engineering Center’s Flood Damage Reduction Analysis [HEC-FDA] <Citation citationKey="FDA"/>) in LifeSim to estimate expected annual
life loss and how to utilize these results in the Planning process.
</>
),
},
{ // STEP 7
title: (
<>
<strong>Estimating Direct Economic Damages for Flood Risk Management Planning</strong>, focuses solely on generating accurate direct
economic damages with more uncertainty than the default parameters. The chapter details how to edit and create structure occupancy types, adjust
economic damages by updating various uncertainty parameters in LifeSim. The chapter details how to edit and create structure occupancy types, adjust
stage-damage curve uncertainty, adjust foundation height uncertainty, and adjust structure value uncertainty.
</>
),
Expand All @@ -116,7 +123,7 @@ analyses in LifeSim. The manual is organized as follows:
<>
<strong>Estimating Consequences Using Summary Grids</strong>,<strong> </strong>demonstrates how to estimate life loss and economic damages
using summary grid output which differs from using Hierarchical Data Format (HDF) files from Hydrologic Engineering Center’s River Analysis System
(HEC-RAS). This example will be helpful for individuals attempting to estimate consequences for a smaller Planning study, a study that did not utilize
(HEC-RAS) <Citation citationKey="HECRAS2024"/>. This example will be helpful for individuals attempting to estimate consequences for a smaller Planning study, a study that did not utilize
unsteady flow in HEC-RAS, or a study with limited output or information from the hydraulic model.
</>
),
Expand Down
Loading
Loading