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1 | 1 | --- |
2 | | -title: "Preface" |
| 2 | +title: 'Preface' |
3 | 3 | --- |
4 | 4 |
|
5 | | -import Link from "@docusaurus/Link"; |
6 | | -import addBaseUrl from "@docusaurus/useBaseUrl"; |
7 | | -import Citation from "@site/src/components/Citation"; |
8 | | -import CitationFootnote from "@site/src/components/CitationFootnote"; |
9 | | -import NavContainer from "@site/src/components/NavContainer"; |
10 | | -import VersionSelector from "@site/src/components/VersionSelector"; |
11 | | - |
12 | | -<NavContainer |
13 | | - link="/desktop-applications/lifesim" |
14 | | - linkTitle="LifeSim" |
15 | | - document="desktop-applications/lifesim/applications-guide" |
16 | | -></NavContainer> |
| 5 | +import Link from '@docusaurus/Link'; |
| 6 | +import addBaseUrl from '@docusaurus/useBaseUrl'; |
| 7 | +import Citation from '@site/src/components/Citation'; |
| 8 | +import CitationFootnote from '@site/src/components/CitationFootnote'; |
| 9 | +import Figure from '@site/src/components/Figure'; |
| 10 | +import FigureInline from '@site/src/components/FigureInline'; |
| 11 | +import FigReference from '@site/src/components/FigureReference'; |
| 12 | +import NavContainer from '@site/src/components/NavContainer'; |
| 13 | +import ProcessList from '@site/src/components/ProcessList'; |
| 14 | +import TableReference from '@site/src/components/TableReference'; |
| 15 | +import TableVertical from '@site/src/components/TableVertical'; |
| 16 | +import VersionSelector from '@site/src/components/VersionSelector'; |
| 17 | + |
| 18 | +<NavContainer link="/desktop-applications/lifesim" linkTitle="LifeSim" document="desktop-applications/lifesim/applications-guide"></NavContainer> |
17 | 19 |
|
18 | 20 | # Preface |
19 | 21 |
|
20 | | -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 |
21 | | -warning and evacuation process for estimating potential life loss and direct economic damages resulting from floods. The following is a description of |
22 | | - the major capabilities of LifeSim: |
23 | | - |
24 | | -- Graphical User Interface |
25 | | -- Agent Based Modeling |
26 | | -- Uncertainty |
27 | | -- Graphics and Reporting |
28 | | - |
29 | | -The user interacts with LifeSim through a graphical user interface (GUI). The interface is designed to make it easy to use the software, while still |
30 | | -maintaining a high level of efficiency for the user. |
31 | | - |
32 | | -LifeSim uses an agent-based approach to track individuals throughout the warning and evacuation process. During an evacuation, agents are interacting |
33 | | -with the roads, other vehicles, and the incoming hazard. After the warning and evacuation process has been simulated, LifeSim calculates lethality for |
34 | | - those people who are exposed to the hazard and the associated direct damages. By tracking individual people and their movements, LifeSim can help |
35 | | -identify where people are most at risk of losing their lives, whether it is on roads or in structures. |
36 | | - |
37 | | -Three modes of evacuation are included in LifeSim: cars, sports utility vehicles (SUVs), and pedestrians. For vehicular evacuation, a dual regime |
38 | | -modified Greenshields model (USDOT) in conjunction with spillback enforcement is used for traffic propagation to represent the effects of traffic |
39 | | -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 |
40 | | -minimum stop-and-go speeds based on the Highway Capacity Manual (HCM) (TRB 2000). |
41 | | - |
42 | | -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, |
43 | | -directionality, ground offset (for bridges), and interconnectivity. The road network can be imported from an existing GIS polyline shapefile or from |
44 | | -OpenStreetMap. OpenStreetMap is a collaborative project to create a free editable map of the world. During each timestep at the user defined interval |
45 | | -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 |
46 | | -point, gets caught, or becomes stranded. More information on the evacuation simulation can be found in the (RMC 2021). |
47 | | - |
48 | | -LifeSim applies both natural variability and knowledge uncertainty through Monte Carlo analysis. Multiple parameters can be entered with uncertainty |
49 | | -including those that influence the warning and evacuation timeline. Each iteration in a simulation represents a scenario that could occur given the |
50 | | -data uncertainties in the model. The results of the analysis provide a distribution of estimated consequences from a given hazard. |
51 | | - |
52 | | -<CitationFootnote /> |
| 22 | +The idea for the LifeSim Applications Guide stemmed from the need to provide additional assistance and examples to the consequences field of practice. The User's |
| 23 | +Guide and Technical Reference Manual provide some detailed information on how to use LifeSim. The Applications Guide walks through several real-life dam projects |
| 24 | +and studies, and details how the LifeSim model was built and why. Some applications focus on using LifeSim to support dam and levee safety risk assessments; |
| 25 | +other applications walk through Flood Risk Management (FRM) and Coastal Storm Risk Management (CSRM) studies and how LifeSim was used to support plan formulation |
| 26 | +and decision-making. |
| 27 | + |
| 28 | +For additional information on LifeSim, please refer to the <Link to="/docs/desktop-applications/lifesim/users-guide/v1.0/preface">LifeSim User's Guide</Link> |
| 29 | +and <Link to="/docs/desktop-applications/lifesim/technical-reference-manual/v1.0/preface">LifeSim Technical Reference Manual</Link>. The Applications Guide is not |
| 30 | +intended to be a stand-alone document, and it is recommended that users have a basic understanding of LifeSim and/or consequence estimation before using this guide. |
| 31 | +This guide is not intended to provide a comprehensive overview of all LifeSim features and capabilities, but rather to highlight how LifeSim can be used to support |
| 32 | +various types of studies and analyses. |
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