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ArcGIS Exercise: Chemical Plume Modeling & Threat Zone Analysis


Approximately 60 minutes

Course Description:

The course "Chemical Plume Modeling & Threat Zone Analysis" is designed to give you a basic understanding of how to integrate the ALOHA chemical dispersion modeling software and ArcGIS geographic information system tools to analyze the effects of a chemical release. The exercise is based on the Homeland Security National Planning Scenario #8, “Chemical Attack – Chlorine Tank Explosion.” It is an exercise in tutorial format, with step by step instructions utilizing data for the island of O`ahu.

The exercise requires access to ArcGIS ArcView version 9.2as well as ALOHA 5.4 (provided), and ALOHA ArcMap 9.2 Footprint Import Tool (provided).. Evaluation copies of the software are available at the following URL:

This course was created by Pacific EMPRINTS, at the University of Hawaii at Manoa, Department of Anthropology. Creation of the course was funded by the U.S. Department of Health and Human Services, Office of the Assistant Secretary for Preparedness and Response, Grant No. T01HP6427-0100.


The material covered in this course is related, in part, to the following capabilities from the Homeland Security Target Capabilities List:
  1. Common: Communications
  2. Common: Planning
  3. Respond: Critical Resource Logistics & Distribution
  4. Respond: Emergency Public Information and Warning
  5. Respond: On-site Incident Management
  6. Respond: Responder Health and Safety
  7. Respond: WMD/Hazardous Materials Response and Decontamination

Learning Objectives:

By the end of this course, participants will be able to:
  1. Generate a chemical dispersion threat footprint using ALOHA software
  2. Intergrate the ALOHA output within ArcGIS as a set of GIS data layers
  3. Combine GIS query and selection operations to calculate estimates of evacuation populations
  4. Generate an evacuation zone map based on the chemical threat footprint

Target Audiences:

Administrators, Emergency/Disaster Planners, First Responders, Other Public Health personnel

Certificate of Completion:

A Certificate of Completion is available to be printed for this course upon completion of the post-test with a score of 80% or higher.

Cost: FREE*

*subject to change without notice.