ACTION

The risk analysis for the Weld County HMP was performed using an analytical suitability model that was created in the GIS software, Esri ArcGIS. In general, a suitability model was used to identify the most fitting areas based on specified criteria and data and was employed to answer the question of where the highest risks can be found. Criteria data was curated, prepared, and used for each hazard type of interest. The hazard types, corresponding datasets, preparation methods, and resolution were all customized based on the project requirements and need outlined by the client. To combine the various hazard-specific layers into a composite risk layer, each data layer was transformed to a common hazard format and scale. County analysis and categorical data was transformed using the Unique Categories transformation method while continuous data was transformed using the Linear option under the Continuous Functions transformation method. In addition to handling the transformations, the model also allows for control over the criteria weight before generating the composite risk scores and mapping. For this analysis, the weights were changed to reflect the potential magnitude of the population and spacial features that would be affected in the case of the corresponding hazard event. After establishing the weights, the model was used to run the calculations and output the composite risk analysis for inclusion in the hazard mitigation plan.