Modeling Tips
Posts category: modeling-tips
15
Oct 2011
Modeling Tip - October 2011
CAL3QHC and CAL3QHCR are two air dispersion models included in the CALRoads View software package. These models are used to estimate total air pollutant concentrations near highways from both moving and idling vehicles. The original design of the models accounted for carbon monoxide (CO) and particulate matter (PM), but they lacked support for other inert gases. A feature of the brand-new CALRoads View Version 5 allows users to select other pollutants for analysis.
15
Aug 2011
Modeling Tip - August 2011
Performing an air dispersion modeling analysis often results in the creation of many files on your computer. Besides input and output files, projects can contain numerous meteorological data, terrain data, digital basemaps, and external data files. Whether you are modeling a simple scenario with AERMOD or a complex regional study with CALPUFF, there will be many different file types to account for and manage.
15
Jul 2011
Modeling Tip - July 2011
One of the model updates made by the U.S. EPA earlier this year was the release of the new AERMINUTE executable. AERMINUTE processes 1-minute ASOS wind data to generate hourly wind speed and wind direction averages to supplement data within standard hourly surface data files. Meteorological stations throughout the United States have gradually replaced manned observations with Automated Surface Observing Stations (ASOS). This led to a marked increase in missing or calm hours in the hourly observations which degrades the quality of air dispersion modeling analyses. AERMINUTE provides much higher wind data quality by processing the raw 1-minute data logged by the automated station.
