The Oklahoma Dispersion Model is a tool developed to aid in decision making with respect to the near-surface release of gases and small particulates (airborne particles with diameters less than 20 microns). Examples include pesticides released by surface or aerial spraying, odors associated with land application of animal waste, and smoke generated by fire. In such practices, it is important to know both (1) the ability of the atmosphere to disperse (e.g., spread about and dilute) the material and (2) the direction the material will be transported (e.g., drift).

The model features both graphical and textual output that depict current and future conditions for atmospheric dispersion and transport direction. The focus of the model is the evaluation of dispersion conditions with respect to downwind concentrations at distances of 1/4 mile and greater. Thus, the model is a useful tool for assessing appropriate times to minimize downwind pollutant concentrations resulting from the near-surface release of gases and particulates.

All customers should read the section entitled How to Use the Oklahoma Dispersion Model, a basic guide on how to utilize the model output. For more technical information, read the Model Description section.

DISCLAIMER
As with any weather-based management model, the Oklahoma Dispersion Model is intended only as a tool in making decisions for proper timing of gaseous and particulate releases. It is not intended to replace the best judgment of the user in making those decisions.