ANALYSIS OF OIL SPILL RESPONSE PERFORMANCE USING MODELS

Abstract

ABSTRACT The utilization of oil spill models is typically associated with the development of oil spill contingency plans, the support of spill response exercises, or the simulation of trajectories and weathering in actual spill incidents. Some spill models have the capability to simulate spill response through the removal of surface oil by mechanical recovery, in-situ burning, or by the application of dispersants. These models require that the basic operating parameters of the response equipment are entered into the models. The models remove oil from the surface using those parameters within the environmental operating limits for that technology. This type of analysis can be valuable in evaluating the success of spill responses under various conditions. The simulation of oil spill response equipment in the SIMAP Model has been enhanced with the incorporation of a Spill Tools Calculator. The calculator readily incorporates various types of spill response equipment and associated operational parameters. Spill equipment is then applied to responses on a day-by-day basis using realistic travel times, storage capacities, and slick-intercept capabilities. This analysis allows for a realistic, albeit, optimistic prediction of spill response performance. A thorough understanding of the potential performance of a response early in a spill allows regulators and resource managers the opportunity to make decisions that may improve the ultimate success of the response. The SIMAP Model provides numerous estimates of spill effects, e.g. shoreline oiling area and mass, and water concentrations of aromatics and total hydrocarbons. These parameters, in conjunction with the mass balance and response performance indicators, are valuable in comparing the results from various spill response alternatives. This information provides regulators and resource managers an understanding of the implications of various response alternatives and enables the selection of response alternatives that best meet the priorities in the area.