Skepticism surrounds the accuracy of oil spill flow rate estimates derived from underwater video analysis, particularly following Prof. Steven Wereley's admission that his initial estimate was significantly low. Concerns focus on the quality of the video used for particle image velocimetry, which may not meet the method's requirements for controlled illumination and high-resolution imaging. Wereley's calculations suggest a spill rate of 70,000 barrels per day, vastly exceeding BP's official estimate of 5,000 barrels per day, which BP disputes. Other scientists have produced similar estimates using different methods, indicating a consensus that the actual spill rate is much higher than reported. The ongoing debate highlights the complexities and uncertainties in accurately measuring the environmental impact of the Gulf oil spill.
