In Situ Underwater Average Flow Velocity Estimation Using a Low-cost Video Velocimeter

Abstract The development of a low-cost Video Velocimeter (VIV) to estimate underwater bulk flow velocity is described. instrument utilizes simplified particle image correlation technique reconstruct an average vector from video recordings ambient particles. VIV uses single camera with set mirrors that splits the view into two stereoscopic views, allowing estimation vector. was validated in controlled flume using seawater, and subsequently field tested together acoustic Doppler velocimeter both mounted close coastal seafloor. When used non-turbulent flow, can mean parallel front face root-mean-squared errors main within 10% ±20 cm/s measurement range when compared ADV. predominant feature it cost-effective method complex benthic habitats where sea floor interest.