Abstract: Apparatus for studying the variations in hydrodynamic pressure for correlation with fish movement towards and away from zones of danger comprises a hollow winged section having mounted on the surface thereof, piezoelectric sensors, and an accelerometer mounted within the apparatus, for generating electrical signals that are processed and interpreted by remote electronic means.

Abstract: A method for determining the probable response of aquatic species to selected components of water flow fields, comprising the steps of obtaining data for identifying travel and quantitatively describing behavior of real fish constituting members of a selected aquatic species in a flow field, determining passive transport trajectories of the members of the aquatic species in the flow field to establish a basis from which to determine swim path selections, developing postulated behavioral responses of members of the aquatic species to at least one of hydraulic and acoustic stimuli, using statistical rules, and developing a computer utilizing the travel behavior data, the passive transport trajectories, and the postulated behavioral responses, to provide a virtual fish.

Abstract: A computer implemented method for analyzing data utilizes a program and computer for processing input data in the form of a digitized map representing a physical structure. The microprocessor performs the steps and stores the results of the steps in an attached storage device. The computer is programed to employ or use various linear scales to establish critical dimensions of the curve and to analyze the dimensions in terms of orthogonal components. These are also stored for later processing or analysis to predict physical behavior associated with the structure. In a particular embodiment the curve represents a river bottom and predictions may be made about flows and the like.