Action of inhomogeneous currents on fields of elevations and slopes of water surface nonlinear waves

The variability of surface waves parameters in a field of streamlining of a submerged driven sphere is investigated in a laboratory tank. Various frequency and amplitude surface waves were generated by a wave maker at the wall of the tank from which sphere started its motion. Surface wave were absorbed by a wave absorber at the opposite wall of the tank. The elevations of the surface were recorded by a system of ultrasonic sensors, and surface slopes were recorded by the specially created video system. The modification of the surface wave field with increase of a distance from the wave maker was investigated. The most interesting discovered effect is that with the increase of the amplitude of the generated surface wave a variability of their parameters grows in the field of the inhomogeneous current. Calculations based on the authors´ modeled integro-differential equation for the complex amplitude of surface waves show that the offered theoretical model describes the transformation of nonlinear surface waves in a field of inhomogeneous currents quite well