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An ADCP survey is a specialized hydrographic technique used to measure water current velocities at multiple depths by applying the Doppler effect to sound waves. The instrument emits acoustic pulses into the water, which bounce off suspended particles and return with frequency shifts that indicate current speed and direction. Unlike traditional flow measurement tools, ADCPs provide continuous vertical profiles, offering a detailed picture of how currents vary throughout the water column. These surveys are widely used in rivers, reservoirs, estuaries, and oceans to study hydrodynamics. Their importance lies in combining accuracy, efficiency, and versatility, making them indispensable for navigation safety, engineering design, and environmental monitoring. By capturing real-time data, ADCP surveys help scientists and engineers understand complex aquatic systems, predict sediment transport, and manage water resources effectively. As technology advances, ADCP surveys are becoming more accessible and reliable for diverse applications.