Bathymetric mapping with an echo sounder is a widely employed technique for obtaining precise measurements of underwater terrains and creating detailed maps of the bed floor. An echo sounder, also known as a depth sounder or sonar, is an instrument that uses sound waves to determine the depth of water bodies and map the underwater landscape. We utilize RTK GPS in conjunction with the echo sounder to get realtime data of the bed floor. We analyze the data utilizing python to remove noise from the dataset ensuring smooth data transitions and quality.
During the bathymetric mapping process, an echo sounder emits sound pulses that travel through the water and reflect off the bedfloor. The device then detects the return of these sound pulses and calculates the time taken for the round trip. By factoring in the speed of sound in water, the echo sounder is able to accurately determine the water depth at the specific location where the pulse was emitted.
Bathymetric maps provide valuable information about the underwater terrain, including depth contours, slopes, and various geological features. These detailed maps are crucial for a variety of applications, such as navigation safety, coastal zone management, habitat assessment, rapid design, underwater construction, and resource exploration.