You are doing a hydrographic survey by the Sand Heads Light, off the mouth of the Fraser River in very silty green water.You lower a bar to check its reflection and calibrate your sounder.You find that the fresh river water has dropped the speed of sound to 1483 m/sec.If the bottom registers at 15 milliseconds (0.015 sec), how deep is the top of the Fraser delta? Use the equation: depth (m)= 0.5 * (1500 m/s * total 2-way travel time in sec)

Question

Quizplus · Accepted Answer

The depth is calculated using the given formula: depth = 0.5 * (speed of sound in water * total 2-way travel time). Substituting the given values: depth = 0.5 * (1483 m/s * 0.015 sec) = 11.1225 metres, which rounds to 11.12 metres.

You Are Doing a Hydrographic Survey by the Sand Heads