10.3.2. Importance in Hydrography

Try these first

1. 1.

   What is a tide correction?

   Hint

   Think about how high or low the water can be at different times.

2. 2.

   Why are tide gauges important?

   Hint

   Consider what information you need to adjust measurements.

3. 3.

   What effect do tide levels have on hydrographic surveys?

   • They do not affect measurements
   • They can change the readings of water depth
   • They only affect navigation

   Hint

   Remember how tides fluctuate the water levels.

4. 4.

   True or False: Tidal corrections are optional in hydrographic surveying.

   • True
   • False

   Hint

   Think about the importance of accurate measurements in marine navigation.

5. 5.

   You are conducting a hydrographic survey in a harbor where tidal fluctuations can be up to 3 feet. If your raw depth measurement is 15 feet, calculate the tide-corrected depth during high tide.

   Hint

   Consider the highest point the tide can reach when adjusting.

6. 6.

   Different tide gauge types present varying accuracies. Choose a type of tide gauge for a coastal region known for heavy tidal waves, and justify your choice.

   Hint

   Think about what type would function best in turbulent conditions.