A CIESE Realtime Data Project

Student Activities


Tide Types

Can you determine a diurnal, semi diurnal or mixed tide?

Procedure

1. Use the real time data available from the following tide monitoring stations. On the Student Worksheet, record the hourly reading for water height for the past 24 hours and determine if that location experiences diurnal, semi diurnal or mixed tides:

Rollover Pass, TX
Cape May, NJ

Note: Scroll to the bottom of the data page to find a definition for each data column

2. Based on the data collected, can you predict at what time the next high and low tide will occur for each location?

3. What was the predicted water height for the same time period? Record the information on the Student Worksheet.

Rollover Pass, TX
Cape May, NJ

Note: Scroll to the bottom of the data page to find a definition for each data column

4. Using a different color, plot the predicted water height for the past 24 hours on the same graph. Use your graph to answer the following questions.

5. Were there any differences between the predicted and actual water heights? Explain.

6. From the data you have collected, can you determine if tomorrow's predictions will hold true? Explain.

7. Why would it be important to know this information? Can you think of any vocations for which this information may be vital? Explain why.

8. What could some possible causes of the differences between predicted and observed height? List and explain.