My class took a trip to the beach next to the NOAA Pacific Whale Sanctuary in Kihei. We split up into 3 groups to create a beach profile.There are a few different factors affecting the natural beach profile. One factor is armoring. There is a fish pond on the south end of the beach. This increases erosion, resulting in a narrowed beach. Another factor affecting the beach profile is dune destruction. The sand dunes on this beach were probably flattened to allow for residents across the street to have better ocean views. Even though the dunes are being rebuilt, the beach has already been damaged. Total healing will take a long time. The beach could also be affected by a drainage ditch perpendicular to the beach. Inland sediments are most likely transported to the shore during flodding or heavy rain.
Procedure:
1. In order to find the slope of the beach, we used a transect line, rise tool, run tool, compass, and a GPS device.
2. Run the transect line from the top of the assigned location to the water line (perpendicular).
3. Use the GPS to mark the point at the beginning and end of the transect line.
4. Use the rise and run tool to calculate the slope of the beach.
a) Place the rise tool at the beginning of the transect line with the level on the top. Position the rise tool so that the bubble in the level is centered.b) Place the run tool one meter away on the transect line. (The end of the horizontal meter stick should touch the rise tool.) Make sure the bubble on the balance indicator is centered.c) Record the height difference in centimeters.
d) Follow steps a-c for every meter until you get to the foot of the beach.
e) Record the results on the beach profiling data sheet.
5. While using the transect line as a reference, use the compass to make sure you are measuring in a constant direction.
1. In order to find the slope of the beach, we used a transect line, rise tool, run tool, compass, and a GPS device.
2. Run the transect line from the top of the assigned location to the water line (perpendicular).
3. Use the GPS to mark the point at the beginning and end of the transect line.
4. Use the rise and run tool to calculate the slope of the beach.
a) Place the rise tool at the beginning of the transect line with the level on the top. Position the rise tool so that the bubble in the level is centered.b) Place the run tool one meter away on the transect line. (The end of the horizontal meter stick should touch the rise tool.) Make sure the bubble on the balance indicator is centered.c) Record the height difference in centimeters.
d) Follow steps a-c for every meter until you get to the foot of the beach.
e) Record the results on the beach profiling data sheet.
5. While using the transect line as a reference, use the compass to make sure you are measuring in a constant direction.
This map displays the route of a guave thrown into the water to find the direction of the current.
The above picture shows one of my group members using the run tool. Another group member is using a compass.
In this picture, my group is using the rise and run tools with a compass to find the slope of the beach.
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