& Sediment Distributions Lab
SO461 Lab, Fall 2008
This lab will be done in groups of no more than 3.
You should run the option in MICRODEM to download data (File, Tools, Download
Data sets) and get:
- We have two sediment databases, one from the USGS
East Coast Sediment Data Base, and one from the Maryland
Geological Survey for the Chesapeake Bay. The two
have different formats. The help file for MICRODEM has a
tutorial on how to analyze this data. Insure that
you understand the Shephard ternary diagram.
- You have two digital elevation models that can help with the
interpretation: the predicted bathymetry for the big picture, and Ches Bay
Bathymetery that you downloaded above.
- Requirements. Write a paragraph that answers this
question, and support your answer with maps:
- Where is there appreciable gravel, both in the
Chesapeake Bay and offshore on the East Coast (you can define
appreciable as 10% or 25%)?
- Where is there sand, both in the Chesapeake Bay
- Where are the fines (silt and clay) located, both in the
Chesapeake Bay and offshore?
- How do sediment distribution patterns vary in the
Chesapeake Bay and offshore, and what appears to
control this? For the bay consider both changes along the
length of the bay, and across the bay.