| A: SET concepts and Theory: |
| B: Types of SET devices: |
|
Rod SET
(deep, shallow)
|
| C: Installation of SET: |
|
Benchmarks:
|
| Shallow RSET |
| Benchmark Tools |
| Marker Horizons |
| SET and RSET |
| Marker Horizons |
| E:SET Researchers |
| F:Publications |
Questions or Comments?
Contact:
Don Cahoon
or
James Lynch
Surface
Elevation Table (SET)
by
Donald R. Cahoon, Ph.D
and James Lynch
The Surface Elevation Table (SET) is a portable mechanical
leveling device for measuring the relative elevation of wetland sediments.
This website presents information on the purpose, design, and use of the
SET. The website is specifically designed to be a forum for researchers
in wetland science who use or might use the device and to offer more information
about the proper use of the SET and interpretation of its data. But we
encourage anyone who wants to learn more about research techniques and
their development to visit the site as well.
Precise measures of sediment elevation in wetlands are necessary to determine
rates of elevation change, particularly relative to sea level rise, and
to gain an understanding of the processes responsible for elevation change.
The SET provides a nondestructive method for making highly accurate and
precise measurements of sediment elevation of intertidal and subtidal
wetlands over long periods of time relative to a fixed subsurface datum.
This technique overcomes many of the limitations of methods currently
used to estimate elevation such as sedimentation pins, and precision surveying.
There are 2 types of SET. The original SET designed by Boumans and Day (1993) and Cahoon et al. (2002a), and the Rod SET (RSET) designed by Cahoon et al. (2002b). The Rod SET can be attached to either deep or shallow benchmarks. These different SET designs make it possible to measure elevation change within different depths of the soil profile.
|
Type of SET
|
Depth (m)
|
| Original SET |
~2 to 9
|
| Rod SET - Deep |
~2 to 25
|
| Rod SET - Shallow |
<1 to 2
|
Cape Cod, MA USA