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Surface Elevation Table Data at the Nisqually River Delta, Washington

Dates

Publication Date
Start Date
2010-06-15
End Date
2022-06-10

Citation

Woo, I., De La Cruz, S.E.W., Davis, M.J., Takekawa, J.Y., Turner, K.L., Guntenspergen, G.R., Lynch, J.C., and Nakai, G., 2024, Monitoring changes in surface elevation using deep Surface Elevation Table and Marker Horizon data at the Nisqually River Delta, Washington: U.S. Geological Survey data release, https://doi.org/10.5066/P9R0HL3R.

Summary

Surface Elevation Tables (SETs) were installed in 2009 and 2010 using permanent, deep rods driven down into the soil with a demolition hammer, typically about 60-80 feet. The top of the rod lies near the sediment surface, with a receiver end. A Surface Elevation Table is a portable mechanical leveling device that attaches to the receiving end at the top of the deep rod. The SET arm includes a bubble level and a notched collar that allows for the arm to be aligned precisely and repeatedly in the cardinal directions. SETs were installed as triplicates in Reference, Phase II, and as north-south pairs in the 2009 restoration area (Units 1-4). Each SET location was read repeatedly at regular, at least annual intervals. Reading SETs consisted [...]

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Attached Files

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USGS Nisqually Delta SETs.csv 272.89 KB text/csv

Purpose

At the Nisqually River Delta, in south Puget Sound, WA, SETs were used as a way to assess changes in elevation following large scale estuarine restoration (2009 Restoration site) compared to an older restoration (2006 Restoration site) and Red Salmon Slough reference site.

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