Disturbance

Information associated with disturbance in ecology research

PIE LTER extensometer measurements of marsh bank sediment deformation, soil creep in West Creek, Rowley, MA.

Abstract: 

Muddy banks of marsh channels experience soil creep – a viscous-like slow deformation resulting in a net downslope transport. Here we present the first field evidence of soil creep in a mesotidal salt marsh using
high precision measurements of soil deformation taken with a vibrating-wire extensometer over two years.

Core Areas: 

Data set ID: 

528

Keywords: 

Short name: 

MAR-WE-BankCreekExtensometer

Data sources: 

MAR-WE-BankCreekExtensometer_csv
MAR-WE-BankCreekExtensometer_xls

Methods: 

There are 5 plates and 4 segments. The instrument measures the distance between plates along each segment every hour and the temperature of each segment. Each segment is 1 m long at the beginning of the deployment. Sensor 1 is at the bottom of the marsh bank, sensor 4 is at the top of the marsh bank. The position of plate 1 of the extensometer is 42.737745°N and 70.848909°. The position of plate 5 of the extensometer is 42.737718° N and 70.848908°W.

Length change is zero at the beginning. Negative is a contraction, positive is an expansion.  

see full methods description in:
Mariotti, G., Kearney, W. and Fagherazzi, S., 2019. Soil creep in a mesotidal salt marsh channel bank: Fast, seasonal, and water table mediated. Geomorphology 33 126-137 https://doi.org/10.1016/j.geomorph.2019.03.001

Maintenance: 

On going collections

Version 01: August 16, 2019, data and metadata updates to comply with importation to DEIMS7 and LTER Data Portal. Used MarcrosExportEML_HTML (working)pie_excel2007_Jun2019.xlsm 6/7/19 12:58 PM for QA/QC to EML 2.1.0

 

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