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Turbidity of a Salt Marsh within the Chesapeake Bay, VA, USA, 2016-2017

General Information
Data Package:
Local Identifier:edi.442.1
Title:Turbidity of a Salt Marsh within the Chesapeake Bay, VA, USA, 2016-2017
Alternate Identifier:DOI PLACE HOLDER
Abstract:

We measured turbidity along a transect from channel to marsh interior from December 2015 to January 2017 at a salt mash at the mouth of the York River in the Chesapeake Bay, VA, USA. We measured turbidity (NTU) with three optical back scatter sensors (YSI EXO) to in a shore normal transect, with one in the channel and two on the marsh surface at 1m from the marsh edge and 12m from the marsh edge, respectively. The sensors measured every 15 minutes and were equipped with automatic wipers to reduce biofouling. Following retrieval, the turbidity time series data was filtered to remove any erroneous points and times when the sensors were fouled or exposed (Coleman et al. 2020). Turbidity was then calibrated to suspended sediment concentration with local sediment resulting in the calibration equation SSC (mg/L) =1.667*Sensor Turbidity (NTU)

Publication Date:2021-09-02

Time Period
Begin:
2015-12-18
End:
2017-01-27

People and Organizations
Contact:Coleman, Daniel J  [  email ]
Creator:Coleman, Daniel J (Virginia Institute of Marine Science)
Creator:Kirwan, Matthew L (Virginia Institute of Marine Science)
Associate:Kirwan, Matthew L (Virginia Institute of Marine Science, PI)

Data Entities
Data Table Name:
gw_matrix
Description:
Turbidity data for salt marsh 2015-2017, at Goodwin Island, VA
Detailed Metadata

Data Entities

Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/edi/442/1/8454482589f93196dc2653892c0ecbed
Name:gw_matrix
Description:Turbidity data for salt marsh 2015-2017, at Goodwin Island, VA
Number of Records:38921
Number of Columns:4

Table Structure
Object Name:gw_matrix.csv
Size:2161394 byte
Authentication:77a921391b170337201680d5b52d66e9 Calculated By MD5
Text Format:
Number of Header Lines:1
Record Delimiter:\r\n
Orientation:column
Simple Delimited:
Field Delimiter:,
Quote Character:"

Table Column Descriptions
 gw_datetimegw_1gw_2gw_3
Column Name:gw_datetime  
gw_1  
gw_2  
gw_3  
Definition:Date and Time of sampleTurbidity of the sensor located within the Tidal ChannelTurbidity of the sensor located at the marsh edgeTurbidity of the sensor located at the marsh interior
Storage Type:dateTime  
float  
float  
float  
Measurement Type:dateTimeratioratioratio
Measurement Values Domain:
FormatDD-MMM-YYYY hh:mm:ss
Precision
UnitNTU
Typereal
UnitNTU
Typereal
UnitNTU
Typereal
Missing Value Code:  
CodeNaN
ExplSensor was fouled, blocked, or not submerged
CodeNaN
ExplSensor was fouled, blocked, or not submerged
CodeNaN
ExplSensor was fouled, blocked, or not submerged
Accuracy Report:        
Accuracy Assessment:        
Coverage:        
Methods:        

Data Package Usage Rights

This data package is released to the "public domain" under Creative Commons CC0 1.0 "No Rights Reserved" (see: https://creativecommons.org/publicdomain/zero/1.0/). It is considered professional etiquette to provide attribution of the original work if this data package is shared in whole or by individual components. A generic citation is provided for this data package on the website https://portal.edirepository.org (herein "website") in the summary metadata page. Communication (and collaboration) with the creators of this data package is recommended to prevent duplicate research or publication. This data package (and its components) is made available "as is" and with no warranty of accuracy or fitness for use. The creators of this data package and the website shall not be liable for any damages resulting from misinterpretation or misuse of the data package or its components. Periodic updates of this data package may be available from the website. Thank you.

Keywords

By Thesaurus:
LTER Controlled Vocabularyturbidity, salt marshes, geomorphology, wetlands, suspended solids

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

Methods and protocols used in the collection of this data package
Description:

We measured turbidity along a transect from channel to marsh interior from December 2015 to January 2017. We measured turbidity (NTU) with optical back scatter sensors (YSI EXO) to quantify sediment transport from the channel across the marsh. The transect consisted of three turbidity sensors in a shore normal transect, with one in the channel and two on the marsh surface, located 1m from the edge and 12m from the edge, respectively. The sensors measured every 15 minutes and were equipped with automatic wipers to reduce biofouling. Sensors were cleaned and maintained and the data downloaded on approximately bimonthly site visits.

Suspect data points were removed from the time series record following Ganju et al., 2005. We used a recursive filter to remove points which were greater than 10 nephelometric turbidity units (NTU) higher than adjacent time steps. The record was visually analyzed to ensure points being removed represented values anomalously higher than surrounding values. These removed data points represent times when a sensor was obstructed, fouled, or not submerged.

Turbidity data was converted to suspended sediment concentration (SSC) via a combination of in situ field sampling and laboratory calibrations using sediment collected from the site. In the field, we measured turbidity with an additional sensor at various locations around the site and at different tidal stages, and collected a water sample in conjunction with each reading. In the lab, we created sediment-water slurries with a range of SSC and used a turbidity sensor to measure the slurries while they were kept in constant motion to avoid sediment settling. We compared sensor turbidity measurements to total suspended solid measurements obtained via vacuum filtration of water samples from the site and lab-created water-sediment slurries. The y-intercept value was set to zero, resulting in the equation SSC (mg/L) =1.33*Sensor Turbidity (NTU)

People and Organizations

Publishers:
Organization:Environmental Data Initiative
Email Address:
info@environmentaldatainitiative.org
Web Address:
https://environmentaldatainitiative.org
Creators:
Individual: Daniel J Coleman
Organization:Virginia Institute of Marine Science
Email Address:
dan.j.coleman@outlook.com
Id:https://orcid.org/0000-0003-4243-9153
Individual: Matthew L Kirwan
Organization:Virginia Institute of Marine Science
Email Address:
kirwan@vims.edu
Id:https://orcid.org/0000-0002-0658-3038
Contacts:
Individual: Daniel J Coleman
Email Address:
dan.j.coleman@outlook.com
Id:https://orcid.org/0000-0003-4243-9153
Associated Parties:
Individual: Matthew L Kirwan
Organization:Virginia Institute of Marine Science
Email Address:
kirwan@vims.edu
Id:https://orcid.org/0000-0002-0658-3038
Role:PI

Temporal, Geographic and Taxonomic Coverage

Temporal, Geographic and/or Taxonomic information that applies to all data in this dataset:

Time Period
Begin:
2015-12-18
End:
2017-01-27
Sampling Site: 
Description:Western Spit of Goodwin Island at the mouth of the York River in the Chesapeake Bay, VA, USA
Site Coordinates:
Longitude (degree): -76.415576Latitude (degree): 37.221481

Project

Parent Project Information:

Title:Reconciling models and measurements of marsh vulnerability to sea level rise
Personnel:
Individual: Daniel J Coleman
Email Address:
dan.j.coleman@outlook.com
Id:https://orcid.org/0000-0003-4243-9153
Role:Lead author
Individual: Mark Schuerch
Id:https://orcid.org/0000-0003-3505-3949
Role:co-author
Individual: Stijn Temmerman
Id:https://orcid.org/0000-0003-3346-9115
Role:co-author
Individual: Glenn Guntenspergen
Id:https://orcid.org/0000-0002-8593-0244
Role:co-author
Individual: Christopher Smith
Role:co-author
Individual: Matthew Kirwan
Id:https://orcid.org/0000-0002-0658-3038
Role:co-author

Maintenance

Maintenance:
Description:

Data collection has completed and the data is final

Frequency:
Other Metadata

Additional Metadata

additionalMetadata
        |___text '\n        '
        |___element 'metadata'
        |     |___text '\n            '
        |     |___element 'unitList'
        |     |     |___text '\n                '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'NTU'
        |     |     |     |  \___attribute 'name' = 'NTU'
        |     |     |     |___text '\n                    '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'Nephelometric Turbidity Unit'
        |     |     |     |___text '\n                '
        |     |     |___text '\n            '
        |     |___text '\n        '
        |___text '\n    '

Additional Metadata

additionalMetadata
        |___text '\n        '
        |___element 'metadata'
        |     |___text '\n            '
        |     |___element 'emlEditor'
        |     |        \___attribute 'app' = 'ezEML'
        |     |        \___attribute 'release' = '2021.08.25'
        |     |___text '\n        '
        |___text '\n    '

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