Water samples were collected using a van Dorn sampler, and processed for suspended-sediment concentration (SSC) and loss-on-ignition (LOI) following USGS methods (Fishman and Friedman, 1989). The two main results from the water sample analysis are the suspended-sediment concentration (SSC) in grams/liter and loss-on-ignition (LOI) expressed as the fraction of volatile solids to total solids retained on a filter(s). Water samples were stored in a refrigerated and dark location, and were filtered within one month of collection. The entire volume of each water sample was filtered to avoid sub-sampling errors. Deionized water was put through each filter as the last step of the filtration process to rinse dissolved salts from the filter. Standard laboratory protocols (Fishman and Friedman, 1989) were followed to ensure thorough drying and accurate weighing of samples. SSC results were compared to turbidity readings from deployed sensors, and were found to be highly correlated (R^2=0.93, n=97).
This data set represents a total of 117 water samples and associated analyses. A total of nine water samples collected for this project are not part of these results. Three were collected on 20150125 at the Public Landing, Maryland pier and were not included because of insufficient metadata and lack of paired turbidity sensor data. The remaining six water samples were collected on 20150712 during the final deployed instrument recovery operation; these samples were not processed within the allowed time so they were discarded.
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Horizontal position was determined using a Garmin GPSMAP 78sc handheld GPS. The expected absolute, horizontal accuracy is stated to be 3 to 5 m at the 95% confidence level using the WAAS setting. Additional sources of error in the position for the water sample locations are caused by the offset from the deployed instrument location and the exact location of the van Dorn water sampler at the time the sample was taken, which could be as large as 20 m; therefore overall expected accuracy of the reported horizontal position for these water sample locations is on the order of 25 m or better.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Total water column depth values at each sample site were determined from one of these three methods: 1) depth sounder (from boat), 2) physical measurement with calibrated pole or measuring tape, or 3) pressure data (atmospherically corrected) from deployed pressure sensor at time of sample. Sample depths were determined by markings on the lowering line for the van Dorn sampler, and the samples were typically between 0.25 and 0.75 m above the seabed. Depths given were taken from the water surface at time of sample, and were not referenced to a fixed datum. Expected accuracy of depth measurements is 0.5 m or better.
Process_Step:
Process_Description:
Deployment sample collection: Collect 31 water samples using van Dorn water sampler at deployed instrument sites in Chincoteague Bay from 20140813 - 20140816.
Process_Date: 20140816
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Steven E. Suttles
Contact_Position: Mechanical Engineer
Contact_Address:
Address_Type: mailing
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: Massachusetts
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2228
Contact_Electronic_Mail_Address: ssuttles@usgs.gov
Process_Step:
Process_Description:
Filter water samples at the USGS Woods Hole Science Center using 47mm, 1.5 micron pore size, pre-weighed, pre-volatilized 934-AH glass fiber filters. Entire sample volume is filtered, if necessary split between multiple filters if solids load is too much for a single filter. A final rinse is made using deionized water to wash out dissolved salts from each filter. Determine suspended-sediment concentration (SSC) using "Solids, residue at 105 C, suspended, gravimetric" method from Fishman and Friedman (1989). Determine loss-on-ignition (LOI) using method "Solids, volatile-on-ignition, suspended, gravimetric from Fishman and Friedman (1989). ATI Cahn C-44 micro-balance is used to weigh filters.
Process_Date: 20140819
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Thomas (Wally) Brooks
Contact_Position: Research Technician
Contact_Address:
Address_Type: mailing
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: Massachusetts
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2359
Contact_Electronic_Mail_Address: wallybrooks@usgs.gov
Process_Step:
Process_Description:
First servicing sample collection: Collect 35 water samples using van Dorn water sampler at deployed instrument sites in Chincoteague Bay from 20141014 - 20141022. This was during the first turnaround where deployed instruments were recovered, downloaded, cleaned, and batteries and anti-fouling controls refreshed as necessary. Nine of the samples were collected at the end of the first deployment (A) period and the remaining 26 after the instruments were serviced and re-deployed for the beginning of the second deployment (B).
Process_Date: 20141022
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Steven E. Suttles
Contact_Position: Mechanical Engineer
Contact_Address:
Address_Type: mailing
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: Massachusetts
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2228
Contact_Electronic_Mail_Address: ssuttles@usgs.gov
Process_Step:
Process_Description:
Filter water samples, collected between 20141014 - 20141022 using 47mm, 1.5 micron pore size, pre-weighed, pre-volatilized 934-AH glass fiber filters, at the USGS Woods Hole Science Center. Entire sample volume is filtered, if necessary split between multiple filters if solids load is too much for a single filter. A final rinse is made using deionized water to wash out dissolved salts from each filter. Determine suspended-sediment concentration (SSC) using "Solids, residue at 105 C, suspended, gravimetric" method from Fishman and Friedman (1989). Determine loss-on-ignition (LOI) using method "Solids, volatile-on-ignition, suspended, gravimetric from Fishman and Friedman (1989). ATI Cahn C-44 micro-balance is used to weigh filters.
Process_Date: 20141028
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Thomas (Wally) Brooks
Contact_Position: Research Technician
Contact_Address:
Address_Type: mailing
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: Massachusetts
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2359
Contact_Electronic_Mail_Address: wallybrooks@usgs.gov
Process_Step:
Process_Description:
Second servicing sample collection: Collect 31 water samples using van Dorn water sampler at deployed instrument sites and pier site in Chincoteague Bay from 20150118 - 20150125. This was during the second turnaround where deployed instruments were recovered, downloaded, cleaned, and batteries and anti-fouling controls refreshed as necessary. Nine of the samples were collected at the end of the second deployment (B) period and 19 after the instruments were serviced and re-deployed for the beginning of the third deployment (C). An additional 3 samples were collected at the public pier at Public Landing, MD on 20150125. A Wet Labs ECO-NTUSB turbidity sensor was deployed with the van Dorn water sampler for the 3 samples at the Public Landing pier, but the turbidity sensor did not collect valid data during the sampling (note: results of these 3 samples are not reported).
Process_Date: 20150125
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Steven E. Suttles
Contact_Position: Mechanical Engineer
Contact_Address:
Address_Type: mailing
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: Massachusetts
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2228
Contact_Electronic_Mail_Address: ssuttles@usgs.gov
Process_Step:
Process_Description:
Filter water samples collected between 20150118 – 20150125 using 47mm, 1.5 micron pore size, pre-weighed, pre-volatilized 934-AH glass fiber filters, at the USGS Woods Hole Science Center. Entire sample volume is filtered, if necessary split between multiple filters if solids load is too much for a single filter. A final rinse is made using deionized water to wash out dissolved salts from each filter. Determine suspended-sediment concentration (SSC) using "Solids, residue at 105 C, suspended, gravimetric" method from Fishman and Friedman (1989). Determine loss-on-ignition (LOI) using method "Solids, volatile-on-ignition, suspended, gravimetric from Fishman and Friedman (1989). ATI Cahn C-44 micro-balance is used to weigh filters.
Process_Date: 20150206
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Thomas (Wally) Brooks
Contact_Position: Research Technician
Contact_Address:
Address_Type: mailing
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: Massachusetts
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2359
Contact_Electronic_Mail_Address: wallybrooks@usgs.gov
Process_Step:
Process_Description:
Third servicing sample collection: Collect 23 water samples using van Dorn water sampler at deployed instrument sites and pier/dock site in Chincoteague Bay from 20150420 - 20150428. This was during the third turnaround where deployed instruments were recovered, downloaded, cleaned, and batteries and anti-fouling controls refreshed as necessary. Seven of the samples were collected at the end of the third deployment (C) period and 12 after the instruments were serviced and re-deployed for the beginning of the fourth deployment (D). An additional 4 samples were collected at a pier/dock of rental house in Greenbackville, VA on 20150420. A Wet Labs ECO-NTUSB turbidity sensor was deployed with the van Dorn water sampler for the 4 pier/dock samples in effort capture some higher suspended-sediment events that are hard to capture at the deployed instrument sites located in the open waters of Chincoteague Bay.
Process_Date: 20150428
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Steven E. Suttles
Contact_Position: Mechanical Engineer
Contact_Address:
Address_Type: mailing
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: Massachusetts
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2228
Contact_Electronic_Mail_Address: ssuttles@usgs.gov
Process_Step:
Process_Description:
Filter water samples collected between 20150420 – 20150428 using 47mm, 1.5 micron pore size, pre-weighed, pre-volatilized 934-AH glass fiber filters, onsite at the rental house in Greenbackville, VA. Entire sample volume is filtered, if necessary split between multiple filters if the solids load is too much for a single filter. A final rinse is made using deionized water to wash out dissolved salts from each filter.
Process_Date: 20150428
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Sandra Brosnahan
Contact_Position: Physical Scientist
Contact_Address:
Address_Type: mailing
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: Massachusetts
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2359
Contact_Electronic_Mail_Address: sbrosnahan@usgs.gov
Process_Step:
Process_Description:
Determine suspended-sediment concentration (SSC) using "Solids, residue at 105 C, suspended, gravimetric" method from Fishman and Friedman (1989). Determine loss-on-ignition (LOI) using method "Solids, volatile-on-ignition, suspended, gravimetric from Fishman and Friedman (1989). Laboratory analyses conducted at University of Maryland Center for Environmental Science, Horn Point Laboratory using a Mettler Toledo AT250 balance to weigh filters.
Process_Date: 20150615
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
University of Maryland Center for Environmental Science, Horn Point Laboratory (UMCES-HPL)
Contact_Person: Erika Kiss
Contact_Position: Faculty Research Assistant/Analytical Lab Manager
Contact_Address:
Address_Type: mailing
Address: P.O. Box 775
City: Cambridge
State_or_Province: Maryland
Postal_Code: 21613
Country: USA
Contact_Voice_Telephone: 410-221-8317
Contact_Electronic_Mail_Address: ekiss@umces.edu
Process_Step:
Process_Description:
Recovery sample collection: Collect 6 water samples using van Dorn water sampler at deployed instrument sites prior to final instrument recovery. Note: these samples were ultimately discarded because too much time had passed before the opportunity to filter them (> 1 month); therefore these samples are not in the dataset.
Process_Date: 20150712
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Steven E. Suttles
Contact_Position: Mechanical Engineer
Contact_Address:
Address_Type: mailing
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: Massachusetts
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2228
Contact_Electronic_Mail_Address: ssuttles@usgs.gov
Process_Step:
Process_Description:
Use Microsoft Excel (2013 professional) spreadsheet to compile all laboratory analysis of suspended-sediment concentration (SSC) and loss-on-ignition (LOI) from collected water samples in Chincoteague Bay Maryland and Virginia during 2014-15. Add sample locations (latitude/longitude) to the compiled tabular results spreadsheet. Export results spreadsheet to comma-separated values (csv) file format.
Process_Date: 2016
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Steven E. Suttles
Contact_Position: Mechanical Engineer
Contact_Address:
Address_Type: mailing
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: Massachusetts
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2228
Contact_Electronic_Mail_Address: ssuttles@usgs.gov
Process_Step:
Process_Description: USGS Thesaurus keywords added to the keyword section.
Process_Date: 20180720
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Process_Step:
Process_Description:
Added keywords section with USGS persistent identifier as theme keyword.
Process_Date: 20200908
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov