Delaware Bay Upper Shelf Bottom Sediments 2008-2010
Data Set (DS) | Office for Coastal Management (OCM)GUID: gov.noaa.nmfs.inport:47983 | Updated: May 30, 2023 | Published / External
Summary
Short Citation
Office for Coastal Management, 2024: Delaware Bay Upper Shelf Bottom Sediments 2008-2010, https://www.fisheries.noaa.gov/inport/item/47983.
Full Citation Examples
The Coastal Program of Delaware's Division of Soil and Water conservation (DNREC), the University of Delaware, Partnership for the Delaware Estuary, and the New Jersey Department of Environmental Protection have partnered and are carrying out a bottom and sub-bottom imaging project to identify and map the benthic habitat and sub-bottom sediments of Delaware Bay and River. This project was initiated to better understand the distribution of bottom sediment types, habitat biodiversity, and most importantly, human's impact on the bay bottom and its living resources. The project integrates the use of three types of acoustical systems: Roxann Seabed classification system, chirp sub-bottom profiling, and multi-beam bathymetric mapping. Verification of the acoustic data with bottom and sub-bottom sediments is performed through the collection of bra banc core samples and underwater video images.
Original contact information:
Contact Name: Bartholomew Wilson
Contact Org: Delaware Coastal Program (DNREC)
Phone: 302-739-9283
Distribution Information
-
FTP download of data files.
None
Public Information.This data should be used for resource mapping and comparison purposes only. While every effort has been made to ensure that these data are accurate and reliable within limits of the state of the art, the State of Delaware and the Delaware Coastal program will not assume any liability for damages caused by any inaccuracies in these data, or failure in their use.
Controlled Theme Keywords
BENTHIC, COASTAL, environment, ESTUARY
Child Items
No Child Items for this record.
Contact Information
Point of Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202
https://coast.noaa.gov
Metadata Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202
https://coast.noaa.gov
Extents
-75.6056° W,
-75.16708° E,
39.83218° N,
38.80217° S
2008 - 2010
Item Identification
Title: | Delaware Bay Upper Shelf Bottom Sediments 2008-2010 |
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Short Name: | upper_shelf-meta |
Status: | Completed |
Abstract: |
The Coastal Program of Delaware's Division of Soil and Water conservation (DNREC), the University of Delaware, Partnership for the Delaware Estuary, and the New Jersey Department of Environmental Protection have partnered and are carrying out a bottom and sub-bottom imaging project to identify and map the benthic habitat and sub-bottom sediments of Delaware Bay and River. This project was initiated to better understand the distribution of bottom sediment types, habitat biodiversity, and most importantly, human's impact on the bay bottom and its living resources. The project integrates the use of three types of acoustical systems: Roxann Seabed classification system, chirp sub-bottom profiling, and multi-beam bathymetric mapping. Verification of the acoustic data with bottom and sub-bottom sediments is performed through the collection of bra banc core samples and underwater video images. Original contact information: Contact Name: Bartholomew Wilson Contact Org: Delaware Coastal Program (DNREC) Phone: 302-739-9283 |
Purpose: |
The bottom sediment maps were constructed to aid in the identification of essential fish Habitat (EFH), identify locations of potential borrow sites for beach replenishment, identify important locations for marine protection areas, and aid in the assessment of sediment dynamic of Delaware River and Bay. |
Notes: |
10003 |
Keywords
Theme Keywords
Thesaurus | Keyword |
---|---|
Global Change Master Directory (GCMD) Science Keywords |
EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > BENTHIC
|
Global Change Master Directory (GCMD) Science Keywords |
EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > COASTAL
|
Global Change Master Directory (GCMD) Science Keywords |
EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > ESTUARY
|
ISO 19115 Topic Category |
environment
|
UNCONTROLLED | |
None | Benthic Habitat |
None | Bottom Sediments |
None | Environmental Monitoring |
Spatial Keywords
Thesaurus | Keyword |
---|---|
Global Change Master Directory (GCMD) Location Keywords |
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > DELAWARE
|
Global Change Master Directory (GCMD) Location Keywords |
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > NEW JERSEY
|
UNCONTROLLED | |
None | Delaware |
None | Delaware Bay |
None | Delaware River |
None | State of Delaware |
None | State of New Jersey |
None | USA |
Stratum Keywords
Thesaurus | Keyword |
---|---|
UNCONTROLLED | |
None | Sediment Water Interface |
None | Surface Sediment Mapping |
Physical Location
Organization: | Office for Coastal Management |
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City: | Charleston |
State/Province: | SC |
Data Set Information
Data Set Scope Code: | Data Set |
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Maintenance Frequency: | None Planned |
Distribution Liability: |
NOAA manages much of the data to users of digital geographic data. NOAA is in no way condoning or endorsing the application of this data for any given purpose. It is the sole responsibility of the user to determine whether or not the data is suitable for the intended purpose. It is also the obligation of the user to apply the data in an appropriate and conscientious manner. NOAA provides no warranty,nor accepts any liability occurring from any incomplete,incorrect, or misleading data, or from any incorrect,incomplete, or misleading use of the data. Much of the data is based on and maintained with ARC/GIS software developed by the Environmental Systems Research Institute (ESRI). In addition, much of the information presented uses conventions and terms popularized by ARC/GIS and its user community. NOAA in no way represents the interests of ESRI,nor acts as agents for them. |
Data Set Credit: | Bartholomew Wilson P.G., DNREC Delaware Coastal Program Bartholomew.Wilson@state.de.us John Madsen Ph.D., University of Delaware Geosciences Department jmadsen@udel.edu |
Support Roles
Data Steward
Date Effective From: | 2017-03-30 |
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Date Effective To: | |
Contact (Organization): | NOAA Office for Coastal Management (NOAA/OCM) |
Address: |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address: | coastal.info@noaa.gov |
Phone: | (843) 740-1202 |
URL: | https://coast.noaa.gov |
Distributor
Date Effective From: | 2017-03-30 |
---|---|
Date Effective To: | |
Contact (Organization): | NOAA Office for Coastal Management (NOAA/OCM) |
Address: |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address: | coastal.info@noaa.gov |
Phone: | (843) 740-1202 |
URL: | https://coast.noaa.gov |
Metadata Contact
Date Effective From: | 2017-03-30 |
---|---|
Date Effective To: | |
Contact (Organization): | NOAA Office for Coastal Management (NOAA/OCM) |
Address: |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address: | coastal.info@noaa.gov |
Phone: | (843) 740-1202 |
URL: | https://coast.noaa.gov |
Point of Contact
Date Effective From: | 2017-03-30 |
---|---|
Date Effective To: | |
Contact (Organization): | NOAA Office for Coastal Management (NOAA/OCM) |
Address: |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address: | coastal.info@noaa.gov |
Phone: | (843) 740-1202 |
URL: | https://coast.noaa.gov |
Extents
Currentness Reference: | Ground Condition |
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Extent Group 1
Extent Group 1 / Geographic Area 1
W° Bound: | -75.6056 | |
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E° Bound: | -75.16708 | |
N° Bound: | 39.83218 | |
S° Bound: | 38.80217 |
Extent Group 1 / Time Frame 1
Time Frame Type: | Range |
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Start: | 2008 |
End: | 2010 |
Spatial Information
Spatial Representation
Representations Used
Grid: | Yes |
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Grid Representation 1
Dimension Count: | 2 | ||||
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Cell Geometry: | Area | ||||
Transformation Parameters Available?: | No | ||||
Axis Dimension 1 |
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Axis Dimension 2 |
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Access Information
Security Class: | Unclassified |
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Security Classification System: |
Public Data |
Security Handling Description: |
No special security handling procedures needed. |
Data Access Constraints: |
None |
Data Use Constraints: |
Public Information.This data should be used for resource mapping and comparison purposes only. While every effort has been made to ensure that these data are accurate and reliable within limits of the state of the art, the State of Delaware and the Delaware Coastal program will not assume any liability for damages caused by any inaccuracies in these data, or failure in their use. |
Distribution Information
Distribution 1
Download URL: | ftp://ftp.coast.noaa.gov/pub/benthic/Benthic_Cover_Data/DE_DelawareBay.zip |
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Distributor: | |
File Name: | Bulk Download |
Description: |
FTP download of data files. |
URLs
URL 1
URL: | https://coast.noaa.gov/ |
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Name: | NOAA's Office for Coastal Management (OCM) website |
URL Type: |
Online Resource
|
Description: |
Information on the NOAA Office for Coastal Management (OCM) |
Activity Log
Activity Log 1
Activity Date/Time: | 2017-03-30 |
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Description: |
Date that the source FGDC record was last modified. |
Activity Log 2
Activity Date/Time: | 2017-11-14 |
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Description: |
Converted from FGDC Content Standards for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details. |
Activity Log 3
Activity Date/Time: | 2018-04-11 |
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Description: |
Partial upload to move data access FTP links to Distribution Info and remove broken URLs. |
Technical Environment
Description: |
Microsoft Windows Server 2008 R2 Version 6.1 (Build 7600) ; ESRI ArcGIS 10.0.0.2414 |
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Data Quality
Accuracy: |
Ground truth information was collected at the time of the orignial surveys to calibrate the mapping and ensure the accuracy of the bottom sediment classification. |
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Completeness Report: |
All the information captured during the initial surveys and analysis are retained in this data set. |
Conceptual Consistency: |
Ground truth information was collected at the time of the orignial surveys to calibrate the mapping and ensure the accuracy of the bottom sediment classification. |
Lineage
Sources
Bottom Sediment Classification-Delaware River and Upper Bay
Contact Name: | Delaware Coastal Program (DNREC) |
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Extent Type: | Range |
Extent Start Date/Time: | 2005 |
Extent End Date/Time: | 2007 |
Source Contribution: |
RoxAnn Single-Beam surveys provided the native information for this modeled raster. | Source Geospatial Form: raster digital data | Type of Source Media: CD-ROM |
Process Steps
Process Step 1
Description: |
Data was collected in a gridded trackline configuration, with tracklines spacing of 100 meters parallel to the shoreline and 200 meters perpendicular to the shoreline. This project is an extension of the work currently being performed in Delaware waters by DNREC's Delaware Coastal Program's Delaware Bay Benthic Mapping Project. The bottom sediment point data, which has been classified according to the existing benthic mapping Roxann box plot, are converted from a number that categorizes the point according to its corresponding box (in the Roxann) into a number which reflects the sediment properties of each box in relation to one another. A ranking scale is used to allow a statistical griding scheme to interpolate between sediment data points, while minimizing erroneous sediment classifications and allowing gradational sediment deposits to be grided. A ranking scale from 0 to 28 was used for this project, with 0 representing the finest grained classifications (fluidized clay) and 28 representing the coarsest grained classifications (dense shell material). Table 1 illustrates the distribution of sediment classifications along the ranking scale, which takes into account the relation of sediment types and grain sizes to one another using both the Wentworth Scale and Shepard's classification system. Finer grains are more similar in their deposition environments, such as clay and silts, because they reflect similar current regimes, sorting, and reworking patterns (Poppe et al., 2003). While coarse sediments are much more dissimilar to finer grains, with respect to current velocities, sorting, and winnowing, the finer grains are much more closely related in their sediment diameters that the coarser grains as you increase in Phi size and/or diameter. These account for the close clustering of coarse grained deposit descriptions at the upper end of the ranking scale, while the finer grained sediments show a gradation as you increase in the rating scale. |
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Process Step 2
Description: |
The bottom sediment data is grided in Surfer 8, a surface and terrain modeling program, using block kriging and a nugget effect. This statistical griding technique estimates the average value of a variable within a prescribed local area (Isaaks and Srivastava, 1989). Block kriging utilizes the existing point data values, weights the values of the data depending upon the proximity to the point being estimated, to discretize the local area into an array of estimated data value points and then averaging those individual point estimates together to get an average estimated value over the area of interest (Isaaks and Srivastava, 1989). A variogram is constructed for the data, and the resultant spatial model that is developed from the variogram is used in the block kriging surface model to more accurately interpolate the sediment data. The fitted model was a nugget effect (with an error variance of 21.8%) and a linear model (with a slope of 0.00286 and an anisotropy of 1, which represents a complete lack of spatial correlation).The accuracy of the estimation is dependent upon the grid size of the area of interpolation, the size of each cell within the grid, and the number of discretized data points that are necessary to estimate the cells within that grid spacing. The grid size that was used to interpolate the bottom sediment maps was 591 lines x 421 lines, with a cell size of 50.8 m2. The nugget effect is added to allow the griding to assume there is very little, if any, lateral correlation or trends within the bottom sediment (Isaaks and Srivastava, 1989). The nugget effect model entails a complete lack of spatial correlation; the point data values at any particular location bear no similarity even to adjacent data values (Isaaks and Srivastava, 1989). Without the nugget effect the griding would assume that you could only have a linear progression of sediment types and would insert all the sediment types along the scale between two sediment types (i.e. silty fine to medium sands and fine to medium sand with varing amounts of pebbles would be inserted between fine sand and coarse sand even though that is not what is occurring along the bottom. The sediment data is grided with no drift for the data interpolation, also helping to minimize erroneous classifications. Sediment Classification Ranking Sediment Description 0-11-2 Clay, 2-33-44-55-66-7 Silt, 7-88-9 Sandy Silts, 9-1010-11 Fine Sand, 11-1212-13 Silty Fine to Medium Sands, 13-14 Silty Medium Sand, 14-1515-16 Fine to Medium Sand,16-1717-18 Fine to Medium Sand with abundant shell material and/or pebbles, 18-1919-20 Coarse Sand with varying amounts of pebbles, 20-2121-2222-23 Moderate Shell Material/Sandy Pebbles, 23-2424-2525-26 Abundant Shell Material/Gravel, 26-2727-28 Dense Oyster Shell. |
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Catalog Details
Catalog Item ID: | 47983 |
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GUID: | gov.noaa.nmfs.inport:47983 |
Metadata Record Created By: | Anne Ball |
Metadata Record Created: | 2017-11-14 12:58+0000 |
Metadata Record Last Modified By: | SysAdmin InPortAdmin |
Metadata Record Last Modified: | 2023-05-30 18:09+0000 |
Metadata Record Published: | 2018-04-11 |
Owner Org: | OCM |
Metadata Publication Status: | Published Externally |
Do Not Publish?: | N |
Metadata Last Review Date: | 2018-04-11 |
Metadata Review Frequency: | 1 Year |
Metadata Next Review Date: | 2019-04-11 |