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Metadata Report for BODC Series Reference Number 695808


Metadata Summary

Data Description

Data Category Bathymetry
Instrument Type
NameCategories
Valeport MIDAS Surveyor  single-beam echosounders; Differential Global Positioning System receivers
Instrument Mounting self-propelled small boat
Originating Country United Kingdom
Originator Dr John Bacon
Originating Organization University of East Anglia School of Environmental Sciences
Processing Status banked
Online delivery of data Download not available
Project(s) LEACOAST-2
 

Data Identifiers

Originator's Identifier S060719R
BODC Series Reference 695808
 

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 2006-07-19 00:00
End Time (yyyy-mm-dd hh:mm) 2006-07-20 23:59
Nominal Cycle Interval -
 

Spatial Co-ordinates

Southernmost Latitude 52.77467 N ( 52° 46.5' N )
Northernmost Latitude 52.81350 N ( 52° 48.8' N )
Westernmost Longitude 1.58083 E ( 1° 34.8' E )
Easternmost Longitude 1.65733 E ( 1° 39.4' E )
Positional Uncertainty 0.0 to 0.01 n.miles
Minimum Sensor or Sampling Depth -
Maximum Sensor or Sampling Depth -
Minimum Sensor or Sampling Height -
Maximum Sensor or Sampling Height -
Sea Floor Depth -
Sea Floor Depth Source -
Sensor or Sampling Distribution -
Sensor or Sampling Depth Datum -
Sea Floor Depth Datum -
 

Parameters

BODC CODERankUnitsTitle
ACYCAA011DimensionlessSequence number
EASTOSG11MillimetresEasting relative to OSGB36 by Topcon 5Hz real-time kinematic GPS
NRTHOSG11MillimetresNorthing relative to OSGB36 by Topcon 5Hz real-time kinematic GPS
ODPTHZ021MetresSea-floor depth (below ODN datum) {bathymetric depth} of the water body by echo sounder and correction to datum using GPS

Definition of Rank

  • Rank 1 is a one-dimensional parameter
  • Rank 2 is a two-dimensional parameter
  • Rank 0 is a one-dimensional parameter describing the second dimension of a two-dimensional parameter (e.g. bin depths for moored ADCP data)

Problem Reports

No Problem Report Found in the Database


Data Access Policy

Public domain data

These data have no specific confidentiality restrictions for users. However, users must acknowledge data sources as it is not ethical to publish data without proper attribution. Any publication or other output resulting from usage of the data should include an acknowledgment.

The recommended acknowledgment is

"This study uses data from the data source/organisation/programme, provided by the British Oceanographic Data Centre and funded by the funding body."


Narrative Documents

Sea Palling Nearshore Surveys - April to October 2006

BODC Processing

The data were received by BODC in ASCII format.

The data were then transferred to QXF using BODC transfer process 383. Following the transfer to QXF, the data were visualised within the in-house EDSERPLO package for quality control purposes.

BODC Parameter Code Mapping

Raw Data Variable Name Description Units Conversion Factor BODC Parameter Code Units
X Ordnance Survey eastings metres *1000 EASTOSG1 millimetres
Y Ordnance Survey northings metres *1000 NRTHOSG1 millimetres
Z Depth below Ordnance Datum Newlyn metres *-1 ODPTHZ02 metres

Data Quality

There are no reported or observed problems with these data.


Project Information

LEACOAST-2 Project

Project overview

During the floods of January 1953, Europe's worst natural disaster for over two centuries, the Norfolk coastline suffered a great deal of damage. The serious breach of the sea defences at Sea Palling warranted the largest scheme of offshore reefs in the UK to be built to protect the coast and the low-lying farm land behind it.

These shore-parallel reefs were constructed in two phases. An increased understanding of the performance of the reefs following the first phase of construction allowed the second phase to be designed to provide sufficient sea defence but control the levels of environmental impact.

Aims

The LEACOAST2 (Liverpool - East Anglia Coastal Study 2) project is a 3-year programme (2006-2009) funded by the Engineering and Physical Sciences Research Council. LEACOAST2 aims to:

  • Evaluate the effects of the breakwaters on the whole beach system over two years
  • Provide enhanced tools for improving the design guidelines for coastal defences

The research is focussed on:

  • Developing existing numerical models of the environmental processes at the breakwaters to include new factors such as waves breaking over the structures
  • Testing the sensitivities of several models of the local environment
  • Developing and testing an engineering model to predict long-term changes in beach shape
  • Extensive measurements of the waves, currents and beach shape to provide data for the models and to identify sediment transport pathways
  • Long-term monitoring of the change in coastline shape using advanced video and radar techniques
  • Improving the understanding of how the shore-parallel breakwaters at Sea Palling operate and interact with sediment sources and adjacent areas to provide better coastal management

Methods

Over months and years, the sea defences at Sea Palling interact with the adjacent beaches. To include these beaches within the LEACOAST2 programme the researchers use computer models, advanced field monitoring equipment and make measurements on the beach and just offshore at Sea Palling.

The field measurements include:

  • Rapid Global Positioning System (GPS) surveys
  • Acoustic current meters
  • 5-camera video system
  • X-band radar
  • Side-scan sonar imaging of bedforms

Data Activity or Cruise Information

Data Activity

Start Date (yyyy-mm-dd) 2005-11-15
End Date (yyyy-mm-dd) 2007-07-16
Organization Undertaking ActivityUniversity of East Anglia School of Environmental Sciences
Country of OrganizationUnited Kingdom
Originator's Data Activity IdentifierS_P_survey
Platform Categorybeach/intertidal zone structure

Sea Palling Surveys

Survey Strategy

Surveys of the beach morphology and near-shore bathymetry of Sea Palling have been made at approximately monthly intervals. The purpose of these surveys was to monitor the growth or erosion of the salients behind the sea defences and to observe the transport of sediment through the region. The surveys are conducted from a quad bike for the land based portion and a Rigid Inflatable Boat (RIB) for the bathymetric portion.

The survey patterns for the beach survey attempt to follow lines of "break-in-slope" with the assumption that the beach is of constant slope between these lines. The nearshore surveys cannot follow "breaks-in-slope" so a spiral pattern is adopted within the embayments and shore-parallel lines are surveyed seaward of the breakwaters.

Survey Instrumentation

The positioning system used is a Topcon 5Hz Real-Time Kinematic (RTK) which has been enabled to receive Global Positioning System (GPS) and Global Navigation Satellite System (GLONASS) signals. This system can receive up to 24 satellite signals at one time (known as channels), although in practice, only up to 12 channels are in use.

The RTK system allows a single reference station to provide real-time corrections to a GPS / GLONASS positional fix, allowing the accuracy of the surveys to be increased to the order of 1cm.

For the land-based survey portion the RTK positional data are logged by a Topcon FC controller at a point spacing of 1 - 3m.

For the nearshore surveys the RTK signal feeds a National Marine Electronics Association (NMEA0183) string to a Valeport MIDAS echosounder at 2Hz. The output of a MICROSTRAIN 3DGX1 motion sensor (pitch, roll and heading) are also recorded. The motion sensor outputs at 75Hz, but this is resampled to match the sampling rate of the positional data and the sounding log.

Related Data Activity activities are detailed in Appendix 1


Fixed Station Information


No Fixed Station Information held for the Series


BODC Quality Control Flags

The following single character qualifying flags may be associated with one or more individual parameters with a data cycle:

Flag Description
Blank Unqualified
< Below detection limit
> In excess of quoted value
A Taxonomic flag for affinis (aff.)
B Beginning of CTD Down/Up Cast
C Taxonomic flag for confer (cf.)
D Thermometric depth
E End of CTD Down/Up Cast
G Non-taxonomic biological characteristic uncertainty
H Extrapolated value
I Taxonomic flag for single species (sp.)
K Improbable value - unknown quality control source
L Improbable value - originator's quality control
M Improbable value - BODC quality control
N Null value
O Improbable value - user quality control
P Trace/calm
Q Indeterminate
R Replacement value
S Estimated value
T Interpolated value
U Uncalibrated
W Control value
X Excessive difference

SeaDataNet Quality Control Flags

The following single character qualifying flags may be associated with one or more individual parameters with a data cycle:

Flag Description
0 no quality control
1 good value
2 probably good value
3 probably bad value
4 bad value
5 changed value
6 value below detection
7 value in excess
8 interpolated value
9 missing value
A value phenomenon uncertain
B nominal value
Q value below limit of quantification

Appendix 1: S_P_survey

Related series for this Data Activity are presented in the table below. Further information can be found by following the appropriate links.

If you are interested in these series, please be aware we offer a multiple file download service. Should your credentials be insufficient for automatic download, the service also offers a referral to our Enquiries Officer who may be able to negotiate access.

Series IdentifierData CategoryStart date/timeStart positionCruise
686252Bathymetry2005-11-15 00:00:0052.78175 N, 1.58119 ENot applicable
686227Coastal morphology2005-11-15 00:00:0052.76257 N, 1.53445 ENot applicable
686264Bathymetry2005-12-13 00:00:0052.77678 N, 1.52724 ENot applicable
686239Coastal morphology2005-12-13 00:00:0052.76528 N, 1.55283 ENot applicable
686276Bathymetry2006-01-13 00:00:0052.77604 N, 1.57237 ENot applicable
686240Coastal morphology2006-01-13 00:00:0052.77785 N, 1.57327 ENot applicable
695869Coastal morphology2006-03-02 00:00:0052.779 N, 1.58567 ENot applicable
695870Coastal morphology2006-03-30 00:00:0052.77717 N, 1.57933 ENot applicable
695789Bathymetry2006-04-26 00:00:0052.775 N, 1.57167 ENot applicable
695882Coastal morphology2006-04-26 00:00:0052.77 N, 1.57017 ENot applicable
732869Bathymetry2006-06-28 00:00:0052.77167 N, 1.57917 EUnknown self-propelled small boat Bathymetric survey 28/06/2006
695790Bathymetry2006-07-12 00:00:0052.7815 N, 1.593 ENot applicable
695894Coastal morphology2006-07-19 00:00:0052.77717 N, 1.5765 ENot applicable
695821Bathymetry2006-08-24 00:00:0052.77967 N, 1.58333 ENot applicable
695833Bathymetry2006-08-31 00:00:0052.77467 N, 1.57983 ENot applicable
695901Coastal morphology2006-08-31 00:00:0052.76967 N, 1.58017 ENot applicable
695845Bathymetry2006-09-28 00:00:0052.7745 N, 1.58133 ENot applicable
695913Coastal morphology2006-09-28 00:00:0052.76983 N, 1.57883 ENot applicable
695857Bathymetry2006-10-20 00:00:0052.77467 N, 1.57983 ENot applicable
695925Coastal morphology2006-10-21 00:00:0052.76983 N, 1.57883 ENot applicable
732913Coastal morphology2006-11-22 00:00:0052.77567 N, 1.57933 ENot applicable
732870Bathymetry2006-11-23 00:00:0052.7755 N, 1.59283 EUnknown self-propelled small boat Bathymetric survey 22/11/2006
732882Bathymetry2006-12-18 00:00:0052.77667 N, 1.58267 EUnknown self-propelled small boat Bathymetric survey 18/12/2006
732925Coastal morphology2006-12-18 00:00:0052.774 N, 1.57917 ENot applicable
732894Bathymetry2007-01-29 00:00:0052.77817 N, 1.5935 EUnknown self-propelled small boat Bathymetric survey 30/01/2007
732937Coastal morphology2007-01-29 00:00:0052.7755 N, 1.58317 ENot applicable
732901Bathymetry2007-02-20 00:00:0052.77717 N, 1.59133 EUnknown self-propelled small boat Bathymetric survey 20/02/2007
732949Coastal morphology2007-02-20 00:00:0052.77567 N, 1.58133 ENot applicable
733191Coastal morphology2007-03-29 00:00:0052.7755 N, 1.585 ENot applicable
733209Coastal morphology2007-04-17 00:00:0052.777 N, 1.5825 ENot applicable
733210Coastal morphology2007-05-16 00:00:0052.777 N, 1.58417 ENot applicable
733222Coastal morphology2007-07-16 00:00:0052.779 N, 1.58683 ENot applicable