Identification_Information: Citation: Citation_Information: Originator: John F. Bratton Originator: VeeAnn A. Cross Publication_Date: 2012 Title: MANHASSETALL_RESBELOWSED.SHP: Processed continuous resistivity profile (CRP) data below the sediment water interface from Manhasset Bay on Long Island, New York collected from May 15 to May 17, 2008 Edition: 1 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: Open-File Report Issue_Identification: 2011-1041 Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: http://pubs.usgs.gov/of/2011/1041/data/resistivity/shapefile/manhassetall_resbelowsed.zip Online_Linkage: http://pubs.usgs.gov/of/2011/1041/html/catalog.html Larger_Work_Citation: Citation_Information: Originator: V.A. Cross Originator: J.F. Bratton Originator: J. Crusius Originator: C.W. Kroeger Originator: C.W. Worley Publication_Date: 2012 Title: Continuous Resistivity Profiling Data from Northport Harbor and Manhasset Bay, Long Island, New York Series_Information: Series_Name: Open-File Report Issue_Identification: 2011-1041 Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Other_Citation_Details: CD-ROM Online_Linkage: http://pubs.usgs.gov/of/2011/1041/ Description: Abstract: An investigation of coastal groundwater systems was performed along the north shore of Long Island, New York during May 2008 to constrain nutrient delivery to Northport Harbor and Manhasset Bay by delineating locations of likely groundwater discharge. The embayments are bounded by steep moraines and are underlain by thick fine-grained sediments deposited in proglacial lakes during the last ice age. Beach sand and gravel overlie the glacial deposits along the coast. The continuous resistivity profiling (CRP) surveys that were conducted indicate the existence of low-salinity groundwater in shore-parallel bands, typically 25 to 50 meters wide, along the shorelines of both bays. Piezometer sampling and seepage meter deployments in intertidal and subtidal areas of the two bays confirmed the presence and discharge of brackish and low-salinity groundwater. The large tidal ranges (up to 3 meters), and the steep onshore topography and hydraulic gradients are important variables controlling coastal groundwater discharge in these areas. For more information on the survey involved in this project, see http://quashnet.er.usgs.gov/data/2008/08007/. Purpose: The purpose of this dataset is to release in shapefile format all the processed continuous resistivity profile data that occurs at the sediment water interface or below collected in Manhasset Bay on Long Island, New York from May 15 - May 17, 2008. Additionally, the release of these data acts as a data archive. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20080515 Ending_Date: 20080517 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -73.731508 East_Bounding_Coordinate: -73.700546 North_Bounding_Coordinate: 40.838912 South_Bounding_Coordinate: 40.796336 Keywords: Theme: Theme_Keyword_Thesaurus: General Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Coastal and Marine Geology Program Theme_Keyword: CMGP Theme_Keyword: Woods Hole Coastal and Marine Science Center Theme_Keyword: WHCMSC Theme_Keyword: Field Activity Number 2008-007-FA Theme_Keyword: Info Bank ID T-1-08-LI Theme_Keyword: navigation Theme_Keyword: bathymetry Theme_Keyword: Continuous Resistivity Profiling Theme_Keyword: CRP Theme_Keyword: R/V Terrapin Theme_Keyword: Lowrance GPS Theme_Keyword: AGI SuperSting Theme_Keyword: processed data Theme_Keyword: groundwater Theme_Keyword: submarine groundwater Theme_Keyword: point shapefile Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: location Theme_Keyword: oceans Theme_Keyword: oceans and estuaries Theme_Keyword: oceans and coastal Theme_Keyword: geoscientificInformation Place: Place_Keyword_Thesaurus: General Place_Keyword: North America Place_Keyword: North Atlantic Place_Keyword: United States Place_Keyword: New York Place_Keyword: Long Island Place_Keyword: Manhasset Bay Place_Keyword: Nassau County Place_Keyword: Long Island Sound Access_Constraints: None. Use_Constraints: The public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: VeeAnn A. Cross Contact_Organization: U.S. Geological Survey Contact_Position: Marine Geologist Contact_Address: Address_Type: mailing and physical address Address: Woods Hole Coastal and Marine Science Center Address: 384 Woods Hole Rd. 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 Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/of/2011/1041/data/resistivity/shapefile/manhassetall_resbelowsed.gif Browse_Graphic_File_Description: Thumbnail GIF image showing the location of the processed CRP data in Manhasset Bay. The coastline with piers is included for spatial reference. Browse_Graphic_File_Type: GIF Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.6.1500 Data_Quality_Information: Logical_Consistency_Report: All of the processed CRP data were handled in the same way. Completeness_Report: This shapefile represents all the CRP data collected at this location from the sediment water interface and deeper. In some cases the water depth was too great for the system - the sediment wasn't penetrated. Therefore no values exist in those locations. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The navigation system used was a Lowrance 480M with an LGC-2000 Global Positioning System (GPS) antenna. The antenna was located at the anchor point for the resistivity streamer, which is also directly above the fathometer transducer mount point. The GPS system is published to be accurate to within 10 meters. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: All bathymetry values were collected by the 200 kHz Lowrance fathometer. The fathometer was mounted starboard side aft, directly below the GPS antenna and the resistivity streamer tow point. The transducer was approximately 0.30 meters below the sea surface, and this draft was not corrected for. The Lowrance manufacturer indicates the speed of sound used by the system to convert to depths is 4800 feet/second (1463 meters/second). All values are assumed to be accurate to within 1 meter. Lineage: Source_Information: Source_Contribution: The continuous resistivity profile (CRP) system used on this cruise was an AGI SuperSting marine system described at the website: www.agiusa.com/marinesystem.shtml. Two different streamers were used for data collection - not simultaneously. One streamer was a 50-m streamer with an 11 electrode array with electrodes spaced 5 meters apart. The other streamer was a 15-m streamer with an 11 electrode array with electrodes spaced 1.5 meters apart. In both cases, the source electrodes are graphite, while the receiver electrodes are stainless steel. A dipole-dipole configuration was used for the data collection in which two fixed current electrodes are assigned with the measurement of voltage potential between electrode pairs in the remaining electrodes. The maximum depth below the water surface the streamer can reach is approximately ¼ the streamer length. So for the 50-m streamer, maximum depth is about 12.5 meters, while the 15 meter streamer can reach about 3.75 meters. Each line of data acquisition records several files. The two files necessary for processing are the *.stg and the *.gps file. The STG file contains the resistivity data, while the GPS file contains the navigation information. The navigation system used in concert with the CRP system is a Lowrance LMS-480M with an LGC-2000 GPS antenna and a 200 kHz fathometer transducer. The transducer also contains a temperature sensor. Lowrance indicates the speed of sound used by the system is 4800 feet/second. Both the temperature and depth information are recorded in the logged GPS file. The CRP system images the subsurface electrical properties of an estuarine, riverine or lacustrine environment. Resistivity differences can be attributed to subsurface geology (conductive vs less conductive layers) and hydrogeologic conditions with fresh water exhibiting high resistivity and saline conditions showing low resistivity. Process_Step: Process_Description: A MATLAB script (justbelowsed.m) was run on the processed CRP files to generate files with just the resistivity values that fall below the sediment water interface, and an extrapolated value at the sediment water interface. Two files from the processed resistivity data are needed for this script: the XYZ output from the EarthImager processing which has distance along line (meters), depth of resistivity reading (meters), and resistivity value (ohm-m); and the DEP file that contains distance along line (meters) and water depth values (meters). Because some lines are short and don't require a "roll-along" processing technique, the XYZ information is contained in a file with the DAT extension. The MATLAB script combines the two data files (processed resistivity and depth files) such that the output is only the resistivity values that fall at or below the sediment water interface. This script was written by the USGS (VeeAnn A. Cross) in Woods Hole, MA. In order to have a resistivity value at the sediment water interface, the software usually has to interpolate resistivity values. The version of MATLAB used for these data was MATLAB 7.5.0.342 (R2007b). An example of the script usage in MATLAB is: justbelowsed('L10F1_lin_AllInvRes.xyz','L10F1_lin_wres.dep') The output is: L10F1_lin_AllInvRes_jbsed.xyz This resulting XYZ file has 5 columns of information: distance along line (meters); depth below water surface (meters); depth below sediment/water interface (meters); resistivity value (ohm-m); log(10) resistivity value. This process step and all subsequent process steps were performed by the same person - VeeAnn A. Cross. Source_Used_Citation_Abbreviation: *.xyz or *.dat Source_Used_Citation_Abbreviation: *.dep Process_Date: 200809 Source_Produced_Citation_Abbreviation: *_jbsed.xyz Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: VeeAnn A. Cross Contact_Organization: U.S. Geological Survey Contact_Position: Marine Geologist Contact_Address: Address_Type: mailing and physical address Address: Woods Hole Coastal and Marine Science Center Address: 384 Woods Hole Rd. 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: Using ArcView 3.3 and the avenue script resist_jbsed_nan.ave (script written by VeeAnn Cross at the USGS in Woods Hole, MA) these XYZ files are converted to shapefiles. This script requires that the navigation for the resistivity line be a polyline shapefile and present in the view. The script prompts the user for the polyline shapefile in the view that they want to use, then prompts the user to browse for the xyz resistivity file. The script then creates a new point shapefile, with a point along the polyline at each value of X specified in the xyz file. The y and z values, as well as longitude and latitude are added to the point shapefile. This requires that the view be projected, as the distance in the xyz file is in meters. This script will work on a single line polyline shapefile (ie the nav for a survey line is alone in a shapefile) or on a selected line within a polyline shapefile. The result is a point shapefile with 11 columns of information. The Id attribute is automatically generated upon creation of a shapefile, the line attribute is the line name as indicated within the polyline shapefile that the program prompts the user for, dist is the distance along line attribute carried over from the MATLAB file, the attributes of location information (latitude, longitude, utmx, utmy) are calculated by the tool, the attributes depth, dep_b_sed, resvalue, and reslogval are carried over from the MATLAB file. The Entity and Attribute section further describes these attributes and their units. This particular script had to handle NaN values generated by MATLAB where the CRP data only contained information in the water column because the water was too deep for the resistivity streamer to penetrate the sediment water interface. Process_Date: 200809 Process_Step: Process_Description: Then using the geoprocessing extension that comes with ArcView 3.3, the individual point shapefiles for each line of collection were merged into a single point shapefile for each day of collection. Source_Used_Citation_Abbreviation: individual point shapefiles for each line of data collection. Process_Date: 200809 Source_Produced_Citation_Abbreviation: day4all_resbelowsed.shp Source_Produced_Citation_Abbreviation: day5all_resbelowsed.shp Source_Produced_Citation_Abbreviation: day6all_resbelowsed.shp Process_Step: Process_Description: Using ArcMap 9.2 - ArcToolbox - Data Management Tools - Projections and Transformations - Define Projection define the projection of the point shapefiles as Geographic, WGS84. Source_Used_Citation_Abbreviation: day4all_resbelowsed.shp Source_Used_Citation_Abbreviation: day5all_resbelowsed.shp Source_Used_Citation_Abbreviation: day6all_resbelowsed.shp Process_Date: 200809 Source_Produced_Citation_Abbreviation: day4all_resbelowsed.shp Source_Produced_Citation_Abbreviation: day5all_resbelowsed.shp Source_Produced_Citation_Abbreviation: day6all_resbelowsed.shp Process_Step: Process_Description: Combine the individual days of the resbelowsed files into a single shapefile. Within ArcMap 9.2, using ArcToolbox - Data Management Tools - General - Merge input files: day4all_resbelowsed, day5all_resbelowsed, day6all_resbelowsed; output: manhassetall_resbelowsed.shp. Left field mapping at the defaults. Source_Used_Citation_Abbreviation: day4all_resbelowsed.shp Source_Used_Citation_Abbreviation: day5all_resbelowsed.shp Source_Used_Citation_Abbreviation: day6all_resbelowsed.shp Process_Date: 201010 Source_Produced_Citation_Abbreviation: manhassetall_resbelowsed.shp Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Entity point Point_and_Vector_Object_Count: 608184 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000001 Longitude_Resolution: 0.000001 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: D_WGS_1984 Ellipsoid_Name: WGS_1984 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257224 Vertical_Coordinate_System_Definition: Depth_System_Definition: Depth_Datum_Name: Local surface Depth_Resolution: 0.1 Depth_Distance_Units: meters Depth_Encoding_Method: Explicit depth coordinate included with horizontal coordinates Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: manhassetall_resbelowsed Entity_Type_Definition: ESRI point shapefile Entity_Type_Definition_Source: ESRI Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: ID Attribute_Definition: An automatically generated numeric value. Attribute_Definition_Source: Avenue script. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 0 Attribute: Attribute_Label: DIST Attribute_Definition: Distance along the line in meters. Originally calculated by the AGI processing software. Attribute_Definition_Source: Software calculated. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.2 Range_Domain_Maximum: 3914.7 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: LONGITUDE Attribute_Definition: Longitude position of the point (decimal degrees, WGS84). Attribute_Definition_Source: U.S. Geological Survey - calculated by the avenue script used to process the data. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -73.731508 Range_Domain_Maximum: -73.700546 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: LATITUDE Attribute_Definition: Latitude position of the point (decimal degrees, WGS84). Attribute_Definition_Source: U.S. Geological Survey - calculated by the avenue script used to process the data. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 40.796336 Range_Domain_Maximum: 40.838912 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: UTMX Attribute_Definition: Easting position of the point in meters (UTM, Zone 18, WGS84). Attribute_Definition_Source: U.S. Geological Survey - calculated by the avenue script used to process the data. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 606959.4 Range_Domain_Maximum: 609559.9 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: UTMY Attribute_Definition: Northing position of the point in meters (UTM, Zone 18, WGS84). Attribute_Definition_Source: U.S. Geological Survey - calculated by the avenue script used to process the data. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 4516948.8 Range_Domain_Maximum: 4521656.2 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: DEPTH Attribute_Definition: Depth (meters) of the resistivity value below the water surface (not tide corrected - local surface). Attribute_Definition_Source: Acquisition/processing software derived. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -12.32 Range_Domain_Maximum: -0.2 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: DEP_B_SED Attribute_Definition: Depth (meters) of the value below the sediment/water interface. Attribute_Definition_Source: Processing software derived (MATLAB - justbelowsed.m). Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -12.12 Range_Domain_Maximum: 0 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: RESVALUE Attribute_Definition: Resistivity value of the data point in ohm-m. Attribute_Definition_Source: Processing software calculated (AGI EarthImager). Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.1 Range_Domain_Maximum: 877.74 Attribute_Units_of_Measure: ohm-m Attribute: Attribute_Label: RESLOGVAL Attribute_Definition: Log(10) of the resistivity value. Attribute_Definition_Source: Processing software calculated (MATLAB justbelowsed.m). Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -1 Range_Domain_Maximum: 2.943366 Attribute_Units_of_Measure: Log(10) of ohm-m Attribute: Attribute_Label: LINE Attribute_Definition: The alphanumeric name corresponding to the individual line of data collection that the point comes from. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set. Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: VeeAnn A. Cross Contact_Organization: U.S. Geological Survey Contact_Position: Marine Geologist Contact_Address: Address_Type: mailing and physical address Address: Woods Hole Coastal and Marine Science Center Address: 384 Woods Hole Rd. 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 Resource_Description: Downloadable Data Distribution_Liability: Neither the U.S. government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: WinZip Format_Version_Number: 9.0 Format_Information_Content: This WinZip file contains the point shapefile as well as the associated metadata files. Transfer_Size: 19.6 MB Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/2011/1041/data/resistivity/shapefile/manhassetall_resbelowsed.zip Network_Resource_Name: http://pubs.usgs.gov/of/2011/1041/html/catalog.html Offline_Option: Offline_Media: CD-ROM Recording_Capacity: Recording_Density: 640 Recording_Density_Units: MB Recording_Format: ISO9660 Fees: None. Technical_Prerequisites: This WinZip file contains data available in ESRI point shapefile format. The user must have software capable of uncompressing the WinZip file and reading/displaying the shapefile. Metadata_Reference_Information: Metadata_Date: 20120112 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: VeeAnn A. Cross Contact_Organization: U.S. Geological Survey Contact_Position: Marine Geologist Contact_Address: Address_Type: mailing and physical address Address: Woods Hole Coastal and Marine Science Center Address: 384 Woods Hole Rd. 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 Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile