2006060515331700FALSE20080225133911002008022513402000{8874F4E6-A250-4613-B342-6D62C1A016CB}Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780enContinuous resistivity profiling (CRP) surveys were conducted at Cape Cod National Seashore in 2004 and 2006 in order to test hypotheses about groundwater flow under and into estuaries and the Atlantic Ocean. Coastal resource managers here and elsewhere are concerned about nutrients that are entering coastal waters via submarine groundwater discharge, which are contributing to eutrophication and harmful algal blooms. CRP is used to measure electrical resistivity of sediments, a property that is sensitive to differences in salinity of submarine ground water. The 2004 and 2006 surveys used floating resistivity streamers of 100 m and 50 m respectively. The depth penetration of the streamers is approximately 20% of the streamer length which translates to approximately 20-25 m with the 100 m streamer and 12-14 m with the 50 m streamer. These data were processed using AGI's EarthImager 2D software.To provide raw resistivity data as collected by the AGI SuperSting system.John F. Bratton2008Raw Continuous Resistivity Profiles from Cape Cod National Seashore, May 20, 2004may20_raw.txthttp://pubs.usgs.gov/of/2006/1169/data/res_data/2004/raw_resis/may20_raw.zipSubmarine Hydrogeological Data from Cape Cod National SeashoreVeeAnn A. CrossJohn F. BrattonJohn CrusiusJohn A. ColmanTimothy D. McCobb2008Open-File Report2006-1169Woods Hole Science Center, Woods Hole, MAU.S. Geological Survey, Coastal and Marine Geology Programhttp://pubs.usgs.gov/of/2006/1169/Open-File Report2006-1169Woods Hole Science Center, Woods Hole, MAU.S. Geological Survey, Coastal and Marine Geology Programhttp://pubs.usgs.gov/of/2006/1169/htmldocs/catalog.htmground condition20040520None planned-70.036200-69.92248342.02205041.686800GeneralCMGPCoastal and Marine Geology ProgramContinuous Resistivity ProfilingCRPground-waterOF 2006-1169Open-File Reportsubmarine ground-waterU.S. Geological SurveyUSGSWoods Hole Science CenterWHSC field activity serial number 04014GeneralAtlantic OceanCape CodMassachusettsNorth AmericaUnited StatesCape Cod National SeashoregeoscientificInformationinlandWaterslocationISO 19115 Topic CategoryoceansNone.The U.S. Geological Survey must be referenced as the originator of the dataset in any future products or research derived from these data.Text FileJohn F. BrattonU.S. Geological Surveymailing and physical address384 Woods Hole Rd.Woods HoleMA02543-1598508-548-8700 x2254508-457-2210jbratton@usgs.govMicrosoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780may20_raw.txtenFGDC Content Standards for Digital Geospatial MetadataFGDC-STD-001-1998local timeVeeAnn A. CrossU.S. Geological SurveyMarine Geologistmailing and physical address384 Woods Hole Rd.Woods HoleMA02543-1598(508) 548-8700 x2251(508) 457-2310vatnipp@usgs.gov20080225http://www.esri.com/metadata/esriprof80.htmlESRI Metadata ProfileISO 19115 Geographic Information - MetadataDIS_ESRI1.0datasetDownloadable DataNeither 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.John F. BrattonU.S. Geological Surveymailing and physical address384 Woods Hole Rd.Woods HoleMA02543-1598(508) 548-8700 x2254(508) 457-2310jbratton@usgs.govAGIWinZip1.761.76None.These data are available in a format compatible with AGI Geosciences Marine Log Manager software. The user must have software capable of reading the AGI format in order to process these data.002Text File20080225The data were transferred from the logging computer via AGISSAdmin software. The data files available for this day are ccns1*, ccns2*, ccns3*, ccns4*, ccns5*, ccns6*, ccns7*, ccns8*, ccns9*, ccns10*, ccns11*, ccns12*, ccns15*, ccns16*, and ccns17*.2004John F. BrattonU.S. Geological Surveymailing and physical address384 Woods Hole Rd.Woods HoleMA02543-1598(508) 548-8700 x2254(508) 457-2310jbratton@usgs.govThe bathymetry text files needed to be merged with the GPS navigation files. The logging of the navigation files started at the same time as the logging of the resistivity files. Although the bathymetry data contains no time stamps, the assumption was made that the time span was the same as the navigation file. The bathymetry data was acquired in feet at a faster rate than the navigation data. An awk script was written to convert the bathymetry data to meters, pull the appropriate bathymetry point to match up with the navigation point, and output the format as SDDBT (the format that EarthImager expects). The points to pull was based on the assumption that the time span of navigation and bathymetry was the same, so took the total number of bathymetry points and divided it by the number of navigational fixes, and pulled the bathymetry point at that increment. Another awk script was written to merge the navigation data and bathymetry data into a single file.2004VeeAnn A. CrossU.S. Geological SurveyMarine Geologistmailing and physical address384 Woods Hole Rd.Woods HoleMA02543-1598(508) 548-8700 x2251(508) 457-2310vatnipp@usgs.gov$GPRMC lines with the GPS file that had bad time stamps or were otherwise corrupt were deleted.2004VeeAnn A. CrossU.S. Geological SurveyMarine Geologistmailing and physical address384 Woods Hole Rd.Woods HoleMA02543-1598(508) 548-8700 x2251(508) 457-2310vatnipp@usgs.govThese data were acquired with an AGI SuperSting Marine system that is described at the website: www.agiusa.com/marinesystem.shtml. The particular system used for this acquisition was an 11 stainless steel electrode array with electrodes spaced 10 meters apart. A dipole-dipole configuration was used for the data collection in which two fixed current electrodes are assigned with the measurement of voltage potentials between electrode pairs in the remaining electrodes. Each line of data acquisition records several files. The two files necessary for processing are the *.stg and *.gps file. The STG file contains the resistivity data, while the GPS file contains the navigation information. Bathymetry point data was collected with a separate system and logged as text files.Only those lines with valid resistivity data collected on this day are represented here.