https://data.amerigeoss.org/dataset/4275058d-7c34-4b9d-b6fa-bf31a90101e5
type: Dataset
contact point: Organization
  fn: VeeAnn A. Cross
keyword: u-s-geological-survey
keyword: trackline
keyword: indian-river-inlet
keyword: navigation
keyword: holts-landing
keyword: geoss
keyword: r-v-knob
keyword: ckan
keyword: lowrance-gps
keyword: geo
keyword: crp
keyword: north-america
keyword: whcmsc
keyword: continuous-resistivity-profiling
keyword: sussex-county
keyword: open-file-report-2011-1039
keyword: north-atlantic-ocean
keyword: cmgp
keyword: geospatial-datasets
keyword: usgs
keyword: delaware
keyword: national
keyword: shapefile
keyword: info-bank-id-k-6-10-dl
keyword: amerigeoss
keyword: navigational-data
keyword: oceans
keyword: united-states
keyword: rosedale-beach
keyword: amerigeo
keyword: coastal-and-marine-geology-program
keyword: location
keyword: polyline
keyword: woods-hole-coastal-and-marine-science-center
keyword: indian-river-bay
keyword: field-activity-number-2010-006-fa
keyword: piney-neck
theme: {geospatial}
description: A geophysical survey to delineate the fresh-saline groundwater interface and associated sub-bottom sedimentary structures beneath Indian River Bay, Delaware, was carried out in April 2010. This included surveying at higher spatial resolution in the vicinity of a study site at Holts Landing, where intensive onshore and offshore studies were subsequently completed. The total length of continuous resistivity profiling (CRP) survey lines was 145 kilometers (km), with 36 km of chirp seismic lines surveyed around the perimeter of the bay. Medium-resolution CRP surveying was performed using a 50-meter streamer in a bay-wide grid. Results of the surveying and data inversion showed the presence of many buried paleochannels beneath Indian River Bay that generally extended perpendicular from the shoreline in areas of modern tributaries, tidal creeks, and marshes. An especially wide and deep paleochannel system was imaged in the southeastern part of the bay near White Creek. Many paleochannels also had high-resistivity anomalies corresponding to low-salinity groundwater plumes associated with them, likely due to the presence of fine-grained estuarine mud and peats in the channel fills that act as submarine confining units. Where present, these units allow plumes of low-salinity groundwater that was recharged onshore to move beyond the shoreline, creating a complex fresh-saline groundwater interface in the subsurface. The properties of this interface are important considerations in construction of accurate coastal groundwater flow models. These models are required to help predict how nutrient-rich groundwater, recharged in agricultural watersheds such as this one, makes its way into coastal bays and impacts surface water quality and estuarine ecosystems. For more information on the survey conducted for this project, see https://cmgds.marine.usgs.gov/fan_info.php?fan=2010-006-FA.
issued: 2025-11-21T07:06:07.337475
modified: 20200908
spatial: Location
title: Ship tracklines along which continuous resistivity profiling data were collected in the Indian River Bay, Delaware, on April 14, 2010, on U.S. Geological Survey Field Activity 2010-006-FA (JD104GPS_LINES.SHP, Geographic, WGS 84)

Digital Data
type: Distribution
access URL: https://pubs.usgs.gov/of/2011/1039/html/ofr2011-1039-catalog.html
media type: application/http
description: Landing page for access to the data
format: XML
issued: 2022-07-28T19:30:59.163728
modified: 2025-11-21T07:06:07.318862

Original Metadata
type: Distribution
access URL: https://data.usgs.gov/datacatalog/metadata/USGS.c8318bb9-d6ea-4846-86b6-20aa379f5598.xml
media type: text/xml
description: The metadata original format
format: XML
issued: 2022-07-28T19:30:59.163722
modified: 2025-11-21T07:06:07.318449

US Migrating
type: Agent