Electrical Resistivity Tomography (ERT) Surveys on Cedar River Floodplain, Cedar Rapids, Iowa, 2015

Electrical resistivity tomography (ERT) surveys were collected in April 2015 to support hydrogeologic characterization of the alluvial aquifer and to assess the suitability of larger-scale airborne geophysics. For this investigation, five sites were surveyed with ERT methods. At each site three surveys were collected, including: dipole-dipole, Schlumberger, and inverse Schlumberger configurations. For each survey a total of 56 electrodes spaced 5-meters (m) apart were used. During the ERT measurement, current is injected through two current electrodes and voltage is measured sequentially across multiple pairs of potential electrodes, which is used to determine the apparent resistivity of the subsurface. Results were combined into a merged dataset. ERT surveys can be inverted to obtain resistivity profiles that can be interpreted for subsurface layers. This data release provides only the raw ERT data.

Data e Risorse

Campo Valore
accessLevel public
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identifier USGS:5d02959ce4b05cc71caf1141
metadata_type geospatial
modified 20200813
old-spatial -91.80633, 41.97710, -91.64703, 42.06918
publisher U.S. Geological Survey
publisher_hierarchy Department of the Interior > U.S. Geological Survey
resource-type Dataset
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spatial {"type": "Polygon", "coordinates": [[[-91.80633, 41.97710], [-91.80633, 42.06918], [ -91.64703, 42.06918], [ -91.64703, 41.97710], [-91.80633, 41.97710]]]}
theme {geospatial}
Gruppi
  • AmeriGEOSS
  • National Provider
  • North America
Tag
  • amerigeo
  • amerigeoss
  • aquifer
  • bedrock
  • cedar-rapids
  • cedar-river
  • ckan
  • electrical-resistivity-imaging
  • environment
  • geo
  • geophysics
  • geoscientificinformation
  • geoss
  • iowa
  • national
  • north-america
  • united-states
  • usgs-5d02959ce4b05cc71caf1141
isopen False
license_id notspecified
license_title License not specified
maintainer Emilia L Bristow
maintainer_email ebristow@usgs.gov
metadata_created 2025-11-22T08:24:12.059412
metadata_modified 2025-11-22T08:24:12.059416
notes Electrical resistivity tomography (ERT) surveys were collected in April 2015 to support hydrogeologic characterization of the alluvial aquifer and to assess the suitability of larger-scale airborne geophysics. For this investigation, five sites were surveyed with ERT methods. At each site three surveys were collected, including: dipole-dipole, Schlumberger, and inverse Schlumberger configurations. For each survey a total of 56 electrodes spaced 5-meters (m) apart were used. During the ERT measurement, current is injected through two current electrodes and voltage is measured sequentially across multiple pairs of potential electrodes, which is used to determine the apparent resistivity of the subsurface. Results were combined into a merged dataset. ERT surveys can be inverted to obtain resistivity profiles that can be interpreted for subsurface layers. This data release provides only the raw ERT data.
num_resources 2
num_tags 18
title Electrical Resistivity Tomography (ERT) Surveys on Cedar River Floodplain, Cedar Rapids, Iowa, 2015