Vertical electrical sounding (VES) and multi-electrode resistivity in environmental impact assessment studies over some selected lakes

A case study

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A combined geophysical investigation consisting of vertical electrical sounding (VES) and multielectrode system was carried out to map the subsurface resistivity in all major lakes which are highly polluted by the discharge of sewage and other chemical effluents in greater Hyderabad, India. The structural features identified in the study area play a major role in groundwater flow and storage. The interpretation of geophysical data and lithologs indicates that a silt/clay zone (predominantly silt) has a thickness of 5-10 m all along the drainage from Patelcheruvu to the Musi River. The silt/clay zone inferred close to the lakes is a mixture of clay, silt and sand with more silt content as indicated from the lithologs during drilling. The low resistivity values obtained can be attributed to the pollutant accumulated in the silt which can reduce the resistivity values. Further, the TDS of the water samples in these wells are more than 1,000 mg/l which further confirms the above scenario. The pollution spread is less in the upstream areas whereas it is more in the downstream which can be attributed to the shallow water table conditions and also due to the interaction of surface water and groundwater.

Original languageEnglish
Pages (from-to)881-895
Number of pages15
JournalEnvironmental Earth Sciences
Volume65
Issue number3
DOIs
Publication statusPublished - Feb 2012

Fingerprint

vertical electrical sounding
Silt
Environmental impact assessments
environmental assessment
environmental impact assessment
electrodes
silt
Lakes
electrical resistivity
electrode
case studies
lakes
Electrodes
lake
Clay
clay
Groundwater flow
Water
groundwater flow
drilling

Keywords

  • Chemical effluents
  • Clay
  • Drainage
  • Groundwater
  • Lithologs
  • Multielectrode system
  • Pollution
  • Resistivity
  • Silt
  • Vertical electrical sounding

ASJC Scopus subject areas

  • Earth-Surface Processes
  • Geology
  • Global and Planetary Change
  • Pollution
  • Water Science and Technology
  • Environmental Chemistry
  • Soil Science

Cite this

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title = "Vertical electrical sounding (VES) and multi-electrode resistivity in environmental impact assessment studies over some selected lakes: A case study",
abstract = "A combined geophysical investigation consisting of vertical electrical sounding (VES) and multielectrode system was carried out to map the subsurface resistivity in all major lakes which are highly polluted by the discharge of sewage and other chemical effluents in greater Hyderabad, India. The structural features identified in the study area play a major role in groundwater flow and storage. The interpretation of geophysical data and lithologs indicates that a silt/clay zone (predominantly silt) has a thickness of 5-10 m all along the drainage from Patelcheruvu to the Musi River. The silt/clay zone inferred close to the lakes is a mixture of clay, silt and sand with more silt content as indicated from the lithologs during drilling. The low resistivity values obtained can be attributed to the pollutant accumulated in the silt which can reduce the resistivity values. Further, the TDS of the water samples in these wells are more than 1,000 mg/l which further confirms the above scenario. The pollution spread is less in the upstream areas whereas it is more in the downstream which can be attributed to the shallow water table conditions and also due to the interaction of surface water and groundwater.",
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author = "N. Sundararajan and S. Sankaran and Al-Hosni, {T. K.}",
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T2 - A case study

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AU - Sankaran, S.

AU - Al-Hosni, T. K.

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AB - A combined geophysical investigation consisting of vertical electrical sounding (VES) and multielectrode system was carried out to map the subsurface resistivity in all major lakes which are highly polluted by the discharge of sewage and other chemical effluents in greater Hyderabad, India. The structural features identified in the study area play a major role in groundwater flow and storage. The interpretation of geophysical data and lithologs indicates that a silt/clay zone (predominantly silt) has a thickness of 5-10 m all along the drainage from Patelcheruvu to the Musi River. The silt/clay zone inferred close to the lakes is a mixture of clay, silt and sand with more silt content as indicated from the lithologs during drilling. The low resistivity values obtained can be attributed to the pollutant accumulated in the silt which can reduce the resistivity values. Further, the TDS of the water samples in these wells are more than 1,000 mg/l which further confirms the above scenario. The pollution spread is less in the upstream areas whereas it is more in the downstream which can be attributed to the shallow water table conditions and also due to the interaction of surface water and groundwater.

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KW - Drainage

KW - Groundwater

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KW - Multielectrode system

KW - Pollution

KW - Resistivity

KW - Silt

KW - Vertical electrical sounding

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