Sub-Surface Investigation Using Vertical Electrical Sounding: Chennai Metropolitan Area
The data or information on the sub-stratum, nature of aquifers, their spatial disposition, their hydrogeological characteristics and other information, are limited particularly in urban context. The study was performed in the Chennai metropolitan area. The objective of the study was to get the sub-s...
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Veröffentlicht in: | Current world environment 2018-12, Vol.13 (3), p.317-330 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The data or information on the sub-stratum, nature of aquifers, their spatial disposition, their hydrogeological characteristics and other information, are limited particularly in urban context. The study was performed in the Chennai metropolitan area. The objective of the study was to get the sub-surface information of the study area. The vertical electrical sounding was performed at ninety locations to identify the sub surface lithology. The Archaeans consisting of Charnockites, gneisses and dolerite occupy the southern part of the Metropolitan area. The lower portion of gondwanas belonging to the Talchir beds consist of light brown and green colored Shales occurring below the alluvium in the area between Nandanam on the east to Nandambakkam on the west. These Shales are overlying the older crystalline rocks. The lower portion of gondwanas belonging to the Talchir beds consist of light brown and green coloured Shales occurring below the alluvium in the area between Nandanam on the east to Nandambakkam on the west The Tertiary bed comprising friable white and reddish brown Sandstone occurs on the western side near Chembarambakkam and on the northwestern side between Thirunindravur and Villiwakkam. The thickness of the alluvium ranges between 5m on the southern side to a little more than 20m on the east central part of the Metropolitan area. |
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ISSN: | 0973-4929 2320-8031 |
DOI: | 10.12944/CWE.13.3.06 |