Hydrogeochemistry of the Sarada river basin,Visakhapatnam district,Andhra Pradesh,India |
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| Authors: | D John Devadas N Subba Rao B Thirupathi Rao K V Srinivasa Rao A Subrahmanyam |
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| Institution: | (1) Department of Geology, Andhra University, Visakhapatnam, 530 003, India;(2) Department of Geology, Hindu College, Guntur, 522 001, India |
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| Abstract: | Systematic hydrogeochemical survey has been carried out for understanding the sources of dissolved ions in the groundwaters
of the area occupied by Sarada river basin, Visakhapatnam district, Andhra Pradesh, India. Khondalites, charnockites and granite
gneisses and calc-granulites of Precambrians and alluvial deposits of Quaternaries underlie the study area. Groundwaters are
both fresh and brackish; the latter waters being a dominant. Most groundwaters are characterized by Na+:HCO3− facies due to chemical weathering of the rocks. Enrichment of Na+, K+, Cl−, SO42−, NO3− and F− in some groundwater samples is caused by seawater intrusion, locally accompanied by ion-exchange, and anthropogenic activities,
resulting in an increase of brackish in the groundwaters. Based on the results of this hydrogeochemical study, suitable management
measures are recommended to solve the water quality problems. |
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| Keywords: | Hydrogeochemistry Water quality management Sarada river basin Visakhapatnam district Andhra Pradesh India |
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