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Srinivasa Rao, K. V.
- Hydrogeochemistry and Groundwater Quality in a Developing Urban Environment of a Semi-Arid Region, Guntur, Andhra Pradesh
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Authors
Affiliations
1 Department of Geology, Andhra University, Visakhapatnam - 530 003, IN
1 Department of Geology, Andhra University, Visakhapatnam - 530 003, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 59, No 2 (2002), Pagination: 159-166Abstract
This paper describes the results of hydrogeochemistry and groundwater quality to generate baseline information on groundwater resources in the developing urban area of Guntur, Andhra Pradesh. The area falls under a semi-arid type of climate and consists of charnockites and alluvium. Groundwaters are mostly brackish type, having Na<sup>+</sup>:Cl<sup>-</sup>-facies, that are of meteoric origin. The waters are subjected to evaporation/evapotranspiration process under climatic influence aided by gentle slope, intensively irrigated lands and continued re-use and re-cycling of waters. This process tends to remove ions from the waters for formation of new clay minerals and precipitation of CaCO<sub>3</sub>.The soils in the area appear to have the ability to pick up these ionic species during the pre-monsoon season. In the subsequent post-monsoon period, the waters become more saline, which suggests that the ions are leachzd from soils by the infiltrating recharge waters and are added to the groundwater body. In accordance with the domestic and industrial water quality standards, these groundwaters are not safe. The urban authorities of the area, therefore, should take necessary ameliorative steps to overcome the adverse effects caused by the inferior quality of groundwater.Keywords
Hydrogeochemistry, Groundwater Quality, Urban Semi-Arid Region, Guntur, Andhra Pradesh.- Geochemistry of Carbonate Precipitation from the Groundwater in a Coastal Region
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Authors
N. Subba Rao
1,
K. V. Srinivasa Rao
1,
P. Surya Rao
1,
Ch. Venkat Rao
1,
K. Arjunudu
1,
P. Madhusudhana Reddy
2,
A. Subrahmanyam
3
Affiliations
1 Department of Geology, Andhra University, Visakhapatnam - 530 003, IN
2 Department Hyderabad of Geology, Dr. B. R. Ambedkar Open University, Hyderabad - 500 033, IN
3 Department of Geology, Hindu College, Guntur - 522 002, IN
1 Department of Geology, Andhra University, Visakhapatnam - 530 003, IN
2 Department Hyderabad of Geology, Dr. B. R. Ambedkar Open University, Hyderabad - 500 033, IN
3 Department of Geology, Hindu College, Guntur - 522 002, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 73, No 5 (2009), Pagination: 651-656Abstract
Groundwater samples were collected from a coastal region of Andhra Pradesh to assess the possible conditions of the formation of carbonates. The area experiences a semi-arid climate and is underlain by khondalites, over which the Quaternary sediments occur. The study of the geochemistry of groundwater indicates that groundwater is mostly of fresh, with alkaline nature. The study further suggest that the breakdown of feldspars as kaolinite during rock-water interaction, releases Ca2+. Soils/weathered products contribute high CO2 under the open system. The Ca2+ and CO2 are added to the groundwater through the infiltrating recharge water. They subsequently precipitate as fine-grained carbonates in the weathering profile due to evapotranspiration under a freshwater environment.Keywords
Groundwater Chemistry, Freshwater, Carbonates, Open System, Evapotranspiration, Coastal Region, Andhra Pradesh.References
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