Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Genesis of Arsenic‐Rich Groundwater and the Search for Alternative Safe Aquifers in the Gangetic Plain, India
Distribution and mobilization of groundwater arsenic from a 1580‐km2 area in the Gangetic Plain was studied. A two‐tier aquifer system made up of Quaternary sand layers exists within 300 m below ground. Arsenic concentration exceeding >50 μg/L is confined within the active floodplain of the Ganga River, affecting the top aquitard and upper 5‐ to 20‐m slice of the underlying shallow aquifer. The genesis of arsenic was investigated by principal component analyses involving total dissolved solids, Ca+2, Mg+2, Na+, K+, HCO3‐, Cl−1, SO4−2, NO3‐, Fetotal, and Astotal and analyzed for 57 groundwater samples, hydrochemical facies analyses, aquifer‐aquitard configuration, and water‐level behaviour. A 20‐ to 25‐m thick deeper aquifer, appearing at 190 to 205 m below ground and separated from the shallow aquifer by a thick clay sequence, was low in arsenic load (<2 μg/L). Hydrostratigraphy and pumping tests revealed that the deeper aquifer can be used for community drinking in contaminated areas.
Genesis of Arsenic‐Rich Groundwater and the Search for Alternative Safe Aquifers in the Gangetic Plain, India
Distribution and mobilization of groundwater arsenic from a 1580‐km2 area in the Gangetic Plain was studied. A two‐tier aquifer system made up of Quaternary sand layers exists within 300 m below ground. Arsenic concentration exceeding >50 μg/L is confined within the active floodplain of the Ganga River, affecting the top aquitard and upper 5‐ to 20‐m slice of the underlying shallow aquifer. The genesis of arsenic was investigated by principal component analyses involving total dissolved solids, Ca+2, Mg+2, Na+, K+, HCO3‐, Cl−1, SO4−2, NO3‐, Fetotal, and Astotal and analyzed for 57 groundwater samples, hydrochemical facies analyses, aquifer‐aquitard configuration, and water‐level behaviour. A 20‐ to 25‐m thick deeper aquifer, appearing at 190 to 205 m below ground and separated from the shallow aquifer by a thick clay sequence, was low in arsenic load (<2 μg/L). Hydrostratigraphy and pumping tests revealed that the deeper aquifer can be used for community drinking in contaminated areas.
Genesis of Arsenic‐Rich Groundwater and the Search for Alternative Safe Aquifers in the Gangetic Plain, India
Saha, Dipankar (Autor:in) / Shukla, R.R. (Autor:in)
Water Environment Research ; 85 ; 2254-2264
01.12.2013
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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