Groundwater depletion and quality deterioration due to environmental impacts in Maheshwaram watershed of R.R. district, AP (India)

Abstract

Maheshwaram watershed is situated in Ranga

Principal component analysis of fluoride geochemistry of groundwater in Shanxi and Inner Mongolia, China

“…This observation suggested that the solubility of fluorite and calcite controls the groundwater compositions of components such as F, Ca and carbonate. In line with our results, previous studies have noted that natural groundwater containing elevated F concentrations are often in equilibrium with calcite (Purushotham et al, 2011;Rao, 2011). The equilibrium relationship between F and Ca is constrained by fluorite (CaF 2 ) as shown in Eq.…”

“…PCS1, which explained 34.5% of the total variance, was mainly influenced by Na, HCO 3 , TDS, SO 4 , pH, Cl, Ca, and F. This component represented major cations and anions resulting from the mineral weathering and water-rock interactions in the aquifer (Purushotham et al, 2011). Therefore, this natural process plays a significant role in the occurrence of F in Shanxi.…”

“…The F concentration depends on the groundwater chemistry including pH and the concentrations of Na, Ca, and HCO 3 (Guo et al, 2010;Young et al, 2011). To find the controlling parameters from large sets of groundwater chemistry data, principal component analysis (PCA) is widely applied as an objective method in geochemistry (Helena et al, 2000;Purushotham et al, 2011;Sarbu and Pop, 2005;Stetzenbach et al, 2001). For example, using PCA analysis and petrological study, Naseem et al found that high F groundwater originates from granitic rocks, typically from albite, biotite, hornblende and pyroxene (Naseem et al, 2010).…”

Assessment of groundwater quality for drinking and irrigation use in shallow hard rock aquifer of Pudunagaram, Palakkad District Kerala

“…Takem et al (2010) carried out groundwater study from springs and bore wells in a alluvial aquifer and conclude that the area is contaminated with nitrate pollution due to anthropogenic activities. Purushotham et al (2011) has carried out similar studies of groundwater and conclude that the groundwater deteriorated due to rapid urbanization. Suyash and Pawar (2011) has carried out accentuation of heavy metals in groundwater and its spatio-temporal variation through using GIS techniques in Ankaleshwar industrial estate, India and conclude that the GIS techniques have facilitated the monitoring of spatio-temporal behaviors of heavy metals and site-specific accretion pattern using raster and color composite maps of shallow groundwater system.…”

Principal component analysis and hierarchical cluster analyses of arsenic groundwater geochemistry in the Hetao basin, Inner Mongolia

“…The major ions (i.e., Cl, Na, K, and Mg) are associated with hydrochemical variables from mineral weathering and water-rock interactions in the aquifer, which indicates that F1 would reflect climatic and geological (lithological) effects. Other studies also showed that major ions reflected effects of geothermal system and mineral weathering (Al-Farraj et al, 2013;Brahman et al, 2013;Chapagain et al, 2010;Purushotham et al, 2011). However, the water quality variables, like HCO 3 and NH 4 -N, are closely related to organic matter contents in the aquifers (Jia et al, 2014;Oremland and Stolz, 2005).…”