groundwater statistics Articles
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Arsenic and heavy metals contamination, risk assessment and their source in drinking water of the Mardan District, Khyber Pakhtunkhwa, Pakistan
The present study was conducted to investigate the physico-chemical characteristics in drinking water of Mardan District, Pakistan. Furthermore, water quality was evaluated for the risk assessment of arsenic and heavy metals (HMs) and their contamination sources. Representative groundwater samples of shallow and deep sources were collected in the study area. These samples were analyzed for ...
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Characterisation of arsenic contamination in groundwater by statistical methods
Statistical investigation on groundwater arsenic concentration data of southwest Bangladesh was performed. Two data sets of 1998–99 and 2002–03 were selected for this analysis. Summary statistics of the data shows that the mean concentration exceeds the Bangladesh limit (0.05 mg/l) in all areas. Normality of arsenic concentration data was checked by frequency histogram, skewness coefficient and ...
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Geochemical classification of groundwater using multivariate statistical analysis in Latvia
Multivariate statistical methods – principal component analysis (PCA) and hierarchical cluster analysis (HCA) – are applied to identify geochemically distinct groundwater groups in the territory of Latvia. The main processes observed to be responsible for groundwater chemical composition are carbonate and gypsum dissolution, fresh and saltwater mixing and ion exchange. On the basis of major ...
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Evaluation of xenobiotic impact on urban receiving waters by means of statistical methods
Xenobiotics in urban receiving waters are an emerging problem. A sound knowledge of xenobiotic input, distribution and fate in the aquatic environment is a prerequisite for risk assessments. Methods to assess the impact of xenobiotics on urban receiving waters should address the diverse characteristics of the target compounds and the spatiotemporal variability of concentrations. Here, we present ...
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The need for specialized statistical software for ground-water analysis
Peer-reviewed guidance documents for the statistical analysis of ground-water monitoring data have been available for years, from the US EPA and from other bodies such as state Departments of Environmental Quality and ASTM. The truth, however, is that many of the statistical requirements are not being enforced by state regulators, with the result that statistics — where performed at all ...
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The Effectiveness of Intrawell ground water monitoring statistics
Abstract The reality of the new statistical evaluation requirements for ground water at Subtitle D facilities are being felt nationwide. All too often these requirements are resulting in unnecessary increases in ground water monitoring costs and erroneous indications of facility impacts. For example, a common situation faced by many older facilities is that there is statistically significant ...
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Managing RCRA statistical requirements to minimize ground water monitoring costs
Abstract This paper will provide an overview of how ground water monitoring statistical choices can significantly impact a facility's ground water monitoring costs. For example, a recent study analyzed the long term ground-water monitoring cost impacts of different statistical analysis approaches on over 20 landfills. The study found that the choice of statistical approach can make over a 50% ...
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Identification of groundwater pollution sources based on a modified plume comparison method
The identification of groundwater contaminant sources is a primary step in designing and implementing a remediation strategy. The work presented here was undertaken to develop an efficient strategy that addresses the unknown multiple contaminant sources problem, and that could identify the number, location and magnitude of the groundwater contaminant sources and select optimal sampling ...
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Assessing water demands and coverage sensitivity to climate change in the urban and rural sectors in central Chile
Snow dominated basins in the subtropics are susceptible to climate change, since evaporation and streamflows are affected, impacting key water sectors and increasing the risk of water shortages. This paper shows an integrated assessment of the impacts of climate change on the major water users in the Maipo Basin of Chile, allowing a direct comparison between competing sectors, describing their ...
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Analysis and assessment of confined and phreatic water quality using a rough set theory method in Jilin City, China
In groundwater quality assessments it is easier and more effective to reduce the number of parameters included in water quality indices. A total of 20 quaternary loose rock pore water and tertiary clastic rock cranny pore water data sets were used for Jilin City, China, as basic data, and 10 water quality parameters were selected for reduction using rough set theory and a statistical analysis ...
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Groundwater level response to hydrogeological factors in a semi-arid basin of Beijing, China
In this study, the mode of groundwater level fluctuations is analyzed by statistical approaches for 51 monitoring wells located in a semi-arid basin in Beijing from 1998 to 2013. Firstly, a geostatistical method was performed to characterize the spatial and temporal behaviors of data sets and analyze the responding mechanism of groundwater level to hydrologic features using the Geostatistics ...
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Hydrogeochemistry and groundwater quality assessment of Astaneh–Kouchesfahan Plain, Northern Iran
In this study, the hydrochemical characteristics of 230 bore well samples were analysed in Astaneh–Kouchesfahan Plain. Data interpretation shows that alkaline earths (Ca2+ and Mg2+) exceed the alkalis (Na+ and K+) and weak acids (HCO3−) exceed the strong acids (Cl− and SO42−) and Ca–HCO3 type is the dominant hydrochemical facies. The distribution patterns of the ...
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