Geostatistics Interceded Groundwater Quality Study with Emphasis on Kriging Across the Andhra Pradesh State of India

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Geospatial Analytics for Environmental Pollution Modeling

Abstract

This work aims to use geostatistical tools to understand the spread of groundwater quality variables across the state. Ordinary kriging, simple kriging, and universal kriging techniques were used in this study with root mean square error (RMSE), mean square error (MSE), root mean square standardized error (RMSSE), and averaged standard error (ASE) metrics. Groundwater quality variables such as bicarbonate, chloride, electrical conductivity, fluoride, potassium, magnesium, sodium, nitrate, pH, SAR, and sulfate were tested in this study over a GIS workspace. A correlation map was generated to show the strong correlation between the variables. Principal component analysis was performed to extract principal components from the dataset. Cluster analysis was performed, and 9 clusters were obtained. The size of the first cluster is 904, with an explained proportion of within-cluster heterogeneity of 0.979 and a silhouette score of 0.629. The total sum of squares for all the clusters is 13,740, and the sum of squares value is 3697.

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Acknowledgments

The authors thank the Central Pollution Control Board, Government of India, for making the data available for this research through the website.

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The authors declare no conflict of interest.

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Mogaraju, J.K. (2023). Geostatistics Interceded Groundwater Quality Study with Emphasis on Kriging Across the Andhra Pradesh State of India. In: Mushtaq, F., Farooq, M., Mukherjee, A.B., Ghosh Nee Lala, M. (eds) Geospatial Analytics for Environmental Pollution Modeling. Springer, Cham. https://doi.org/10.1007/978-3-031-45300-7_12

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