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Spatial Variability of Arsenic in Groundwater (Case Study of Bangladesh)

Abu Hassan, Haneysa (2008) Spatial Variability of Arsenic in Groundwater (Case Study of Bangladesh). Universiti Teknologi Petronas. (Unpublished)

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Abstract

The spatial variability study of arseruc concentration in Bangladesh has been characterized in using Geostatistical method. The study involved 1636 sample points of groundwater in 41 of 64 districts in Bangladesh. Based on the sample points, approximately 54% and 90% of them are exceeding the Bangladesh drinking standard (<50J..lg/L) and WHO drinking standard (<10J..lg/L) respectively. Geostatistical characterization by semivariogram analysis indicated distances over which data are correlated (range), the extent of variability (sill) and degree of spatial dependencies (nugget to sill ratio). Based on the analysis, all the parameters suggested that all the spatial dependencies, variability and autocorrelation are influenced by increasing depth segments. It is shown that there are moderate to weak dependency (all above 50%), higher variability and farther distant or range towards increasing depth segments of wells. Kriging interpolated these data points and produced a smoothed contour map that estimates unavailable data points in the map. This study indicates that geostatistical analysis could reveal spatial variability nature of the arsenic in groundwater in Bangladesh.

Item Type: Final Year Project
Academic Subject : Academic Department - Civil Engineering - Water and environment - Water
Subject: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Engineering > Civil
Depositing User: Users 2053 not found.
Date Deposited: 30 Sep 2013 16:55
Last Modified: 25 Jan 2017 09:45
URI: http://utpedia.utp.edu.my/id/eprint/7756

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