Assessment of Groundwater Quality in Sunamganj of Bangladesh
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Iranian Association of Environmental Health (IAEH)
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In this study, groundwater quality in Sunamganj of Bangladesh was
studied based on different indices for irrigation and drinking uses.
Samples were investigated for sodium absorption ratio, soluble sodium
percentage, residual sodium carbonate, electrical conductance,
magnesium adsorption ratio, Kelly’s ratio,total hardness,
permeability index, residual sodium bi-carbonate to investigate the
ionic toxicity. From the analytical result, it was revealed that the
values of Sodium Adsorption Ratio indicate that ground water ofthe area
falls under the category of low sodium hazard. So, there was neither
salinity nor toxicity problem of irrigation water, so that ground water
can safely be used for long-term irrigation. Average Total Hardness of
the samples in the study area was in the range of between 215 mg/L at
Tahirpur and 48250mg/L at Bishamvarpur. At Bishamvarpur, the water was
found very hard. Average total hardness of the samples was in the range
of between 215 mg/L at Tahirpur and 48250 mg/L at Bishamvarpur. At
Bishamvarpur, the water was found very hard. It was shown based on GIS
analysis that the groundwater quality in Zone-1 could be categorized of
"excellent" class, supporting the high suitability for irrigation.In
Zone-2 and Zone-3, the groundwater quality was categorized as "risky"
and "poor" respectively. Thestudy has also made clear that GIS-based
methodology can be used effectively for ground water quality mapping
even in small catchments.
Keywords
kelly’s ratio, magnesium adsorption ratio, total hardness, residual sodium carbonate, Sodium absorption ratio
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