Assessment of Key Ground Water Quality Parameters and Their Mapping Using GIS in Central Brahmaputra Valley Zone of Assam, India | Chapter 05 | Current Research in Science and Technology Vol. 2
Groundwater is considered as one of
major part of the purest forms of water available in nature. Hence, to
understand the use of the ground water resources and to get sustainable ground
water quality the fundamental characteristics of the groundwater need to be
analyzed. In the present study, GIS-based mapping of the groundwater in the
central Brahmaputra Valley Zone is done with a view to observe the various
quality characters. The results of this investigation could be used by
decision-makers for the sustainable management of groundwater resources. The
groundwater pH of the district was found to be within the desirable limit as
recommended by WHO but 67.30% sample covering 79% of the total geographical
area of the district was slightly alkaline in nature. Groundwater quality
parameters that surpassed the desirable limit recommended by WHO, were
electrical conductivity and nitrate which accounted for 41.22% and 0.79% of the
total samples. Total Dissolved Solids, calcium, magnesium, carbonate,
bicarbonate and nitrate in groundwater were recorded within the desirable limit
of WHO and thus could be considered as safe. Spatial autocorrelation run for
all the quality parameters with respect to their positions and values over the
entire district envisaged the possibilities of forming different pattern namely
CLUSTER for pH, EC, As, F, Fe, Al, Mn,HCO3, RANDOM for Mg, Ca, CO3,
NO3, SO4 and DISPERSED for TDS. GIS-aided mapping of
groundwater quality parameters embracing their category wise spatial
distribution, area, maximum and minimum values, surface autocorrelation of
observed values could give a better idea to opt for suitable need-based
management strategy for the entire district.
Author(s) Details
Dr. I. H. Thakuria
Agricultural Development
Officer, Government of Assam, India.
P. P. Hazarika
Department of Soil Science,
Assam Agricultural University, Assam, India.
Dr. B. K. Medhi
Department of Soil Science,
Assam Agricultural University, Assam, India
Mr. K. Deka
Assam Agricultural
University, Assam, India.
Dr. N. Rahman
RARS, Sillongoni, Assam,
India.
Dr. N. Baruah
Biswanath College of
Agriculture, Assam Agricultural University, Assam, India.
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