Multivariate approach for surface water quality mapping with special reference to nitrate enrichment in Sugadaira,Nagano Prefecture (Japan) |
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Authors: | Email author" target="_blank">Pankaj?KumarEmail author Sho?Iwagami Liu?Yaping Makato?Mikita Tadashi?Tanaka Tsutomu?Yamanaka |
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Institution: | (1) Division of Geoenvironmental Science, Graduate School of Life and Environmental Sciences, University of Tsukuba, Room no. 318, Advance Research Building—A, Tsukuba City Ibaraki Prefecture, 305-8572, Japan;(2) Terrestrial Environment Research Center, Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan |
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Abstract: | The hydrochemical study of the surface water along with land-use/land-cover study of its catchment area is useful for determining
its suitability for support to aquatic ecosystem and agricultural purposes. The surface water quality around the wetland in
Sugadaira region, Japan, is being affected both by complex hydrogeochemical processes and by anthropogenic activity, mainly
intensive agricultural practices. Statistical analysis was carried out in this study using surface water chemistry data to
enable hydrochemical evaluation of the water quality based on the ionic constituents, water types, and factors controlling
water quality. Results show that the general trend of various ions was found to be Ca2+ > Mg2+ > Na+ > K+ and HCO3
− > NO3
− > SO4
2− > Cl−. Spatial distribution of water chemistry shows that enrichment of NO3
− has taken place along one side of the wetland that is exposed directly to human settlement and agricultural practices. This
study is vital considering that pollution in a wetland indicates that poor health of water resources in the region not only
makes the situation alarming but also calls for immediate attention. |
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Keywords: | |
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