Multivariate approach for surface water quality mapping with special reference to nitrate enrichment in Sugadaira, Nagano Prefecture (Japan)

Pankaj Kumar (), Sho Iwagami, Liu Yaping, Makato Mikita, Tadashi Tanaka and Tsutomu Yamanaka
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Pankaj Kumar: University of Tsukuba
Sho Iwagami: University of Tsukuba
Liu Yaping: University of Tsukuba
Makato Mikita: University of Tsukuba
Tadashi Tanaka: University of Tsukuba
Tsutomu Yamanaka: University of Tsukuba

Environment Systems and Decisions, 2011, vol. 31, issue 4, 358-363

Abstract: 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.

Keywords: Wetland; Surface water chemistry; Land use/land cover; Statistical analysis (search for similar items in EconPapers)
Date: 2011
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DOI: 10.1007/s10669-011-9343-8

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