Water Quality

Environmental Hydrology, Water Quality Chemistry and Water Quality Biology

Yasushi Sakamoto


My group conducts research on the movement of pollutants in water cycles. With flow in soil as the primary theme, we deal with the vertical seepage in unsaturated soil and with horizontal movement in ground water, to estimate the flow based on the analysis of pollutant sources in groundwater and water quality analysis. We not only consider chemicals, but pathogenic microorganisms. Finally, we hope that our research on unclear aspects necessary to perform risk assessments, and aspects of exposure assessments performed to estimate what quantity of pollutants will travel how far through which routes will contribute to technological development.

Junko Shindo


Kei Nishida


I research nutrient/microorganism dynamics in terrestrial ecosystem driven by hydrologic flow. To hold clearer discussions on carbon sequestration by forest and the riverine linkage between land and the sea, our team is analysing major sources of carbon, nitrogen and other nutrients for estimating these fluxes through river systems in forest, agricultural and urban land uses. On the other hands, though appreciating the great benefit from natural water resources in many Asian regions, we can't give a reliable answer immediately how likely we are to suffer from waterborne infections by drinking ground waters or stream waters, or bathing in environmental waters. We are conducting a wide range of field surveys in our home ground, Fuji River Basin in Yamanashi, Japan, extending the activities from headwaters to slum areas in Asian countries, and expecting a practical contribution for understanding water environments and mitigating water-related problems with new findings and proposals.

Takashi Nakamura


Groundwater system analysis by stable isotopic analysis

Sadhana Shrestha


University of Yamanashi   Graduate Faculty of Interdisciplinary Research
Interdisciplinary Centre for River Basin Environment
4-3-11 Takeda, Kofu Yamanashi 400-8511 Japan

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