Author(s): M. Nakatsugawa; Y. Hamahara
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Keywords: No Keywords
Abstract: The largest one of oxbow-shaped river formed by the cut-off work of the Ishikari river is the Barato river where the multi-function consisting of flood regulation, fishing, as well as conservation of riparian environment are expected, while the water pollution like eutrophication has been the problem due to flow stagnancy and inflow of pollutant load from the urbanized area. In the Barato river locating in the snowy cold region, ice cover condition as well as much inflow due to snowmelt play an important role on water quality. A long-term model of water quality is needed to verify the effectiveness of environmental protection measures and changes in freezing and snowmelt caused by global warming. We propose a long-term water quality model that takes into account ice cover and inflow of pollutant loads in the snowmelt season. It was verified that the model can calculate the growth and decay of phytoplankton based on water budget, heat flux and pollutant load.
Year: 2004