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Basin-wide hydraulic and material behaviors of a river are important factors reflected in basic indicators that are used to form consensus among residents for a river project in both environmental aspects and flood control and water utilization aspects. These indices are used for preserving ecosystem and maintaining river channels, banks and structures. We studied how runoff characteristics and water components of a river relate to the geology, climate and land use in some river basins in Hokkaido using multiple regression analysis. We found that hydraulic parameters tend to vary according to geology, which confirms past studies. We also found that water quality components were greatly affected by geology, such as the distribution of plutonic rock, metamorphic rock and unconsolidated sediment, although the data covers normal time only. This could prove to be an important consideration in river management

RELATIONSHIP BETWEEN A RIVER BASIN CONDITIONS AND THE HYDRAULIC PARAMETERS AND WATER QUALITY COMPONENTS OF THE RIVER IN A SNOWY, COLD REGION