河川水温の時空間偏差と変動

抄録

Water temperature is one of the most fundamental factors in evaluating river environment. Many studies have been made about detailed distribution of other physical factors such as bed material, velocity, etc. In actual river flow, water temperature also may have its own distribution in many scales and may fluctuate in association with solar radiation, flow configurations and other factors. However, water temperature had been represented in only one or few points in many studies.

As a result of simultaneous water temperature survey in hundreds of points, it became clear that there is spatial deviation and time fluctuation of water temperature even in the flow path which seems to be uniform. This paper reports the state of spatial and temporal bias and fluctuation of water temperature in actual river flow. It is also observed that the water body which was warmed in the specific section flows down the river.