INFLUENCE OF WATER TEMPERATURE OF RIVER BY CLIMATE CHANGE

Abstract

The water temperature in the Natori River basin located at Miyagi prefecture is evaluated combining a hydrological model and a heat budget model. This model simulates spatial and temporal distribution of temperature in March, August, and December 2003. In addition, applying this model to the climate changes that involving temperature rise, reducing precipitation, and decreasing a snowmelt, we calculated the water temperature change on these conditions. As results, we found that there is no influence to change the water temperature in rainfall, and that it has enormous influence in combining with the factors which are the temperature and sunshine durations directly related to the water temperature.