Abstract
Thermal environmental in urban river system can be significantly changed due to urbanization. In statistic respect, the long-term change in the stream temperature of an urban river system and its relevant factors are reported by Kinouchi (2005). In this paper, concentrated observation and dynamic simulation about heat transport were approached.
Firstly, we clarified the actually state of heat transport in lower reaches of the Ara River by concentrated observation. Next, stream temperature was reproduced using one-dimensional model integrated water and heat transport process. Each parameter was defined by result of field observation. Finally, wastewater impact on stream temperature in lower reaches of the Ara River was quantitatively evaluated using a dynamic simulation model. Consequently, it was found that wastewater increase stream temperature 3°C in the maximum in winter.
