IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 34th Congress - Brisbane (2011) : THEME 5: Environmental Hydraulics and Hydrology : Long-term predicting model for stream temperature variation in a mountainous river
Long-term predicting model for stream temperature variation in a mountainous river
Author : Yuki Kajikawa 1 and Hiroshi Yajima 1,2
In this study, a long-term simulation model for stream temperature variation was developed in order to predict the influence of a reservoir effluent on the downstream river environment. A 1D hydrodynamic MacCormack model was adopted along with thermodynamic models. The relation between flow discharge and stream-width was applied at the time of low flow discharge to accurately estimate surface thermodynamics. Moreover, the stream-width was calculated by the hydrodynamic model assuming compound cross-sections at the time of high flow discharge. Both methods were made to switch automatically according to the discharge. The model was applied to the field observation performed for the Fukuro River which flows through the mountainous area in Japan. The comparisons of the calculated results with observed data showed that the model has successfully reproduced the stream temperatures with approximately less than 1.0 oC differences.
File Size : 1,467,013 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 34th Congress - Brisbane (2011)
Article : THEME 5: Environmental Hydraulics and Hydrology
Date Published : 01/07/2011
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