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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Water engineering : Modelling study on density currents induced by temperature stratification of xiangxi bay, china
Modelling study on density currents induced by temperature stratification of xiangxi bay, china
Author : Zijun Hu(1,2,a), Lingling Wang(1,2,b), Hongwu Tang(1,2,c) & Yun Lang(3,d)
ABSTRACT
In recent years, a series of water environment problems induced by temperature stratification in huge reservoirs have got
wide attention. A 3 dimensional (3D) temperature mathematical model under Z coordinate is established for the Xiangxi
Bay (XXB) of the Three Gorges Reservoir (TGR) to simulate the temperature stratification and density currents of the
TGR respectively. The main results of the present work are as follows: The XXB is a seasonal temperature stratified
reservoir. Stratification is beginning to occur from spring, most significant in summer, beginning to weaken from
September. In the horizontal direction, the temperature gradient along the flow direction is significant in summer and
winter, and the lateral temperature gradient is almost zero all year round. Non-ignorable water density difference induced
by the temperature stratification between the main stream of the TGR and the XXB, which makes the main stream of the
TGR flow into the XXB at the middle level during stratified periods. The thickness, depth and distance of the density
currents at the estuary of the XXB are different with the water level of the TGR and water level range per day. Also, the
upstream flow of the Xiangxi River often dives at the bottom of XXB.
File Size : 4,387,867 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water engineering
Date Published : 19/08/2015
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