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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Managing deltas : Using water age to quantify the hydrodynamic circulation in lake taihu with d-flow flexible mesh
Using water age to quantify the hydrodynamic circulation in lake taihu with d-flow flexible mesh
Author : SIEN LIU(1), QINGHUA YE (1,2) & MARCEL STIVE(1)
ABSTRACT
Being the third largest freshwater lake and located in one of the most prosperous areas in China, Lake Taihu is suffering from cyanobacteria blooms and severe eutrophication problems. The local government has taken steps to both restrict the sewage effluent of nearby plants and transfer water from Yangtze River to flush Lake Taihu. However, the current ecological condition of Lake Taihu still needs improvement. The lack of knowledge on the lake's hydrodynamic circulation dynamics is one of the main reasons for the deficiency of present improvement measures. Moreover, although the hydrodynamics of the lake has been studied quite extensively, virtually no attention has been given to the river network between Lake Taihu and Yangtze River. The hypothesis that the river network is important is supported by the fact that Lake Taihuí»s hydrodynamics is strongly influenced by river inflow and outflow discharge from the river network. Thus, a three-dimensional hydrodynamic model using D-Flow Flexible Mesh (D-Flow FM) is setup and calibrated. D-Flow FM is the new computational engine for the unstructured grid in 1D, 2D and 3D. The entire Taihu Basin river network is included in the model using D-Flow FM, with the river branches and Lake Taihu in 1D and 2D model. Using the concept of water age, hydrodynamic circulation indices are applied to indicate the circulation efficiency and evaluate the sensitivity of the environmental conditions.
File Size : 364,234 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Managing deltas
Date Published : 28/08/2015
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