摘要
在确保沙量守恒的非恒定流、非均匀沙的二维水沙数学模型的基础上,通过洞庭湖水沙输运和河床变形计算实践,比较了两种冲泻质与床沙质的转化模式,提出了包括冲泻质在内的泥沙淤积模式和水沙动边界计算模式。从洞庭湖泥沙输运和河床变形计算的结果看,洞庭湖泥沙淤积数值模式具有较好的稳定性和较高的模拟精度,说明所建湖泊泥沙模型的良好性能和具有推广运用的前景。
According to the sand conservation and the characteristics of flow and sediment transports of lake, a two-dimensional unsteady flow and nonuniform sediment model is established. The paper compares the two transformation modes of wash load and bed material load, by calculating flow and sediment transports and riverbed deformation of Dongting Lake. Based on the above, the modes of sediment deposit and moving water-and-sand boundary, especially for wash load, are put forward. The calculated results prove that the numberical mode of sediment deposit for the Dongting Lake possesses better sability and higher simulant precision. It is showed that the established deposited model for the lake has good performance and popularizing prospect.
出处
《水科学进展》
EI
CAS
CSCD
北大核心
2006年第2期246-251,共6页
Advances in Water Science
基金
国家自然科学基金重大项目(50099620)
国家自然科学基金委员会和水利部长江水利委员会共同资助~~
关键词
无结构网格
有限控制体积法
泥沙输运
淤积模式
unstructured grids
finite volume algorithm
sediment transport
deposited mode
