Two-Dimensional Mathematical Model of Tidal Current and Sediment for Oujiang Estnary and Wenzhou Bay |
| |
Affiliation: | River and Harbor Department, Nanjing Hydraulic Research Institute, Nanjing 210024 , China River and Harbor Department, Nanjing Hydraulic Research Institute, Nanjing 210024 , China River and Harbor Department, Nanjing Hydraulic Research Institute, Nanjing 210024 , China River and Harbor Department, Nanjing Hydraulic Research Institute, Nanjing 210024 , China River and Harbor Department, Nanjing Hydraulic Research Institute, Nanjing 210024 , China |
| |
Abstract: | A 2-D mathematical model of tidal current and sediment has been developed for the Oujiang Estuary and the WenzhouBay. This model accomodates complicated features including multiple islands, existence of turbidity, and significant differ-ence in size distribution of bed material. The governing equations for non-uniform suspended load and bed load transport arepresented in a boundary-fitted orthogonal curvilinear coordinate system. The numerical solution procedures along with theirinitial conditions, boundary conditions, and movable boundary technique are presented. Strategies for computation of thecritical condition of deposition or erosion, sediment transport capacity, non-uniform bed load discharge, etc. are suggested.The model verification computation shows that, the tidal levels computed from the model are in good agreement with the fielddata at the 18 tidal gauge stations. The computed velocities and flow directions also agree well with the values measuredalong the totally 52 synchronously observed verticals distributed over 8 cross sections. The computed tidal water throughputsthrough the Huangda'ao cross section are close to the measured data. And the computed values of bed deformation fromYangfushan to the estuary outfall and in the outer-sea area are in good agreement with the data observed from 1986 to 1992.The changes of tidal volumes through the estuary, velocities in different channels and the bed form due to the influence of thereclamation project on the Wenzhou shoal are predicted by means of this model. |
| |
Keywords: | mathematical model tidal current non-uniform suspended load non-uniform bed load nan-equilibriumtransport bed deformation |
本文献已被 维普 万方数据 等数据库收录! |
|