| Author: | Mak, Tai-wing |
| Title: | 3-D simulation of hydrodynamics and sediment transport in the Pearl River estuary |
| Other Title: | Three-D simulation of hydrodynamics and sediment transport in the Pearl River estuary |
| Degree: | M.Sc. |
| Year: | 1997 |
| Subject: | Sediment transport -- China -- Pearl River Hydrodynamics Hong Kong Polytechnic University -- Dissertations |
| Department: | Multi-disciplinary Studies |
| Pages: | v, 55, [147] p. : ill. ; 30 cm |
| Language: | English |
| Abstract: | A 3D finite element computer model, is used to investigate the transport of the suspended sediment subjected to the tidal current, Coriolis force and water density in the Pearl River Estuary. For understanding the behaviour of the suspended sediment transport, it is necessary to have more information about the sediment concentration and current movement in water column. The sediment concentration in the Pearl River Estuary depends on the discharge from rivers and ocean. Many factors such as tides and water density may change the current movement in the estuary. The water density is varied with pressure, salinity and water temperature. However the pressure can be neglected in shallow coastal area. Sea water temperature can be calculated by the Joint Panel on Oceanographic tables and standards (UNESCO 1981). The sea temperature can be gained or lost by vertical energy transfer between sea surface and air. The vertical energy transfer can be described by the net upward or downward surface heat flux. For obtaining the net surface heat flux, a computer program is written and a set of data obtained from H.K. Royal Observatory among 1990 and 1994 is chosen for this computer simulation. Finally, the data between 3/11/1993 and 5/11/1993 are used. The maximum heat flux escaping from sea to air is approximately 700 W/m2. By calculation, the temperature lost from sea to air is insignificant and the heat exchange factor can be neglected. Thus uniform sea temperature is used for the water column. The initial salinity follows the suggestion of Ridley & Thomas (1985). The simulation results of the surface current and suspended sediment flux affected by salinity and Coriolis force are analysed. The movement of the surface current is found in general agreeing with the previous documented investigations. The suspended sediment fluxes moves in and out the estuary through Macau and western Lantau Island and this causes the surface water is brown colour. |
| Rights: | All rights reserved |
| Access: | restricted access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| b14211543.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 5.49 MB | Adobe PDF | View/Open |
Copyright Undertaking
As a bona fide Library user, I declare that:
- I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
- I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
- I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.
By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.
Please use this identifier to cite or link to this item:
https://theses.lib.polyu.edu.hk/handle/200/2561