A study on sedimentation of tidal rivers and channels flowing into deep bay with a Delft3D model

A study on sedimentation of tidal rivers and channels flowing into deep bay with a Delft3D model

Wang, Z.B.
Tse, M.L.
Lau, S.C.

Civil Engineering and Geosciences

Hydraulic Engineering

2011-12-31

For supporting Drainage Services Department of the Government of the Hong Kong SAR to develop a comprehensive strategy for overall land drainage and flood control in Yuen Long and North Districts, 3D hydrodynamic and sediment transport model is set up. The model deploys Domain Decomposition technique and covers the whole Deep Bay (the estuary of the Shenzhen River), the tidal sections of the rivers and drainage channels including Shenzhen River, Kam Tin River, Shan Pui River and Tin Shui Wai Main Drainage Channel flowing into Deep Bay and a part of the Pearl Estuary. As driving forces, the model takes into account waves and flow driven by wind, tide, river discharge and salt intrusion. Field surveys for wind waves, sediment concentration and especially sediment properties have been conducted. The collected data are analysed together with the existing data and used as basis for the set up of the model. The model is calibrated especially against the development of sedimentation in the Lower Shenzhen River since 2000, after a major deepening of the river. The model can be applied to predict sedimentation in Shenzhen River and tidal drainage channels for different scenarios concerning dredging strategy and river discharge regimes. The study has improved insights into the complicated hydrodynamic and morphodynamic system of Deep Bay together with the rivers and channels flowing into it.

http://resolver.tudelft.nl/uuid:3ae31f05-b4ef-4a7e-bf2b-ecb0bc782e66

Proceedings of the 6th international conference on Asian and Pacific Coasts, APAC, Dec. 2011, Hong Kong

Institutional Repository

conference paper

(c) 2011 Wang, Z.B., Tse, M.L., Lau, S.C.