摘要
利用Delft3d模拟了鳌江口江南围垦工程对邻近海域的水动力影响,从工程前后的枯、洪水期的纳潮量、水位、流速过程及余流4个角度分析讨论围垦对该水域的泄洪及余流的影响。工程导致河口过水断面减小,①使深泓线涨落潮流速有着不同程度的增大;②洪峰影响时,河口水位壅高,低潮位上升显著,影响河水下泄,易引发内涝,并导致涨潮历时缩短、落潮历时延长;③余流受工程影响较大,工程使余流指向河口上游,余流值增大近一倍,而径流削弱了这种影响。④工程后,河口断面涨落潮潮量继续保持基本平衡,洪水影响时落潮潮量略大于涨潮潮量。
In this paper,the hydrodynamics of Aojiang estuary was modeled based on Delft3d. The reclamation influence was analyzed from tidal prism, tidal level, velocity and residual flow. The reclamation project lead to the decreasing of section area. It was pointed out that the flood and ebb velocity increased significantly. During the period of the river flood,the tidal level,especially the low tidal level rises,which affects the water discharge and results in the waterlogging. The duration of flood decreases, and the duration of ebb increases due to the river flood. The residual flow is directly affected by the reclamation. The residual flow points upstream,and the value nearly doubles. It is weakened by the discharging. The tidal volume of flood and ebb keeps the near balance. Ebb tidal volume is slightly higher than that of flood tidal during the river flood.
出处
《海洋通报》
CAS
CSCD
北大核心
2013年第5期559-567,共9页
Marine Science Bulletin
关键词
径流下泄
余流
围垦影响
鳌江口
discharging capacities
residual flow
effect of reclamation
Aojiang estuary
