摘要
采用Delft3D二维数学模型模拟鄱阳湖入江水道水流,结合港区3座码头涉河建设方案,合理进行矩形网格划分,利用实测的上游五河来水及下游湖口站水位资料进行率定和验证,确定模拟河段糙率系数和涡黏系数。选用2种边界条件,计算码头建设前后水位和流速变化数值,经过数据处理,形成工程建设前后水位和流速差值等值线图,得出港区3座码头最大壅水高度为0.95 cm,流速增加最大值为0.17 m/s,即工程建设对鄱阳湖入江水道壅水和流速影响均不大。这表明Delft3D可定量分析新建码头对鄱阳湖入江水道壅水和行洪能力的影响,为得到合理的防洪评价结论提供有力的技术支撑。
Using the Delft3D two-dimensional mathematical model to simulate the water flow in the Poyang Lake inflow channel,combined with the construction plans of three docks in the port area,a reasonable rectangular grid division was carried out.The measured water level data from the upstream five rivers and the downstream Hukou station were used for calibration and verification to determine the roughness coefficient and eddy viscosity coefficient of the simulated river section.Two boundary conditions were selected to calculate the changes in water level and flow velocity before and after dock construction.After data processing,an contour map of the difference in water level and flow velocity before and after engineering construction was formed.The maximum height of the three docks in the port area was 0.95 cm,and the maximum increase in flow velocity was 0.17 m/s.The engineering construction had little impact on the backwater and flow velocity of the Poyang Lake inflow channel.Therefore,Delft3D can quantitatively analyze the impact of newly constructed docks on the blocking and flood discharge capacity of the Poyang Lake inflow channel,providing strong technical support for obtaining reasonable flood control evaluation conclusions.
作者
陈兴
CHEN Xing(Jiangxi Jiujiang Water Conservancy Technology Application Center,Jiujiang 332001,China)
出处
《南昌工程学院学报》
CAS
2024年第4期28-34,共7页
Journal of Nanchang Institute of Technology
关键词
防洪评价
Delft3D
差值等值线图
鄱阳入江水道
flood control impact assessment
Delft3D
difference contour map
Poyang Lake inflow channel
作者简介
陈兴(1989-),男,硕士,工程师,317957131@qq.com.
