波流联合作用下广东阳西电厂海域二维泥沙数值模拟研究
|
摘要
建立波流联合作用下平面二维泥沙数学模型,在对模型进行充分验证的基础上,对广东阳西电厂工程海区的潮流泥沙进行了数值模拟,对潮流场泥沙场特征进行了分析,计算了工程附近海域冲淤变化及暴风骤淤特征。研究结果表明;工程方案实施后,流态变化比较大的区域主要是取排水口附近、防波堤两侧以及防波堤东侧水域。排水口处流速明显增大,增幅可达167%;取水口东侧、南侧均为泥沙淤积区,取水口附近年冲淤厚度范围为0.1～0.2 m/a;加长码头防波堤后,堤头东侧水域则会有所冲刷,最大冲刷为0.2 m/a左右;台风作用下,海域含沙量明显增大,造成港池和取水口的较强淤积,取水口东南侧均为泥沙淤积区,取水口附近淤积厚度为0.20～0.25 m;加长码头防波堤后,堤头东侧会有所冲刷,最大冲刷可达0.5 m。
A two-dimensional mathematical model for suspended sediment transport is established under combined waves and currents. On the basis of full verification of the model, the tidal current and sediment in the sea area of Yangxi Power Station in Guangdong Province are numerically simulated, the characteristics of tidal current field and sediment field are analyzed, and the change of erosion and deposition in the vicinity of the sea engineering area as well as sudden siltation after storm are calculated. The results show that after the implementation of the engineering project, there is a relatively large flow pattern change around the intake and drainage outlet, both sides of the breakwater as well as the east side of the breakwater. The velocity in the area around the drainage outlet increases evidently, increasing by 167%. The east side and the south side of the intake are siltation area and the annual thickness of the siltation is 0.1 m/a to 0.2 m/a. After the breakwater is lengthened, the area on the east side of the dike will erode, the maximum thickness of the erosion is around 0.2 m/a. Under the effect of the typhoon, the sediment concentration in the sea area increases obviously, resulting in a strong siltation in the harbor basin and around the water intake, especially the southeastern side of the intake, and thickness of the siltation is 0.20 to 0.25 m around the water intake. The area on the east side of the breakwater head will erode after the breakwater is lengthened, and the maximum thickness of the erosion can reach 0.5 m.
A two-dimensional mathematical model for suspended sediment transport is established under combined waves and currents. On the basis of full verification of the model, the tidal current and sediment in the sea area of Yangxi Power Station in Guangdong Province are numerically simulated, the characteristics of tidal current field and sediment field are analyzed, and the change of erosion and deposition in the vicinity of the sea engineering area as well as sudden siltation after storm are calculated. The results show that after the implementation of the engineering project, there is a relatively large flow pattern change around the intake and drainage outlet, both sides of the breakwater as well as the east side of the breakwater. The velocity in the area around the drainage outlet increases evidently, increasing by 167%. The east side and the south side of the intake are siltation area and the annual thickness of the siltation is 0.1 m/a to 0.2 m/a. After the breakwater is lengthened, the area on the east side of the dike will erode, the maximum thickness of the erosion is around 0.2 m/a. Under the effect of the typhoon, the sediment concentration in the sea area increases obviously, resulting in a strong siltation in the harbor basin and around the water intake, especially the southeastern side of the intake, and thickness of the siltation is 0.20 to 0.25 m around the water intake. The area on the east side of the breakwater head will erode after the breakwater is lengthened, and the maximum thickness of the erosion can reach 0.5 m.
引文
[1] Burchard H.Hybridization between s-and z-coordinates for improving the internal pressure gradient calculation in marine models with steep bottom slopes[J]. International Journal for Numerical Methods in Fluids,1997,25(9):1 003-1 023.
[2] Wang K H. Characterization on circulation and salinity change in Galvest on Bay[J]. Engrg. Mech., 1994,120(3):557-579.
[3] Kim C, Lee J. A three-dim ensional PC-based hydrodynamic model using an ADI scheme [J].Coastal Engineering, 1994,23:271-287.
[4] 徐照明,马强,蒋磊.深圳湾泥沙淤积预测及其影响研究[J].水利水电技术,2015,46(2):96-100.
[5] 李孟国.海岸河口泥沙数学模型研究进展[J].海洋工程,2006,(1):139-154.
[6] 远航,于定勇.潮流与泥沙数值模拟回顾及进展[J].海洋科学进展,2004,(1):97-106.
[7] 张心凤,李越.银湖湾A区围垦规划潮流泥沙数值模拟研究[J].中国农村水利水电,2014,(8):62-66,72.
[8] 陈淑青.取水工程对港内水流条件及泥沙回淤的影响[J].水运工程,2018,(1):93-99.
[9] 李大鸣,阳婷,李杨杨,等.潮流泥沙数学模型在青岛港挡沙堤工程的应用[J].海洋通报,2016,35(1):103-111.
[10] 许婷,严冰,韩志远,等.秦皇岛市莲花岛工程潮流泥沙数值模拟研究[J].水道港口,2015,36(6):502-509.
[11] 李大鸣,欧阳锡钰,潘番,等.考虑波浪辐射应力的潮流泥沙数学模型[J].海洋通报,2014,33(6):703-711.
[12] 何用,高时友,徐峰俊,等.珠江口潮流泥沙数学模型关键问题探讨[J].泥沙研究,2014,(4):60-66.
[2] Wang K H. Characterization on circulation and salinity change in Galvest on Bay[J]. Engrg. Mech., 1994,120(3):557-579.
[3] Kim C, Lee J. A three-dim ensional PC-based hydrodynamic model using an ADI scheme [J].Coastal Engineering, 1994,23:271-287.
[4] 徐照明,马强,蒋磊.深圳湾泥沙淤积预测及其影响研究[J].水利水电技术,2015,46(2):96-100.
[5] 李孟国.海岸河口泥沙数学模型研究进展[J].海洋工程,2006,(1):139-154.
[6] 远航,于定勇.潮流与泥沙数值模拟回顾及进展[J].海洋科学进展,2004,(1):97-106.
[7] 张心凤,李越.银湖湾A区围垦规划潮流泥沙数值模拟研究[J].中国农村水利水电,2014,(8):62-66,72.
[8] 陈淑青.取水工程对港内水流条件及泥沙回淤的影响[J].水运工程,2018,(1):93-99.
[9] 李大鸣,阳婷,李杨杨,等.潮流泥沙数学模型在青岛港挡沙堤工程的应用[J].海洋通报,2016,35(1):103-111.
[10] 许婷,严冰,韩志远,等.秦皇岛市莲花岛工程潮流泥沙数值模拟研究[J].水道港口,2015,36(6):502-509.
[11] 李大鸣,欧阳锡钰,潘番,等.考虑波浪辐射应力的潮流泥沙数学模型[J].海洋通报,2014,33(6):703-711.
[12] 何用,高时友,徐峰俊,等.珠江口潮流泥沙数学模型关键问题探讨[J].泥沙研究,2014,(4):60-66.