| 潮流波浪联合输沙及海床冲淤演变的理论体系与其数学模拟 |
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| 引用本文： | 白玉川,顾元棪,蒋昌波.潮流波浪联合输沙及海床冲淤演变的理论体系与其数学模拟[J].海洋与湖沼,2000,31(2):186-196. |
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| 作者姓名： | 白玉川 顾元棪 蒋昌波 |
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| 作者单位： | 天津大学河流海岸工程泥沙研究室,天津,300072 |
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| 基金项目： | 国家自然科学基金!59809006，天津市21世纪青年基金!983702011，华东师范大学河口海岸国家重点实验室开发基金!9 |
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| 摘 要： | 根据近岸带及河口区潮流、波浪、湍流各自物理尺度的不同，从Ｎａｖｉｅｒ－Ｓｔｏｋｅｓ方程和质量传输方程出发，利用Ｒｅｙｎｏｌｄｓ分解的方法，建立了模拟波浪 流联合输沙及海床冲淤演变的理论体系，给出了潮流作用下近岸波浪传播方程、波浪作用下潮流运动方程并通过利用波流合成底部切应力、底层湍流脉动随机特性，得出了波流联合作用下不平衡沙计算中泥沙起悬与沉降量的确定方法。本文模型应用于“广西合浦围垦工程潮流波浪
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| 关 键 词： | 潮流 波浪 联合输沙 海床冲淤 理论体系 |
| 收稿时间： | 1998/10/15 0:00:00 |
| 修稿时间： | 1999/9/10 0:00:00 |
THEORETICAL SYSTEM OF SEDIMENT TRANSPORT BY COMBINED TIDAL CURRENTS AND WAVES AND MATHEMATICAL MODEL OF SEA BED ACCRETION AND EROSION |
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| BAI Yu-chuan,GU Yuan-yan and JIANG Chang-bo.THEORETICAL SYSTEM OF SEDIMENT TRANSPORT BY COMBINED TIDAL CURRENTS AND WAVES AND MATHEMATICAL MODEL OF SEA BED ACCRETION AND EROSION[J].Oceanologia Et Limnologia Sinica,2000,31(2):186-196. |
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| Authors: | BAI Yu-chuan GU Yuan-yan and JIANG Chang-bo |
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| Institution: | Institute of Sedimentation on River and Coast Engineering, Tianjin University, Tianjin, 300072;Institute of Sedimentation on River and Coast Engineering, Tianjin University, Tianjin, 300072;Institute of Sedimentation on River and Coast Engineering, Tianjin University, Tianjin, 300072 |
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| Abstract: | According to the differences among physical scales about tide current wave and turbulence in nearshore zone and estuary, from Navier-Stokes equations and transport equation in fluid mechanics, the flow field and sediment diffusion equations are deduced by using Reynolds decomposition method, a theoretical system of sediment transport by combined wave-tide current and sea bed evolution due to sadiment accretion and erosion is proposed. Controlling equations include: 1) tide current equations under the effecting of waves; 2)wave propagation equations under the effecting of variance of tide level and velocity; 3)sediment diffusion equations transposed by waves and tide current 4)sea bed evolution equations; 5)through composing the shears stress of wave-current and considering the random characters of pulsation and coherent structure in near sea bed turbulence, the quantities function of suspended sediment picked up from and deposited on the bed are determined on the basis of the probability and statistics method. As a practical application, this nonequilibrium sediment mathematical model was used to Engineering of Enclosing Tide Land for Cultivation in Hepu District in Guangxi Zhang Autonomous Region and Wave-Tide Cureent Combined Calculation in Huanghua Harbour in Hebei Province. The obtained results are satisfactory. |
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| Keywords: | Sediment transport by combined wave and tide current Nonequilibrium sediment Sea bed evolution |
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