【作者】 孙波；

【导师】 韩乃斌；

【作者基本信息】 南京水利科学研究院 ， 水力学及河流动力学， 2002， 硕士

【摘要】 本文总结了对疏浚弃土运动研究的发展现状，在了解疏浚弃土近程扩散与输移的运动特征后，用物理方程对其运动过程进行了理论描述，并在此基础上建立数学模型。 通过求解对流沉降控制方程组和动力耗散控制方程组，可得出泥沙云团在尚未落淤于底面之前，不同历时的空间位置和其他物理量。再利用紊动扩散理论对受水流条件支配的泥沙运动进行模拟。 本文所建立的数学模型对大连港黄白咀疏浚物倾废区的现场抛泥过程进行了模拟，取得了较为满意的成果。本模型的运用可为疏浚施工提供依据，并为疏浚弃土的长期扩散计算提供初始条件。更多还原

【Abstract】 In the present paper, a brief introduction to the movement of the dredged materials has been made. Based on the character of the movement, the governing equations to confine the movement are discussed, and a numerical model for computing water column concentrations and bottom deposition resulting from a dredged material disposal operation has been developed.Given a set of initial conditions, the governing equations on convective descent phase and dynamic collapse phase of the disposal cloud can be solved to yield the location and other physical characters of the cloud in different time history. Then the transportation and diffuseness of the material governed by the ambient current is simulated by using the turbulence diffusion equations.Results from model simulation on the Huangbaizui disposal site near the Dalian Harbor have been presented. From inspecting the results, the model can be used to predict the fate of dredged material in near field, and to afford the initial condition for computing the long-term fate of the dredged material.更多还原