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本文扼要介绍了长江口污水排放的物理模型试验和数学模型计算。为潮汐河口的水环境研究提供了经验。迳流和潮差是影响污水稀释扩散效果的主要因素。在枯季小潮期间小于100倍稀释倍数的污染面积最大,而在一个全潮周期中,憩流时的扩散效果最差。由于往复水流的存在使得浓度物质在扩散过程中相互叠加。还介绍了物理模型试验中的主要仪器设备、基本试验方法以及一维和二维数值计算。并将模型试验、数值计算成果与现场观测资料作比较,其结果是一致的。
This article briefly introduced the Yangtze River Estuary sewage discharge physical model test and mathematical model calculation. It provides experience for the study of water environment in tidal estuaries. Rift and tide is the main factor that affects the dilution effect of sewage. In the dry season less than 100 times the dilution of the dilution of the largest area of pollution, and in a full tide cycle, the easiest to spread when the flow of the worst. Due to the presence of reciprocating water flow, the concentration substances are superposed on each other during the diffusion process. Also introduced the physical model test in the main equipment, basic test methods and one-dimensional and two-dimensional numerical calculation. The results of model test, numerical calculation and field observation are compared.