摘要
海洋和大江(河)从整体上看蕴藏着较大的环境容量,特别离岸水体还没有得到合理利用。长江是我国第一大江,水深、流速大。常州市城市污水有条件地潜没、多孔排入长江不仅能解决常州市水环境问题,而且治理费用也将降低。本文分别用二维潮变流动方程、二维潮变扩散方程建立常州市城市污水排放江段流场、浓度场数学模型。在实测资料的基础上进行了流场计算;根据近、远期规划的污染物发生量。对COD浓度分布进行了预测,由模拟计算结果,得出城市污水排江方案是可行的结论。本文应用隐式破开算子法进行流场、浓度场数值计算。计算结果表明,该方法具有较好的稳定性和重现性。
The sea and great rivers as a whole contain huge environmental capacity. What is worth specifically mentioning is that the environmental capacity of offshore water body has not yet been fully developed, The Yangtze River is the first big river in China. Its big flow depth and swift current make the urban wastewater disposal of Changzhou City be favorable to have submerged wastewater discharge into the river so as to solve the water pollution problem of Changzhou with less expenditure. In this paper, the mathematical model for flow calculation has been established using 2-D horizontal time-varying flow equations. So has the mathematical model for COD distribution calculation using 2-D horizontal time-varying. diffusion equation. The flow into the nearby region of the discharge has been calculated on the basis of observed data, and COD distributions have been predicted according to the COD productions of long-term and shortterm plannings. The conclusion is that water quality of the Yangtze River will not be seriously affected, and the program of discharging sewage into the Yangtze River is feasible. Implicit fractional step solution is used for the calculation in this paper. The method has fairly good stability and accuracy.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
1992年第2期153-160,共8页
Journal of Tongji University:Natural Science
关键词
污水
流场
浓度场
破开算子法
处理
Submerged wastewater discharge in river
Flow field
Concentration field
Implicit fractional step
