海水入侵污水放流系统及其清除研究

研究海水入侵污水放流系统及其清除特性有助于系统优化设计和运行保护。运用水力学一般原理推导了清除流量和入侵临界流量的估算公式，并根据数学模型模拟结果讨论了部分系统参数对清除和入侵的影响，指出系统沿程阻力的增加及扩散器主管截面逐渐减小对减小清除流量作用不大，而立管在主管底部与主管联结与在顶部联结相比一般可减小清除流量10％以上。系统清除流量和人侵临界流量与立管个数成正比。还介绍了鸭嘴阀，文丘里喉管等几种限制入侵和帮助清除的技术措施。介绍的方法与结果可供工程实际应用。

Sea water intrusion and purging in sea outfalls

Equations are deduced in this paper to estimate the critical effluent discharge at which sea water would intrude into a sea outfall and the discharge to purge the sea water. Factors affecting intrusion and purging are discussed by numerical simulation. It is concluded that changes in friction and crosssection of the diffuser tunnel heve no significant effeca on purging,while invert connection is of obvious advantage for purging comparing with soffit-connection, and that the critical effiuent discharges relevant to intrusion and purging are essentially proportional to the number of risers. Measures to reduce intrusion and to help purging are also described.