在重力输水系统的规划设计中，有时采用无压管渠与压力管道相结合的方式输水。
In the planning and design of gravity water transfer system, the combined pattern of pressure free pipe and canal with pressured pipe line is sometimes adopted to carry out water transfer.
分析了补充水体的渗透地面、渗透管渠、渗透井和渗透池四种雨水渗透技术的优缺点。
It Analyses the merit and disadvantage of four rainwater infiltration technologies including infiltration ground, infiltration pipe and channel, filter pool and filter basin.
污水处理厂的进水水质还与污染物在管渠中的降解有关，因此本课题也研究分析了污水在管道与明渠中的降解情况，确定了相应的降解常数。
The wastewater quality is also related to the pollutant's degradation. Through analyzing the degradation in the trench and in the drainpipe, we get the degradation constant.
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