城市雨水流量是城市雨水排除管道设计的基础和依据，其标准按《室外排水设计规范》（GBJ14-87）执行；
The city rain flux is the design foundation of city rain drainage pipeline, the standard according to outdoors drainage criterion (GBJ14-87).
平屋顶可以为完全水平，也可以(这样更好)具有一定程度的坡度，以便雨水或融雪得以排除。
Flat roofs may either be dead level or (preferably) have some degree of pitch to them so that rainwater and melted snow can drain away.
就像是一个活的有机体，穹顶下受保护的环境也需要接收新鲜的水供人们使用、雨水用于灌溉和排除废水。
Like a live organism, the protected environment under the Dome needs to receive fresh water for human consumption, rainwater for irrigation and rejects wastewater.
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