The redesign adds an extensive retaining wall beside Liberty Square to solve the drainage problem initially requiring DOT to demolish several two-unit buildings in the complex, Mills said.

重新设计在自由广场的旁边增加了一个宽敞的挡土墙墙，以解决排水问题，最初要求交通部拆除几个两个单元的楼房，米尔斯说。

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The square gutter in- let should arrive at the drainage, meanwhile, it should be harmonious with the total style and the outstandings.

广场雨水口在达到排水目的的同时，还要与广场整体风格、环境协调一致。

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Currently the methods of design flow rate for domestic drainage which are popularly used in the world include square root method, experience method and probability method.

现行建筑内部给水、排水设计秒流量计算方法有平方根法、经验法和概率法等。

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"We could have perhaps helped to divert the water and put in sand bags to protect the cricket square and the drainage channels we have dug over the years on the rugby pitches, " he said.

BBC: Pitch inspection