He says one problem is people leaving wastes and other objects in drainage channels.

他表示，其中一个问题就是人们向下水道中丢弃垃圾和其他物体。

These were fitted with sensors to measure things such as temperature, flexing and the flow of water through the drainage channels.

这些节段都配有传感器以测量温度、弯曲程度以及通过排水管道的水流。

No. Really they just need to find the money for something to replace the drainage channels, in order to protect against flooding now.

是的。他们现在只需要寻找资本来代替抽水水渠，以防洪涝灾害。

So they built the drainage channels too close to sea level, and now sea levels are rising, they're more or less useless.

所以他们建造的排水水渠离海平面太近了，现在海平面在上升，他们或多或少地失去了作用。