Netizens quarreled because Qingdao was occupied by Germany for a period of time, during which a large-scale drainage system was built. The only city that is not afraid of floods? The reputation, and this is also the intersection of common disputes.
Qingdao drainage system does have the shadow of German architecture, but it is very old.
When Germany occupied Qingdao, it did build an underground drainage system of 80 kilometers. When it was first built, the drainage system was really cash, with a large internal scale, and it also discharged rainwater and sewage separately.
But times have changed, and the occupation of Qingdao was in the last century. Now Qingdao has been expanded many times, and the total length of underground drainage system alone is 3000 kilometers, while the underground drainage system built in Germany in that year is now less than 2.66 kilometers.
The drainage system built in Germany is really effective at present.
It is worth mentioning that the drainage system built in Germany is still in service, and the effect is still very good, but it doesn't mean that we can't build it ourselves, just because the only remaining sewage pipeline is closest to the sea.
This 2.66-kilometer drainage pipeline is only a few hundred meters away from the sea, and rainwater can be quickly discharged into the sea through the pipeline, so as long as it is not a short period of heavy rainfall, this pipeline can be drained in time.
However, the discharge front of the remaining sewage discharge pipelines built in our country is very long. If there is heavy rainfall, they will definitely not be discharged. This has nothing to do with the amount of sewage discharged, because it is too far from the seaside?
The construction of sewage pipelines in Germany has left us a lot of experience.
Although many sewage pipes built in Germany were abandoned because of disrepair, they left us with rich experience.
Like rain and sewage diversion, it is a valuable experience left by German sewage discharge.
When Germany built sewage pipes in Europe, it discharged rainwater and sewage separately. The drainage pipe is divided into two parts, which are parallel underground and can discharge sewage quickly and in large quantities. In the early days, our sewage discharge mode was mainly mixed, which was easy to block. So I left us a lot of experience in German sewage disposal.
There are many low-lying places in Qingdao, and they are also afraid of heavy rainfall.
In fact, many places in Qingdao are below sea level, so it will be more difficult to drain rainwater in such places. Once there is a large-scale rainfall, it is prone to floods.
Qingdao is located in the temperate monsoon region, and there is usually no short-term heavy rainfall. Suddenly there was a typhoon, and the rainfall intensity was too high, which led to the flooding of the urban area. But what needs to be known is that this is not because the sewage discharge capacity is not strong, but because the pipeline is too long, tens of kilometers away, and the drainage speed is naturally much worse.
Warning signs were set up in low-lying areas.
During the German occupation, many bridge opening bridges were built. These areas are low-lying and easy to accumulate rainwater. Therefore, conspicuous signs will be placed in these places every rainy season, and special personnel will be appointed to deal with them in case of accidents.
Low-lying areas are particularly prone to floods, and there is nothing we can do about it. After all, if there is no typhoon, this kind of flood is really rare.