Where is the rainstorm in Qingdao concentrated? Why can't the sewers in Germany work?

According to the information released by the Meteorological Bureau, pingdu city is more serious.

Pingdu city Meteorological Bureau released the yellow rainstorm warning signal at 07: 15, August 365438, 2020. At present, the precipitation in some areas of pingdu city has exceeded 40 mm, and it is predicted that there will be more than 50 mm rainstorm in most areas of pingdu city during the day. Please take preventive measures.

Defense guide:

1 The government and relevant departments shall do a good job in rainstorm prevention according to their duties;

Traffic management departments take traffic control measures in heavy rainfall sections according to road conditions, and implement traffic guidance in waterlogged sections;

3 cut off the dangerous outdoor power supply in low-lying areas, suspend outdoor work in open air places, and transfer people in dangerous areas and residents of dangerous houses to safe places to avoid rain;

4 Check the drainage system of cities, farmland and fish ponds and take necessary drainage measures.

Netizens quarrel: What about artificial sewers in Germany? Is the drainage system built in Germany a hundred years ago so fragile? Isn't Qingdao the only city in China that is not afraid of floods? Have you run out of parts in the sewer oil bag? ?

It is true that Qingdao sewer was carefully built by Germans in those days. At that time, to build? Model colony? Germans really put a lot of thought into the design of urban drainage system.

At that time, the sewer pipe built by the Germans was about 80 kilometers long, and even cars could run at the widest point. In addition, they also adopted advanced rain and sewage diversion technology to divert the rain and sewage in the city with great foresight.

The main body of the pipeline is egg-shaped, which is wide at the top and narrow at the bottom. It is made of cement, and the lower layer is covered with ceramics, which makes the water flow faster and the soil is not easy to deposit.

So, the German sewer pipe is really very? Germany? . However, this is not the whole story.

Although the Germans built high-quality sewers for Qingdao, their fundamental purpose was not to benefit the people of China, but to reflect? Model colony? The superiority of. When the Germans occupied Qingdao, Qingdao was divided into westerners' zone and China's zone. Germans live in the western residential area in the city center, while China people can only live in the China residential area near Dabao Village. Although China people can enter and leave Qingdao, they are not allowed to buy land, build houses or live here.

So, the Germans posted it? Low and dirty? Chinese with negative labels, etc. , unable to enjoy the benefits of this underground pipeline.

Moreover, only 80 kilometers of drainage pipes were built during the German occupation period. Due to reasons such as extended service and urban planning, most of the pipe networks have been rebuilt and renovated one after another. At present, only about 2.66 kilometers of rainwater culverts and sewage pipes on Anhui Road and Daxue Road are still in normal use. The total length of the drainage pipe network in the third district of Qingdao is about 3000 kilometers, and the proportion of the pipe network repaired during the German occupation period is less than one thousandth, which has little impact on the entire drainage system in Qingdao.