The heavy rainfall every summer can cause secondary disasters and even casualties in some areas.
However, as a common weather phenomenon, heavy rainfall will continue to exist in our daily lives for a long time. Then, what can the managers of our city do to better prevent problems in the future rains? What?
In Beijing on the evening of the 16th of this month, a heavy rainfall caused water to accumulate in many road sections, especially some of the culverts under the bridge, which caused serious water accumulation in a short period of time due to heavy rainfall.
Liu Jiahong, a senior engineer at the China Institute of Water Resources and Hydropower Research:
On the one hand, it is extreme short-term heavy rain. It is not a city-wide area. It may be concentrated in the bridge area, causing very fast water accumulation.
At present, the forecast of short-term heavy rainfall is still a worldwide problem.
But does this mean that we are helpless in dealing with short-term heavy rainfall?
According to Liu Jiahong, a senior engineer at the China Institute of Water Resources and Hydropower Research, after the "7.21" heavy rain disaster in Beijing in 2012, relevant parties have further optimized the "one bridge and one policy" plan for the 146 Xiacao districts in Beijing.
The method of digging and adjusting the reservoir to orderly alleviate the accumulation of water in the lower concave bridge area has been applied in many bridge areas.
However, due to the surrounding subway stations and other facilities, the site involved is subject to certain restrictions on the renovation of storage facilities.
The drainage pipe network of the surrounding communities will even discharge more water into the recessed bridge area.
So, how to solve the problem of urban waterlogging when drainage conditions are limited?
Liu Jiahong, a senior engineer at the China Institute of Water Resources and Hydropower Research:
Limited drainage conditions are historical debts in the process of urban development. This needs to be resolved in coordination with the surrounding areas.
(For example, the Xiacao area with insufficient conditions) Check whether the surrounding green areas have such conditions as underground storage tanks, and then build underground storage tanks in these surrounding areas to buffer part of the rainwater and avoid causing serious damage to the bridge area. Big momentary pressure.
Zhengzhou, Henan, which has just experienced the "July 20" torrential rain, has made many measures in advance when facing this round of torrential rain.
Zhengzhou Traffic Police's official WeChat counted 42 stagnant water spots in the city for reference for citizens to avoid danger.
In Ningbo, Zhejiang, in response to the typhoon "Fireworks" at the end of July, an electronic map of Sekisui with real-time data updates was launched urgently, allowing citizens to check the status of sekisui at key points in the city at any time.
Earlier in 2013, there was also a "segregated water map", jointly launched by flood control offices and traffic police at multiple locations, marking the degree of stagnant water in different colors.
So, will the stagnant water map be a weapon to deal with urban flooding?
Liu Jiahong, a senior engineer at the China Institute of Water Resources and Hydropower Research: The
stagnant water map is a very effective way to remind citizens of risks.
However, in order to ensure the validity, reliability and accuracy of the data, Sekisui Map needs a professional team. At the same time, it has strong real-time performance, but it does not have a forecast function. It has already accumulated water to upload the data to the platform. .
If we can combine the stagnant water map with the weather forecast, it should be more valuable for residents' travel and route planning.
In the opinion of experts, the emergency response of various government departments is crucial after the early warning information is released.
The rainstorm red warning is only an administrative guidance issued by the meteorological department, and it is not enforceable, and it is often too broad and general to the public to understand its connotation.
The weather warning only sounded an alarm. After that, various government departments need to quickly form a consultation and linkage mechanism, and activate their own specific emergency measures, in order to hold up an effective protection umbrella as soon as possible.
Wang Jiazhuo, Dean of the Ecological Municipal Institute of China Urban Planning and Design Institute:
All departments should have plans for disasters such as heavy rains, such as what should hospitals do, what should our communications, transportation, subway, and power departments do, if it happens Be able to respond in time to incidents.
At the same time, these departments should also interact with each other, and the emergency management department should play a role in the coordination of emergency management of such departments.