Effective measures to prevent and control urban waterlogging

The effective measures to prevent urban waterlogging are as follows: First, cities should do a good job in flood control and waterlogging prevention planning, promote the construction of sponge cities, increase emergency flood storage measures, build urban flood disaster prevention and management systems, and strengthen the construction and management of drainage pipe networks.

1 first of all, cities should make good plans for flood control and waterlogging prevention.

The data of urban topography, underlying surface, drainage pipe network, river hydrological data and meteorology should be collected, and a mathematical model should be constructed to evaluate the drainage capacity and waterlogging risk of urban drainage system. Urban waterlogging risk levels should be divided into waterlogging safety zone, light danger zone, medium danger zone and high danger zone.

Medium and high risk areas should avoid underground garages, underground shopping malls, underground station exits and other facilities or take special protective measures. Urban emergency management departments should formulate evacuation routes and means for people from low-risk areas to high-risk areas when floods occur.

2. Promote the construction of sponge cities.

Urban development makes the underlying surface of farmland, wasteland, depression, reservoir, etc., which used to seep or store water, become the impervious underlying surface of building roof, asphalt pavement, etc., which greatly increases the urban flood flow and peak flow and increases the risk of waterlogging. Promote the construction of sponge city and adopt a series of measures of infiltration, storage and drainage to minimize the impact of urban construction on the underlying surface.

3. Increase emergency measures for urban flood control.

School playgrounds, urban parks, green spaces, outdoor football fields and other facilities are designed to be lower than the ground for temporary storage of urban floods, which will be pumped to the drainage pipe network by pumps after the floods.

4. Urban flood control management system should be established.

Before it rains, the meteorological department will make a forecast, and it will fall to the ground to form surface runoff, which will take some time to converge to a certain depth. It is necessary to use this time to do a good job in real-time rainfall monitoring and disaster prevention prediction and alarm. Urban meteorological departments, hydrological departments, emergency management departments and operating departments of important public facilities such as schools, subway stations and large shopping malls shall establish information sharing and coordination command systems. Departments at all levels should formulate emergency plans for flood control and waterlogging prevention, and there should be a coordination mechanism in the plans.

5, should strengthen the construction and management of drainage pipe network.

Study the return period of rainwater pipe network, and whether the design return period can be adjusted and appropriately increased. Or according to the classification of urban waterlogging risk levels in urban flood control and waterlogging prevention planning, different standards are applicable. Strengthen the daily management of urban drainage pipe network to ensure that rainwater outlets, inspection wells and drainage pipes are not blocked and can function normally at critical moments.