Sight What to do if you encounter urban waterlogging .

The causes of urban waterlogging are as follows:

First, climate change has triggered changes in the water cycle. Due to the increase in urban population density, anthropogenic heat exhaust, air pollution and the heat island effect lead to further changes in the water cycle, which in turn leads to changes in the urban microclimate.

Second, the natural stagnation of the ground and the reduction of rainwater storage capacity caused by urban development and construction.

Third, the drainage capacity of drainage pipes and canals and other flood prevention facilities is insufficient.

Fourth, the human factor. long-term overexploitation of groundwater leading to land subsidence; Poor construction management causes construction waste or domestic waste to block pipelines; Pumping station failure; Landscape avenue renovation cover or manhole cover destruction.

Measures for waterlogging:

Conscientiously plan the construction of the urban drainage system. When building cities, it is necessary to seriously consider the construction of urban drainage systems in advance and strive to take precautions.

Continuous upgrading of the city's drainage system. The old urban drainage system was already difficult to cope with, so the drainage system in the old town had to be upgraded.

In addition to natural factors, there are also many human factors, such as the imperfection of urban underground drainage construction facilities, resulting in the failure to discharge excess rainwater in time, urban construction and destruction of rivers, resulting in narrowing of rivers and weakening of drainage capacity.

At present, some municipal departments have also done some early warning construction in response to the waterlogging situation, such as the construction of water accumulation monitoring in waterlogging areas.

Early warning, through information technology, the waterlogging situation is reported to the relevant command departments in a timely manner, and early warning is dispatched in a timely manner to reduce the losses of citizens.

The lag in the construction of drainage system is an important cause of urban waterlogging.

The consequence of rapid urbanization is that urban infrastructure is inadequate, and sewers do not fully account for prolonged, high-intensity heavy rainfall. The pipes are aging and the drainage standards are relatively low. In some places, the drainage facilities are not sound and imperfect, and the lag in the construction of the drainage system is an important cause of waterlogging.

In addition, a large number of hard pavements in the city, such as asphalt roads and cement pavement, have poor water permeability during rainfall, and are not easy to infiltrate, and it is easy to form water accumulation on this section of the road. In addition, the vegetation in the city is sparse and there are few ponds, which cannot store rainwater, resulting in the phenomenon of "catchment" and the formation of stagnant water. Moreover, the emergence of the heat island effect leads to an increase in the probability of heavy rainfall and the concentration of precipitation.

Urban waterlogging refers to the phenomenon of water accumulation in the city due to heavy precipitation or continuous precipitation exceeding the drainage capacity of the city.

severe waterlogging; The water storage capacity of the lake decreases, and the water level of the lake rises during the flood season, which is easy to break down and cause disasters. Reclamation has reduced the lake's storage capacity, resulting in frequent floods.

According to the description of the problem you provided: urban waterlogging refers to the flood disaster caused by the inability of the urban surface, underground and drainage systems to effectively eliminate precipitation. Waterlogging can lead to problems such as water accumulation on roads, flooding of low-lying areas, and flooding of basements.

The main causes of waterlogging include heavy rainfall, poor drainage systems, excessive surface cover, etc. When heavy rains hit, if the rainfall exceeds the carrying capacity of the city's drainage system, it can lead to water accumulation. In addition, the large number of buildings, roads, and concrete floors in cities can affect water infiltration and surface runoff, increasing the risk of waterlogging.

The effects of waterlogging include traffic jams, damage to living facilities, property damage and even people**. Traffic congestion is one of the most intuitive manifestations of waterlogging, and water accumulation on roads can affect vehicle traffic, cause traffic jams, and exacerbate urban chaos. In addition, low-lying areas often become the hardest hit areas by waterlogging, and residents' homes, shops, manuscripts and other facilities may be submerged, causing property damage.

In severe cases, waterlogging can also lead to people being trapped or injured or even killed. In order to deal with the problem of urban waterlogging, a series of measures can be taken. First of all, it is necessary to improve the drainage system of the city, increase the construction of drainage pipes and maintenance of drainage pipes, and ensure the smooth flow of the drainage system.

Secondly, urban planning should be strengthened, and the distribution of urban roads, green spaces and water bodies should be reasonably planned to reduce the obstruction of surface water flow by cover. In addition, rainwater harvesting and utilization, increasing green cover, and building flood storage areas can also be used to alleviate the problem of waterlogging.

Take Sicheng Town as an example:

1. Strengthen organization and leadership and improve flood prevention plans.

The party committee of Sicheng town attaches great importance to the flood prevention work, and promptly establishes a leading group for the town's flood prevention work, strengthens the leadership of the town's flood prevention work, and sets up a 30-50 flood prevention emergency team in 16 communities (villages) to improve the flood prevention plan at the town and village levels, clarify the division of labor and responsibilities of each department, and be familiar with and master the emergency plan.

2. Implement safety measures and do a good job in safety prevention.

Arrange personnel to dredge pipelines in a timely manner, eliminate potential safety hazards, and focus on cleaning up drainage ditches, sewers, and roof drains on both sides of roads and farmland to ensure smooth drainage. Implement special personnel on duty to quietly slag silver on duty in communities or parts that are prone to water accumulation or have been prone to water accumulation, and formulate countermeasures. At the same time, we will organize flood control materials such as excavators, shovels, and lighting tools to improve flood prevention and rescue capabilities and ensure the smooth development of flood prevention work.

3. Strengthen publicity and create an atmosphere for flood prevention.

Make full use of channels such as broadcasting, WeChat groups, and household visits to widely publicize the flood prevention situation and knowledge, raise the public's awareness of prevention, popularize disaster prevention and avoidance methods to all villages and households, and earnestly guide the masses on how to avoid disasters and save themselves. At the same time, we will strictly implement the flood control duty system, pay close attention to weather changes, and require town and village cadres to maintain 24-hour communication to ensure that the information notification of the plan is timely and efficient.

Through information technology, waterlogging can be monitored in flood-prone areas of cities.

Monitoring point, through the collected waterlogging data, remote transmission to the command platform, in the management center can be the first time to know, the specific location of waterlogging, time, type of brigade and the severity of waterlogging, at this time Bu Shengstool in the timely manual scheduling, improve emergency efficiency.

The reason for the formation of urban waterlogging is that the rainfall intensity is large, the rainstorm time is continuous, and the scope is relatively concentrated. In some areas, the drainage facilities are not healthy, the seepage is pure, complete, and the drainage is not smooth. Water may form in places where the rainfall is particularly rapid, and it may also form water accumulation when the rainfall is heavy and long.

Drainage strategies. The way out is nothing more than "infiltration, detention, storage, purification, use, and discharge" and their combinations. Such as:

renovation of urban drainage and flood prevention facilities; renovation of river and lake water systems and expansion of drainage outlets; The use of sunken green space, grass planting ditch, planting roof, artificial wetland and sunken square, sports field, parking lot and other sites to store and retain rainwater; The ground in the new area should have more than 40% permeable ground; construction of underground storage facilities; Rainwater is collected and simply treated for watering green spaces, washing cars and cleaning roads; rain and sewage diversion; drainage zoning; rainwater resource utilization, etc.

Topography. For example, although the old cities such as Suzhou and Wuxi are water towns, they are not easy to form water accumulation because the old cities choose relatively high terrain areas. The low-lying areas within the city are prone to waterlogging, and it is very important to choose what kind of topography and landform for urban construction land, if you choose low-lying land or flood detention area, the possibility of rainfall and water accumulation is very large.

The most direct situation is that the drainage pipe network system has failed to carry extreme rainfall, urban construction, narrowing of rivers, rising water levels, and so on.

To deal with the waterlogging situation, on the one hand, the construction of drainage facilities, and the construction of emergency teams, through information technology Internet of Things technology, can achieve remote real-time monitoring of waterlogging points.

In the event of waterlogging, early warning and evacuation should be carried out in time.