Establish a multi-layered supervision system:

1. The design industry needs to work in accordance with regulations. The regulations must be rigorous and forward-looking. "If you think long-term, you will not worry about the near future";

2. Strengthen market supervision, not only to ensure the direction and sustainability of investment, but also to determine the responsibilities of insurance companies;

3. Formulate supporting laws and binding urban planning, and implement financial investment , set a timetable for construction and improvement, so that administrative accountability can be planned in accordance with the law and achieve practical results.

Adopt engineering measures:

Regulate river channels: adopt comprehensive measures such as excavation, expansion, and classification to renovate river channels;

Transform underground pipe networks: if appropriate, expand the pipe diameter , solve the problem of rainwater and sewage diversion;

Increase drainage facilities: such as building drainage tidal gates and drainage pumping stations;

Increase storage capacity: such as building reservoirs, regulating storage Lakes, etc.;

Increase permeability: such as laying permeable pavements, sunken green spaces, etc.;

Non-engineering measures:

Risk assessment of urban rainstorm waterlogging: such as Use RS, GIS, land use, DEM, etc. to build models to assess risks;

Appropriately increase design parameters: the value of the design return period of stormwater pipes should be increased;

Construction of urban flood control and disaster reduction policies and regulations: restrict and sanction economic and social activities that are not conducive to flood control and disaster reduction to achieve the goals of flood control and disaster reduction;

Establish an urban drainage project management mechanism: rationally adjust the expenditure and use structure of urban water conservancy funds , establish a capital investment mechanism with smooth channels and strict management;

Learn from foreign experience in preventing and controlling waterlogging: Japan and Germany are countries with very advanced technologies for controlling waterlogging and rainwater utilization, and we can learn from their experience and technology.

Establishing an urban drainage and flood prevention information system

In 2013, the country issued the "Notice of the General Office of the State Council on the Construction of Urban Drainage and Flood Prevention Facilities", requiring the active use of geographical information, Technology systems such as global positioning and remote sensing applications will be used to accelerate the establishment of a comprehensive information management platform with functions such as disaster monitoring, forecasting and warning, and risk assessment. [1]

The "Urban Drainage and Sewage Treatment Regulations" clearly state that it is necessary to establish a geographical information system for drainage facilities suitable for local conditions, and to apply modern geographical information and digital technology to daily operation management, risk control and emergency response . [1]

Urban management departments can use the information system to grasp rainfall intensity, rainfall distribution, rainfall amount and other information in real time, and obtain abnormal automatic alarm information and processing plans; to fully understand the operating status of the urban drainage pipeline system in real time, Intelligent supervision of pipeline drainage capacity and emergency repair sites.