Abstract
In recent years, "see the sea" in the rainy season has become a high frequency event in cities. Urban flood and waterlogging which are increasing day by day has influenced residents' lives seriously especially in large cities with high population aggregation. As a coastal city with low altitude, Shenzhen, where has a high requirement for the urban drainage system, not only has to face abundant in rainfall but also has to cope with the tide. In this paper, the disaster reduction systems such as rainwater collection, drainage system, flood storage and detention basin, reservoirs and pumping station in the Shenzhen River basin are analyzed and the operation effect is studied. In general, the flood management system of overall planning, emergency scheduling, preparation before flood, key area on duty, and post-rain response has achieved a high level and played an active role in disaster prevention and reduction. The conclusions that Shenzhen River basin has a complete and efficient system of urban flood and waterlogging management, the rainwater collecting and discharging system can meet the requirement of the city and modern design concepts of blocking, storaging, draining, pumping, scheduling which have effectively reduced the disaster have been come.
Highlights
With the development of domestic cities, they are changed that the degree of urbanization has gradually increased, the population has been concentrated in cities, the urban area has become larger and larger, and resources such as rivers, lakes and water pools with accumulated water and flood control functions have been crowded and the natural ground that can seep water gradually becomes a cement floor that is impervious to water
The drainage system of the Shenzhen River basin consists of pipeline, reservoir, flood storage and detention basin, pumping station, emergency scheduling and river to complete the flood control
The urban flooding projects are modern that reflects the characteristics of smart management
Summary
With the development of domestic cities, they are changed that the degree of urbanization has gradually increased, the population has been concentrated in cities, the urban area has become larger and larger, and resources such as rivers, lakes and water pools with accumulated water and flood control functions have been crowded and the natural ground that can seep water gradually becomes a cement floor that is impervious to water. As a frontier of reform and opening up, Shenzhen which has a subtropical maritime climate with abundant rainfall and rainy seasons has a resident population of 12.52 million expanded rapidly in the short term. It is a rainy season from April to September every year. The city has a low altitude and small fall head that makes the rainwater is difficult to discharge (Zhang Li-hong, 2017) It is the focus of municipal waterworks that how to find the method to match the municipal flood control facilities and the climate of heavy rainfall in the coastal areas
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