Abstract
With the rapid progress of urbanization, cities’ demands for traffic flood control are steadily on the increase, and people are gradually paying more attention to traffic safety and environmental issues. Considering the considerable convenience and service ability of liquid air and corresponding products, people have begun to switch to using liquid air as an emergency coolant. However, this air’s cryogenic operation and vigorous vaporization expansion restricts its widespread application. Our study explores innovative applications based on liquid air spray/evaporation icing and natural melting, which can be applied to urban flood protection. This study also includes a brief introduction to the nature of liquid air and road icing, a conceptual design based on liquid air flash evaporation (for urban flood protection), and the modeling and solving of natural road ice melting. This paper introduces many innovative key technologies, which include the rapid solidification of floods to form emergency ice dams or diversion channels and the application of liquid air spray to form icy roads for the temporary passage of small cars or pickup trucks. Additionally, the economic estimations are performed by using downtown traffic flood control in Wuhan as an example to showcase our innovative scheme for applying liquid air spray/vaporization for urban traffic flooding control, which is practical, pollution free, and cost effective. Our innovative scheme will be promising for flood control in modern cities.
Highlights
An urban flood may occur while the rainfall runoff exceeds the landscape’s absorptive capacity or the system may change to ensure its drainage effects cannot be sufficient [1]
The annual maximum discharge of rivers will increase with an increase in urban development, this growth will sometimes be covered by large changes during storm years, which are well marked in the annual maximum discharge of some large cities in China after 2000 [8]
Some innovative applications of liquid air spray for urban traffic flooding control are presented, including liquid air spray-based icing for the rapid formation of temporary ice roads for small cars or pickups, the rapid solidification of flood water for the production of emergent ice dams or diversion channels, the rapid diversion of rain clouds based on the vaporization of liquid air, and a technique for assembling open diversion channels
Summary
An urban flood may occur while the rainfall runoff exceeds the landscape’s absorptive capacity or the system may change to ensure its drainage effects cannot be sufficient [1]. Roads and buildings built in flood prone areas are facing increasingly more water hazards, including floods and erosion. There are many threats caused by floods, such as the destruction of property and endangering the lives of human beings and other species [16] Elsewhere, such as downstream or coastal areas, rapid water runoff can lead to soil erosion and associated sediment deposition. In Europe and America, coastal flooding threats have been eliminated through defensive measures such as seawalls, beach nutrition, and barrier islands An embankment is another method of flood prevention that reduces the risk of flooding compared to other methods. With the exception of the introduction and conclusions, the main body of this study is structured as follows: Section 2: Conceptual developments; Section 3: The innovation of the application of liquid air spray/vaporization for urban traffic flooding control; Section 4: The economic estimations of our urban traffic flooding control scheme based on liquid air spray/vaporization by using the downtown traffic flood control in Wuhan as an example
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