Abstract
Beijing is located on the North China Plain with five rivers, which belong to the Hai River Basin. Its continental monsoon climate with uneven precipitation distribution is extreme likely lead to serious urban flood disasters. According to the disaster results, urban storm flood in Beijing can be classified into four types. Here typical extreme storm flood events and their characteristics in Beijing were analyzed in detail. It showed that storm flood events in recently decades had a trend, which centered in a relatively small area with high intensity and short duration. The main reasons of urban storm flood disaster were urbanization and basic facilities with low flood and drainage standard. Urbanization means land utilization significantly altering hydraulic processes, and extreme storm can easily exceed those facilities capacity. In order to deal with urban storm flood, Beijing government have taken four measurements, which were upgrading and reconstruction of rainwater pumping stations, improving projects of small and medium rivers, building sponge city, and implementing the West Suburb Storm-water Regulation Project. In addition, the flood warning and emergency management system has been established. Furthermore, some measurements were pointed to be done in the future, including improvement of the flood control management system, improvement of flood control plans, strengthening flood warning system, and strengthening social management and public awareness of flood prevention. With these improvements of management and engineering measurements, it can be more secure under intensive storms in Beijing. These experiences of flood control in Beijing can provide references for other cities.
Highlights
Beijing is located on the northwest end of the North China Plain
Five rivers flows through Beijing, and they are all parts of the Hai River Basin
In order to drain the flood in the central urban means that, the flood from the upper and middle region districts as quickly as possible, water bodies such as of the city are led through creeks into the North Canal. inner-city rivers or lakes are used for storage, and Diversion to the south means that when the south moat is facilities such as water gates or dams are used for under full capacity, the rubber dam is filled and the sluice controlling[1]
Summary
Beijing is located on the northwest end of the North China Plain. The terrain inclines towards the northwest. In order to drain the flood in the central urban means that, the flood from the upper and middle region districts as quickly as possible, water bodies such as of the city are led through creeks into the North Canal. Reservoirs and big rivers, including piping, cracks, dam (2) In the recent decade, the storms in Beijing region collapse, superflux, breach, inrush, river rise and other have been showing new patterns. The storm of this kind risks of important flood control facilities; 3) water is created by one single small-scale cumulonimbus cloud logging in the outskirts and related secondary disasters; 4) or a rain cell, and concentrates on a small area.
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