The weather in Jiaozuo zhongzhan district

Heavy rain in Chongqing: taxis float in waist-high water, and urban waterlogging is caused by extreme weather, urban topography, aging drainage system and urban construction planning.

I. Extreme Weather Extreme weather occurred in Chongqing, with heavy rain to heavy rain in some areas. There are 16 rainfall stations in Banan, Qijiang, Fengdu, Kaizhou, Yunyang and Wansheng, reaching the rainstorm level. The maximum precipitation in Wansheng area is 87.3mm, and the maximum hourly precipitation in Banan coastal area is 64.4mm.. Second, it is not easy to form stagnant water in relatively high-lying areas of the city. Because Chongqing is a mountain city, water flows from high to low, and the upper part of Chongqing is relatively high, so there is no water accumulation. With the increase of rainfall, all the water flows to the lower half, so the place where water accumulates is usually in the lower half, which is a relatively low-lying place. Third, the drainage system is aging. In some cities of China, the drainage system is in debt, the pipes are aging and the drainage standard is low. Imperfect drainage facilities and backward drainage system construction in some areas are the main factors leading to urban waterlogging.

Four. Urban construction planning In cities, many hard pavements, such as asphalt roads and cement roads, have poor water permeability, are difficult to penetrate when it rains, and are easy to cause water accumulation. Ponds, lakes, cultivated land and other high permeability ground is a kind of? Natural reservoir? , can help rainwater penetrate into the ground, thus reducing the water on the ground. With the acceleration of urbanization, some natural water storage spaces such as rivers and lakes are filled and occupied, which objectively increases the pressure of urban flood control.

Some cities have not fully considered this point in their planning and construction. Some cities cut off natural drainage lines when building expressways, and only rely on culverts to connect roads, so where can the drainage flow? Line? Became? Point? , increasing the pressure of drainage and flood discharge.

In some areas, when designing low-lying areas, the problem of stagnant water was not considered, and the tunnel scheme was blindly adopted, which buried the hidden danger of waterlogging.