What is the geographical cause of the flood in Wuhan?

Recently, the rainstorm in Wuhan, Hubei Province caused a flood siege, which touched the hearts of the people all over the country. On the one hand, we gave full support to the disaster area, and at the same time, we thought about the characteristics of Wuhan's geographical environment from a geographical perspective to see what caused the floods in Wuhan. The flood in Wuhan, a geographical event, will definitely become the hot material for our geography exam. Let's think about it.

The geographical environment of Wuhan is that the terrain of Wuhan is high in the east and low in the west, high in the south and low in the north, and the middle is cut into three Y-shaped pieces by the Yangtze River and the Han River. There are nearly east-west banded hills in the south of Wuhan, surrounded by dense dendritic gullies, and nearly 100 lakes spread all over the country, forming a complex terrain with developed water system and mixed mountains and rivers. The highest altitude is about 150m and the lowest land altitude is about 18m.

Wuhan belongs to subtropical monsoon humid climate zone, with abundant rainfall and sunshine, four distinct seasons, high temperature in summer, concentrated precipitation and slightly cool and humid in winter.

Wuhan is one of the largest cities with the richest water resources in the world, and its water area accounts for nearly 1/4 of the city's total area, which constitutes a unique riverside and lakeside water ecological environment.

The total water area of Wuhan is 22 17.6 square kilometers, with a coverage rate of 26 10%, and the surface water per capita is1/4000 square meters, ranking first among major cities in the world. It is a megacity with the richest water resources in the world and the largest freshwater center in China. There are 0/65 rivers/kloc-over 5 kilometers in China, with a water surface area of 47 1.438+0 square kilometers.

Wu Hanyou 166 lakes, known as the "city of 100 lakes". At normal water level, the lake area is 803. 17 square kilometers, ranking first in China. Tangxun Lake is the largest urban lake in Asia (with an area of 47.6 square kilometers), and East Lake with an area of 33.9 square kilometers occupies the second place in the central city. Liangzi Lake is one of the two inland lakes with the best ecological protection in China. Wuhan Lake Records records the scenery of more than 0/00 lakes in Wuhan/KLOC. Wuhan's wetland resources rank among the top three inland cities in the world. By 20 10, the wetland area in Wuhan is 3,358.35 square kilometers, accounting for 39.54% of the city's land area, including natural wetland 156 1.86 square kilometers and artificial wetland 1796.49 square kilometers, enjoying the reputation of "wetland city".

What is the geographical cause of the flood in Wuhan? The geographical cause of the flood in Wuhan is related to Meiyu. At present, the rainfall in Wuhan is the largest, longest and widest plum rain this year, accompanied by strong convective weather such as thunderstorms and strong winds. In meteorology, Meiyu mainly refers to a period of continuous rainy weather with strong precipitation and frequent precipitation in the middle and lower reaches of the Yangtze River and Huaihe River Basin in early summer (from mid-June to late July). This period is called "Plum Rain" or "Huang Meiyu" because it is the mature period of Huangmei, a special product of Jiangnan. Because of the high temperature and humidity during this period, it provided an excellent hotbed for mold breeding, and clothes and utensils were prone to mildew, so it was also called "mildew rain". In this regard, Li Shizhen in the Ming Dynasty also recorded in the Compendium of Materia Medica: "Plum rain or mildew rain, said to be stained with clothes and things, are all black mold."

Statistics show that about one-third of the rainstorm and rainstorm days in Meiyu area occur in Meiyu period. Meiyu generally accounts for 20% ~ 30% of the annual rainfall, and sometimes even reaches 50%. The rising period of river water level caused by precipitation in Meiyu period is Meiyu period. This is the main flood season in the Yangtze River basin and Huaihe River basin in China, and it is the period with the largest flow in a year. Historically, most of the major floods in the Yangtze River and Huaihe River basins occurred during the Meiyu period.

The above content is an introduction to the geographical causes and related geographical environment of the flood in Wuhan. Students should learn to find geographical information related to our exams from current events and make reasonable answers based on what we have learned. This is the key to learning geography.