Which plate is Suzhou?

Suzhou is an ancient historical city and one of the first national cultural cities and scenic tourist cities announced by the State Council. Located in the eastern part of Taihu Plain in the Yangtze River Delta, it borders Shanghai in the east and the East China Sea and Zhejiang in the south. Wuxi in the west and the Yangtze River in the north. The administrative area governs Suzhou, Changshu, Taicang, Kunshan, Wujiang, Zhangjiagang and other cities (counties), and the geographical coordinates are: 30o46' north latitude (south of Zhenjiang Town, Wujiang) ~32o02' (Jiang Xindao, Zhangjiagang), and120o1kloc-0/east longitude. The total area of the city is 8488.42 square kilometers, including 4660 square kilometers of plains, 3607 square kilometers of water surface and 22 1 square kilometers of hills, accounting for 54.9%, 42.5% and 2.6% of the total area respectively. 1998, the city's total population reached 5,853,500, including urban/kloc-0,072,500. The gross national product has increased steadily year by year. It is the fifth city with sustainable development potential in China and one of the economically and culturally developed cities in China.

According to the principles of comprehensiveness, heredity and serving agricultural production, Suzhou's natural comprehensive zoning belongs to two provincial-level natural geographical areas, namely, Yangtze River Delta Plain and Taihu Plain, and four secondary natural areas, namely, Yangtze River Shazhou Area, Suzhou-Wuxi Plain, Taihu Lake and Lakeside Hilly Area and Yangcheng-Dianba Lowland.

Suzhou is located in the humid monsoon climate zone on the southern edge of the northern subtropical zone, with warm, humid and rainy seasons, long winter and summer, and short spring and autumn. The daily accumulated temperature ≥ 10℃ is 499 1.9℃, the annual average temperature is 15.7℃, the average temperature in June is 1℃, and the extreme minimum temperature is 9.8℃. The average temperature in July is 28.2℃, the average maximum temperature is 32 ~ 33℃, and the extreme maximum temperature can reach 38 ~ 40℃. The frost-free period is about 233 days, the average first frost period is1165438+20, and the average last frost period is from March 20th to March 25th in the west and from March 25th to March 3rd1in the east. When the disastrous weather is severe in this area, there will be low-temperature freezing injury, such as 1958 10, and the minimum temperature drops to -9.8℃ in early October. The high temperature and drought in midsummer can last for 20 ~ 30 days, such as1August 30th, 986, when the temperature reached 36.6%, and1July 30th, 987, the high temperature above 37℃ lasted for more than 20 days, which caused the summer drought.

There is abundant rainfall, the precipitation is about 1063mm, concentrated in the six months from April to September, with the highest month being June (165mm) and the lowest month being 65438+February (40.7mm) and 65438+1October (42mm). The historical maximum daily precipitation occurred in Wujiang: 334 mm; Between Suzhou and Kunshan: 292mm；; Taicang is 230 mm In summer, due to the gradual strengthening of the warm and humid airflow in the tropical ocean at low latitudes, the cold air in the Asian continent at high latitudes gradually weakened, and the frontal rain continued during the confrontation between the two airflow, forming a unique "Huangmei" rain in the south of the Yangtze River. Huang Meiyu in Suzhou started in mid-June and ended in early July. The rainfall was about 205 mm, which lasted for about 20 days. Climate and its changes can directly affect the growth and development of vegetation and crops, as well as the distribution, habitat and ecological behavior of wild animals (migration date, wintering period, reproduction, stay, etc. ).

Suzhou has numerous rivers and harbors and lakes. The most famous lakes are Taihu Lake and Caohu Lake in the west corner. There are Dianshan Lake and Hucheng Lake in the east; There is Kuncheng Lake in the north; Among them are Yangcheng Lake, Jinji Lake and Dushu Lake; The Yangtze River and the Beijing-Hangzhou Canal run through the northern part of the city. There are more than 20,000 large and small rivers, forming a complete river network and lake swing system, with a total length of about 1.457 km. The water from Taihu Lake flows into the river northward, eastward and then into the river through Huangpu River. The canal water enters the pavilion from the west and looks out from the south; The "three rivers" that once went out to sea are now discharged into the river from the east of Huangpu River, thus forming three major water systems in Suzhou.

Suzhou's natural surface morphology is the product of a long geological history. It has experienced hundreds of millions of years of stratigraphic deposition from Paleozoic CAMBRIAN to Cenozoic Quaternary and many vicissitudes of seawater leaching, and finally formed today's natural appearance. Suzhou is characterized by gentle plains. The city's geothermal energy is low, and it slopes slowly from west to east. The plain is 3-4 meters above sea level, and Yangcheng Lake and Wujiang River are only about 2 meters. Low mountains and hills are scattered all over the country, generally 65,438+000 ~ 300m high, which are distributed in the western mountainous areas and Taihu Islands, among which Dome Mountain is the highest (3,465,438+0m). In addition, the more famous ones are Dongting Mountain (336m), Dongting Mountain (293m) and Nanyang Mountain (333m). According to the genetic forms and regional characteristics of landforms, Suzhou landforms are divided into two areas: Yangtze River alluvial plain area and Taihu Lake water network plain area, which include six landforms: delta plain, ancient lake plain and rocky mountain area respectively.