Where does Chongqing rank in the world in terms of total area and population?

Chongqing, referred to as "Chongqing" for short, is located in the mid-latitude zone in the west of China, with the third population, north latitude10511'-kloc-0/1',and north latitude 28 65438'. It is adjacent to Hubei Province and Hunan Province in the east, Guizhou Province in the south, Sichuan Province in the west and Shaanxi Province in the north, which is the junction of economic development in central and western China.

Chongqing is located in the center of the Three Gorges reservoir area. The Chongqing section of the Three Gorges Reservoir Area includes Wushan, Fengjie, etc. 18 counties (cities), covering an area of 46,000 square kilometers, accounting for 55.82% of the city's total area. After the completion of the Three Gorges Reservoir, it will form the world's largest valley reservoir with a storage capacity of 39.3 billion cubic meters, and a fleet of 10,000 tons can fly directly to Chongqing, implementing river-sea combined transport, improving transportation capacity and expanding material exchange, which is conducive to Chongqing's reform, opening up and modernization.

[Area] The city covers an area of 82,400 square kilometers, which is 2.39 times the total area of Beijing, Tianjin and Shanghai, and is the largest municipality directly under the central government in China.

[Population] 1999 The total population of the city is 30.75 million, accounting for 2.44% of the total population of the country.

There are more than a dozen ethnic groups such as Han, Hui, Miao and Tujia, and the minority population accounts for 5.7%.

[Administrative Division]1March, 199714th, Chongqing was officially approved to establish a municipality directly under the Central Government, and now it has jurisdiction over four municipal districts including Yuzhong, Yubei, Shapingba, Beibei, Nan 'an, Wansheng, Wanzhou and Fuling, and four county-level cities including Jiangjin, Hechuan, Yongchuan and Nanchuan./kloc

natural conditions

[Topography] The topography and geomorphology structure in Chongqing area is complicated. Geomorphological types can be divided into five categories according to their forms: Zhongshan, low mountains, hills, terraces and plains (dams). Zhongshan is located in the north and southeast of Chongqing, which constitutes the marginal mountain of Sichuan Basin, with an area of 42,590 square kilometers, accounting for 5 1.2% of the total area of the city. Lanyingzhai, the main peak of Tianchi Mountain, is the highest peak in Chongqing, with an altitude of 2793.8 meters. Low mountain area 19876 square kilometers, accounting for 24.1%of the city's area; The hilly area is 14954 square kilometers, accounting for 18.2% of the city's area, mainly distributed in the western region on the left bank of the Yangtze River; The platform covers an area of 2,943.36 square kilometers, accounting for 3.6% of the city's area. Flat dam area 1970.775 square kilometers, accounting for 2.4% of the city's area.

There are many rivers in Chongqing. There are 374 rivers with a total drainage area of over 50 square kilometers. Except Renhe River in the north flows into Hanshui River, Youshui River in the southeast flows into Yuanjiang River, Laixi River and Daqing River into Tuojiang River, and the rest flows into the Yangtze River in China. The rivers on the left bank are many and long, showing a lattice system; The right bank is generally short and few, showing a tree-like water system. The main rivers are: Yangtze River, Jialing River and Wujiang River.

[Climate] The climate of Chongqing belongs to the humid monsoon climate type in Central Asia, which is characterized by (1) hot summer and warm winter, and a long frost-free period. The annual average temperature in Chongqing is 18.4℃ (Shapingba), and the annual average temperature in Yunyang of the Yangtze River Basin is 18.8℃. The average temperature in the hottest month (July) is 34.4℃, and the extreme maximum temperature is 44. 1℃ (Fengdu), making it one of the three "stoves" in the Yangtze River. The average temperature in Leng Yue (65438+ 10 month) is greater than 4℃, the frost-free period is 340-350 days, and the active accumulated temperature greater than 0℃ is 60 10-6900℃, which is the longest frost-free period in the same latitude. (2) The precipitation is abundant and unevenly distributed in time and space. The average annual precipitation in Chongqing is about 1 100 mm, accounting for 40%-50% in summer and only 4%-5% in winter. There are many rainstorms, affected by the Qinghai-Tibet high and subtropical high, and there are often 30-50 days of drought in July and August. The precipitation varies greatly from year to year, and the precipitation in rainy years is generally 2.5-3 times that in dry years; The annual precipitation of Qianjiang is 1445.3mm, while that of Tongnan in the west is only 987.5mm. (3) It is rainy in autumn and foggy in winter, with few sunshine hours. The probability of average rainy days in autumn in Chongqing is 1. 1-2.3 times, the average rainy days are 13.7- 15.8 days, and the precipitation is 268-424 mm, accounting for 24%-365438+ of the annual precipitation. The average annual foggy days in Chongqing are 67.8 days (Shapingba). The maximum year is 148 days, so it is called "foggy city". (4) The vertical differentiation of climate is obvious. The relative height difference of Chongqing is 2720.7 meters, forming an obvious three-dimensional climate zone spectrum. The temperature decreases with the elevation, and the decreasing rate is generally 0.57℃/ 100m, and the decreasing rate of annual active accumulated temperature is 207℃. However, due to the influence of topography, Chongqing generally has two inversion layers, about 500-600 meters and 800 meters. The precipitation increases with the elevation, and the rain areas vary from place to place. The elevation of Bamian Mountain in Youyang is1200m, the annual precipitation is 1852. 1 mm, the elevation of Jinfo Mountain in Nanchuan is1600m, and the annual precipitation is1654.4mm. ..