Formation of Terrain in Zhenjiang City, Jiangsu Province

Zhenjiang is a famous historical and cultural city with profound connotation and rich humanities. Zhenjiang has a long history of more than 3,000 years and is an important birthplace of Wu culture. It is not only the birthplace of legends such as "Liu Bei Bride" and "White Snake Flows Over the Golden Mountain", but also the birthplace of famous works such as Wen Xin Diao Long, Zhao Wenming's Selected Works and Meng Qian Bi Tan. "Looking at China, you can see the North Gome Tower", "Luoyang's relatives and friends are like asking each other, and there is a piece of ice in the jade pot" and "I urge the immortals to regain their spirits and drop talents without sticking to one pattern". The famous sentences left by Zhenjiang literati in past dynasties have been told by people for thousands of years.

resources geography

The low hills in the city are mainly yellow brown soil, the hills are mainly loess, and the plains are mainly paddy soil. In the land area of the city, hilly areas account for 5 1. 1%, polder areas account for 19.7%, plains account for 15.5%, and water surfaces account for 13.7%. At the end of 2003, the cultivated land area was157,300 hectares, including 4 1770 hectares in the urban area, 54,970 hectares in Danyang, 49,220 hectares in sentence area and 0/1340 hectares in Yangzhong. Water resources There are more than 60 rivers in the city, with a total length of more than 700 kilometers, most of which are artificial canals. The water system is divided into northern areas along the Yangtze River, eastern Taihu Lake and western Qinhuai River. The Yangtze River flows through the territory, with a total length of 103.7 km. The Beijing-Hangzhou Grand Canal, with a total length of 42.6 kilometers, joins the Yangtze River at Jianbi. The total capacity of artificial reservoirs and ponds in this city exceeds 500 million cubic meters. Among them, there are 0/07 reservoirs/kloc, with a storage capacity of 65,438+10,000 cubic meters and a storage capacity of 374 million cubic meters. Mineral resources are mainly concentrated in Ningzhen mountain range. Minerals include metallic minerals such as iron, copper, zinc, molybdenum, lead, silver and gold, and nonmetallic minerals such as limestone, bentonite, dolomite, marble, phosphorus, refractory clay, gypsum and graphite. Among them, limestone mine has excellent quality and reserves of more than 3 billion tons; Bentonite ore1.500 million tons, ranking third in China. Baohuashan discovered the first large andalusite mine in the province, which has a broad development prospect. In addition, there are coal, peat and geothermal resources. Zhenjiang is surrounded by mountains and waters [1]. In terms of biological resources plants, deciduous broad-leaved trees include Quercus acutissima, Castanopsis fissa, Pistacia chinensis, Sophora japonica, Pterocarya stenoptera and so on. Evergreen broad-leaved trees include oak, bitter bamboo and heather. There are more than 700 kinds of medicinal plants. The introduced tree species are black pine, Chinese fir and paulownia. Baohuashan Nature Reserve has the rarest Magnolia grandiflora in Magnoliaceae. Animals are rich in fish resources, including fresh-water cultured fish such as green grass, silver carp and carp, as well as non-artificial cultured fish such as abalone, catfish and eel. There are more than 90 species of fish in the Yangtze River, among which saury, herring, eel, fish back and puffer fish are rare species. Baiji dolphin and Chinese sturgeon are rare animals in China. There are more than 100 species of birds and more than 20 other wild animals in this city. Climate resources According to the climate data of 197 1 -2000, the annual average temperature in urban areas is 15.6℃, and the precipitation is 1088.2 mm, of which plum rains are 263.3 mm, sunshine hours are 2000.9 hours, and the extreme maximum temperature is 40.2℃. In 2003, there was much precipitation in winter, much precipitation in summer and rainy weather, which was a rainy year. Temperature and sunshine are normal.