What is the geographical environment of Changsha?

Location Changsha is located in the northeast of Hunan Province, the lower reaches of Xiangjiang River and the western edge of Changliu Basin. Its geographical range is11153 ′ ~1415 ′, and 27 5/0/′ ~ 28 4/kloc. It is adjacent to Yichun and Pingxiang in Jiangxi Province in the east, Zhuzhou and Xiangtan in the south, Loudi and Yiyang in the west and Yueyang and Yiyang in the north. It is about 230 kilometers long from east to west and 88 kilometers wide from north to south. The city's land area is 1 18 19.5 square kilometers, of which the urban area is 556 square kilometers. Changsha has jurisdiction over five districts of Furong, Tianxin, Yuelu, Kaifu and Yuhua, three counties of Changsha, Wangcheng and Ningxiang and Liuyang City.

Changsha has a subtropical monsoon humid climate. The climate is characterized by mild climate, abundant precipitation, simultaneous rain and heat, and distinct four seasons. The annual average temperature in Changsha is 17.2℃, the annual accumulated temperature in each county is 5457℃, the annual precipitation is 136 1.6 mm, and the annual precipitation in each county is 1358.6 ~ 65438. Changsha is long in summer and short in spring and autumn, with about 1 18- 127 days in summer, 1 17- 122 days in winter and 6 1-64 days in spring. The temperature changes greatly in spring, with more rain in early summer, long high temperature in summer and autumn and less cold in winter. From late March to mid-May, cold and warm air crossed each other, forming continuous rainy and low temperature weather. Since the end of May, the temperature has obviously increased. In summer, the average daily temperature is above 30℃ for 85 days, and in hot days above 35℃, the average annual temperature is about 30 days, and it is very hot and rainy in summer. After the end of September, it is warmer during the day and cooler at night, with less precipitation and more low clouds. 165438+ 1 from late October to mid-March of the following year, the severe cold period in Changsha is very short, and1is the coldest in June, with a monthly average of 4.4℃-5. 1℃. Overwintering crops can safely overwinter and grow slowly.