Border information of Songyuan City, Jilin Province

geographical position

Songyuan City is located in the middle and west of Jilin Province, between east longitude1236 ′ and north latitude1261′ and north latitude 43 59 ′ and 45 32 ′, with a total area of 2,240 kilometers from east to west and a total area of 172.4 from north to south. It borders Changchun and Siping in the south, Baicheng and Zhemeng in Inner Mongolia in the west, and Heilongjiang Province across the Songhua River in the north.

Topography and geomorphology

Songyuan City is located in Songnen Plain, with flat and open terrain and gentle ups and downs. The terrain is mainly composed of Songnen impact plain and Songliao basin platform plain, with an altitude of 130m to 266m.

Climatic characteristics

Songyuan City belongs to the mid-temperate continental monsoon climate zone. In spring, there is little rain and the temperature rises rapidly; Summer is hot and precipitation is concentrated; Autumn is cool, the temperature changes rapidly, the temperature difference is large, and the weather is sunny; Winter is long, snowfall is small, and it is cold and dry. The annual average temperature is 4.5℃, and the lowest temperature appears in 1 month, and the lowest temperature is-36.1℃; The highest temperature appeared in July, and the highest temperature was 36.9℃. The average annual sunshine is 2879.8 hours, and the frost-free period is 135 ~ 140 days. The annual precipitation is between 400 mm and 500 mm, mostly concentrated in July and August. The precipitation in these two months accounts for about two-thirds of the annual precipitation. It is windy in spring, mainly southwest wind in spring, summer and autumn, and northwest wind in winter, with an average annual wind speed of 3.4m/s. ..

river system

There are many rivers and swamps in Songyuan City, especially three rivers, one river and one lake.

Songhua River (also known as the first Songhua River) begins at the confluence of the second Songhua River and Nenjiang River and flows eastward along the northern boundary of Heilongjiang. The length of domestic flow is120km, and it flows through 8 towns in Fuyu County, covering an area of 2,229 square kilometers. Maximum water level 127.37m, minimum water level 1 19.59m, maximum flow 146003/s, and minimum flow of 346m3/s. ..

The second Songhua River originates from Tianchi Lake in Changbai Mountain and is the largest river in Jilin Province. Enter from Taolaizhao Town in the southeast of the city, cross the city center, turn west and north, join Nenjiang River and flow into Songhua River. The length of domestic flow is188km, which flows through Fuyu and Guo Qian counties and ningjiang district 13 towns, with an area of1332km2. The maximum flow rate is 6750m3/s, the minimum flow rate is 443m3/s, the maximum water level 134.66m, and the minimum water level130.76m. ..

Nenjiang River originates from Ilhuli Mountain in Daxing 'anling, enters from the northwest of the city, flows eastward to join the second Songhua River and flows into the Songhua River. The urban flow length is 6 1.7km, and it flows through two towns in Guo Qian county, with an area of1.8km2, with a maximum flow of 88 10 m3/s and a minimum flow of109m3/s.

Lalin River is a tributary on the right side of Songhua River, which originates from Beshilazi Mountain in Dunhua County. It enters from the east of the city and flows northward into the Songhua River. Its domestic flow is 84 kilometers long and flows through five towns in Fuyu, with an area of 108 1.86 square kilometers. The maximum flow rate is 4030m3/s, the minimum flow rate is 9.32m3/s, the highest water level is 14 1.04m, and the lowest is136.34m. ..

Chagan Lake, located in the northwest of the former Guoerluosi Mongolian Autonomous County, is one of the top ten freshwater lakes in China, with a surface area of 259 square kilometers, a storage capacity of more than 600 million cubic meters and a reed area of 36,000 hectares.