Where does the Yitong River in Changchun finally flow into? When was the Yitong River formed?

It winds to the southeast of Kaoshan Town, Nong 'an County, and flows into Yinma River. In the 20th year of Emperor Kangxi of Qing Dynasty (1682), the Qing government opened the Yitong River channel to resist Russian invasion of Heilongjiang River basin. Grain and grass are transported by water to small towns in East Liaohe River, and by land to Yitong River, and transported northward on a 30-foot-long boat, connecting Liaohe River with Songhua River and Heilongjiang River.

Yitong River, a Millennium ancient stream in Changchun Plain, a secondary tributary of Songhua River. It originates from the northern foot of Dingqing Mountain in Hadaling Mountain range of Yitong County, Jilin Province, and flows through Yitong County, Changchun City, dehui city and Nong 'an County. The main tributary (from south to north) is Xiaoyitong River.

Gangouzi River, Shuangmiaozi River, Yidan River, Suacaogou, Xiaoheyanzi River, Xihegou (Fanhua Road-Nanhu-Zoo and Botanical Garden-Jishun Minggou), Dongxin Kaihe, Sijian River (i.e. series reservoirs), Xinkai River, Nong 'an main drainage canal, Liangjiazi River, Xiaoweizigou and Daweizigou, etc.

Yitong River joins Yinma River 5 kilometers below Kaoshan Bridge in Kaoshan Town, Nong 'an County, and the flow from the source to the confluence is 343.5 kilometers. Because the flow of Yinma River above the confluence is 368 kilometers, which is more than 20 kilometers longer than Yitong River, according to the principle of "the source is only long", Yinma River is the main stream, and this basin is collectively called Yinma River Basin.

After the two rivers meet, they continue to flow northward for 20 kilometers and join the Songhua River.

River basin survey

Yitong River Basin is located in the temperate continental monsoon climate zone, with dry wind in spring, exceptionally warm summer, mild and cool autumn and long and cold winter. The annual average temperature is 4.6℃, the annual average wind speed is 3.3 meters per second, and the southeast wind.

The average annual precipitation in the basin is 608.6 mm, mostly from June to September, accounting for 75% of the annual precipitation. The average annual evaporation is 598.6 mm, and the freezing period of the river is165438+1mid-October to early April of the following year, 140 days. The average annual runoff of the basin is 497 million cubic meters, and the average annual sediment discharge is 310.7 million tons. The water quality below Xinlicheng Reservoir is worse than Grade V, accounting for 86.2%.

Refer to the above? Baidu Encyclopedia-Yitong River