The basic situation of the main stream of the Songhua River

The junction of second Songhua River and Nenjiang River that was in the vicinity of the Sanchahe was known as the main stream of the Songhua River. The altitude of confluence was 128.22m. It flowed through Zhaoyuan, Songyuan, Qianguo, Fuyu, Shuangcheng, Zhaodong, Harbin, Hulan, Acheng, Binxian, Bayan, Mulan, Tonghe, Fangzheng, Yilan, Tangyuan, Jiamusi, Huachuan, Suibin, Fujin, Tongjiang and other cities and counties. In the Tongjiang County northeast of about 7km, injecting the Heilongjiang River from the right bank. The height of the estuary was 57.16m and the total length of the main stream was 939km. The area of the interval water collection was 186 thousand and 400 km2. According to the topography, the terrain and the characteristics of the river, the main stream of Songhua River could be divided into three sections: upper, middle and lower. From the Sanchahe to Harbin was the upper river, from Harbin to Jiamusi was the middle river, from Jiamusi to the estuary was lower river.