Heilongjiang is named after the river water contains a lot of humus and is dark in color. It was called "Black Water", "Weak Water", and "Wanshui" in ancient times, "Wangjian River" in Tang Dynasty, and "Heilongjiang" in "History of Liao" (in Liao and Jin Dynasties, Songhua River entered Heilongjiang and reached the sea as "Huntong River").
In the early Qing Dynasty, it was called "Saharian Ula". In Manchu, "Saharian" means "black" and "Ula" means "river". In the Qing Dynasty, it was also called "Wujiang" and "Wulongjiang". It is called "Amur River" in Russia.
The origin of the name of Heilongjiang has been verified by scholars. In the early Liao Dynasty, Taizu was often named after the word "Black Dragon". For example, there is a Taizu temple in Zuzhou called "Heilong", and a gate in Taizu's mausoleum is called "Heilong". ". At this point, the name "Heilongjiang" became known to the world. Another local chronicle records: "The water in Heilongjiang is black and winds like a dragon, so it is named Heilongjiang."
Extended information
Heilongjiang rivers are mainly supplied by monsoon rains that fall in summer and autumn. The rainwater quickly flows into the river, causing a flood period from May to October. Its average flow rate is approximately 10,900 cubic meters/second (385,000 cubic feet/second).
In winter, near Khabarovsk, the flow rate decreased to 148 to 199 cubic meters per second (5300 to 7100 cubic feet per second); the highest flow rate recorded in 1897 was more than 39,200 cubic meters. / second (1,400,000 cubic feet/second). In 2013, the peak flow rate in the Tongjiang section of Heilongjiang Province reached 43,000 cubic meters/second (1,518,533 cubic feet/second).
Heilongjiang begins to freeze in the second half of October. The upper reaches freeze in early November, and the lower reaches freeze in the second half of November. The lower reaches of the river thaw at the end of April and the upper reaches at the beginning of May. Ice jams often occur in river bends and can temporarily raise water levels by as much as 15 meters (50 feet). Rivers bring about 20 million tons of sediment a year.
Baidu Encyclopedia-Heilongjiang