Haihe River in China is one of the five major rivers. In Beijing and the east of Hebei Province. There are two tributaries in the upper reaches: the tidal source originates in Fengning County, Hebei Province, and flows south to Miyun Reservoir via Gubeikou. The Baihe River originated in Guyuan County, Hebei Province, and flowed into Miyun Reservoir along the way, including Heihe River and Tanghe River. After leaving the library, the two rivers meet in Hecao Village, Miyun County, which is called Chaobai River. Southwest flows through Niulan Mountain into the plain, and enters the North Canal through Shunyi and Tongxian.

19 12 The Chaobai River in Lisui Town, Shunyi burst, and some rivers seized arrows and entered the Su Canal. The total length is 90 kilometers (from Hecao Village to North Canal), and the drainage area is 1.95 million square kilometers.

The ravine in the upper reaches of Chaobai River is narrow and flows into the plain below Suzhuang. The river bed gradient is small and the valley is wide, which is prone to floods.

/kloc-excavated Chaobai new river in 0/950, and then built Miyun and Huairou reservoirs to control floods in mountainous areas. Two streams of drainage from Miyun Reservoir enter Chaobai River system. One goes into the sea via Tianjin and is used for domestic water supply in Tianjin; A small stream flows into the urban area of Beijing through Jingmi diversion canal and Huairou reservoir, which is one of the important water sources in Beijing.

Chaobai River is an important river flowing through the north and east of Beijing, belonging to Haihe River system. There are two tributaries in its upper reaches, the Chaohe River in the east and the Baihe River in the west. Chaohe River, called Dayu River and Weihe River in ancient times, is also called Baoqiu (Qiushui) water, and it is called Chaohe River because of its "sound like tidal surge".

Originated at the foot of Nanshan in Caonianzigou, Fengning Manchu Autonomous County, Hebei Province, it passes through Luanping County and enters Miyun County from Gubeikou, where tributaries such as Andamu River, Qingshui River and Hongmenchuan join Miyun Reservoir near Xinzhuang, with a length of 72 kilometers. Baihe, known as Guanhu, Shui Gu, Shui Gu, Lushui, Luhe, Lianshui and Baiyu River in ancient times. The river is sandy and white, hence the name Baihe; The river is fierce and the migration is impermanent, commonly known as the Freedom River.

Originated in Guyuan County, Hebei Province, it passes through Chicheng County, enters Yanqing County of this city at Baihebao, flows eastward through Qingshiling in Huairou County, enters Miyun County, joins tributaries such as Heihe River, Tanghe River and Baimaguan River along the way, and injects into Miyun Reservoir near Zhangjiafen. After leaving the warehouse, Chaobai River and Chaobai River discharge their old rivers and meet in Hecao Village in the southwest of Miyun County, which is called Chaobai River. The south flows through Huairou County and Shunyi County, reaches Tongxian County, joins Huaihe River and Jiang 'an River, goes out of the city in Niumutun, Tongxian County, enters Hebei Province, flows eastward into Haihe River, and empties into Bohai Sea.

Chaobai River and its tributaries constitute the Chaobai River water system, with a drainage area of 653 1 km2, accounting for 33. 4%, the average annual runoff 1.22 billion cubic meters, accounting for 39. 4% of the total urban water system runoff. Both are ranked first in the city. After liberation, two large reservoirs, Miyun Reservoir and Huairou Reservoir, five medium-sized reservoirs and 33 small reservoirs were built on this water system, with a total storage capacity of 4,668.67 million cubic meters, ranking first among all water systems in the city. Taking Miyun Reservoir as the water diversion source, the Jingmi diversion canal leading to the urban area is the main water supply artery in Beijing. Chaohe River and Baihe River have been diverted many times in history. Before the Eastern Han Dynasty, Chaohe River and Baihe River entered the sea respectively; In the Northern Wei Dynasty, they met in the northeast of Tongxian County (Lu Xian County). Later, the meeting point gradually moved northward and met in Niulanshan, Shunyi County in the Five Dynasties. In the thirty-fourth year of Jiajing in Ming Dynasty (1555), in order to use Chaobai River to reach the canal, it began to converge at Caocun (18), a river course in the southwest of Miyun County.