Main tributaries of Hanjiang River Basin

The main tributaries of the Han River are Baohe, Danjiang, Tangbaihe and Ceng He. Nanhe and so on.

The longest tributary is the Danjiang River, with a total length of 390 kilometers, which is the longest tributary of the Han River, with a drainage area of 1.73 million square kilometers, accounting for 10% of the total drainage area of the Han River.

The largest tributary is Tangbai River, with a drainage area of 24,500 square kilometers. With Baihe as the source, the total length is 3 12km (from Tangbaihekou to Baihe source).

Tangbai River, Tanghe River and Baihe River are collectively called Tanghe River which originates from Funiu Mountain in Fangcheng County, Henan Province and Baihe River which originates from Songxian County, Henan Province, and flows to Shuanggou Town, Xiangfan City, Hubei Province. Into the mainstream of Jin Dong Town, Xiangfan City. Taking the Baihe River as the source, the total length is 3 12km (from the mouth of Tangbaihe River to the source of Baihe River), the drainage area is 24,500km2, the annual average flow is 182 m3/s, and the natural drop is 1226m. The whole water system is slightly fan-shaped, and the length of the main branches and tributaries in the mountains is very short. Baihe is only 90km away from Montenegro and Tanghe is only 30km away from Jin Dian. Most rivers are on the plains. After the main tributaries entered the plain, the meandering river developed and some distributaries appeared. For example, there is the Old White River to the east of Xinye, which was the mainstream of the White River before the Eastern Han Dynasty. It can be inferred from the ruins of the town along the river that it used to be navigable. Dongwan, Wadian District, Nanyang, originally belonged to the west of Baihe River, but now it is changed to Hedong. The lower reaches of Tangbaihe River flows into the Han River at the mouth of the present Qinghe River after passing through the original Naqinghe River, and then diverted to Zhangjiawan to enter the Han River due to siltation, and Qinghe River enters the Han River alone. The channel of Tanghe River is relatively stable, and there are few similar changes. Most tributaries of Tangbaihe River flow through Nanyang area, which has been one of the more developed areas of traditional agriculture in China since ancient times.

Danjiang River, commonly known as Danhe, also known as Shui Jun, also known as Danyuan, originated in the southwest of the watershed between Lantian County and Shangxian County, Shaanxi Province, and is homologous to Weihe River, a tributary of Weishui River, and goes upstream. Southeast flows through Shangxian, Feng Dan, Yang Shan and Shangnan counties in Shaanxi, Xichuan and Neixiang counties in Henan, and flows into Hanshui River in danjiangkou city, Hubei. With a total length of 390 kilometers, the main stream is the longest tributary of the Han River, with a drainage area of 1.73 million square kilometers, accounting for 10% of the total drainage area of the Han River. The annual average flow is 174 m3/s, and the natural drop is 140 1 m ... The water system is developed and there are many tributaries. The main tributaries are Wuguan River, Qihe River, Xihe River and Taohe River. The most striking geomorphological feature of Danjiang River Basin is that the valleys along the river alternate with the flat land. From Danjiangkou to Qinling Mountains, there are Jiangkou Canyon, Liguanqiao Basin, Guanfangtan Canyon, Xichuan Jingziguan Basin, Xianghe Street Canyon, Zhu Lin Guanpuyu River Wide Valley, Liu Ling Canyon, Feng Dan-Shangxian Basin, and finally Qinling Canyon. This terrain is very conducive to the construction of reservoirs. The banks of the canyon are high and steep, so high dams can be built, and the wide valley of the basin can also accommodate a lot of floods. The famous Danjiangkou Water Control Project is built at the confluence of Hanjiang River and Danjiang River.

Blocking the river, also known as Wuling water, also known as Yongshui and Douhe, is the third tributary of the Han River, with two sources: the south source comes from the northeast foot of Shenlongjia in Hubei, the north flow is called Guandu River, and the two estuaries in Zhushan County meet at Xiyuan; The west source comes from the southern foot of Daba Mountain between Shaanxi and Sichuan Province. The south flow is called Pingxi River, and zhenping county is called Nanjiang. It enters Zhuxi County, Hubei Province and is called Wanhui River. It is called blocking the river after meeting with the south source. The trunk flows through Zhushan, Fangxian and Shiyan, and flows into Hanshui River in Xiliu Town, Yunxian County. Xiyuan is the main stream, with a total length of about 342km and a drainage area of 1243 1 km2. Average slope 1.93‰, natural fall1586m. Huanglongtan Hydrological Station has an average sediment discharge of 8.34 million tons for many years, with an annual average sediment transport modulus of 695 tons /km2. It is one of the areas with high sediment value in Hubei, with serious soil erosion. The river bends, and the bending coefficient of the main stream is 1.87, which is a mountainous curved river type. The main tributaries are Tankou River, Kutao River, Beixing River, Guandu River, Quanhe River and Zhuxi River.

Baohe River, called Wulong River in ancient times, is also called Taibai River and Baoshui River. There are two sources: the east source comes from the southwest side of the watershed between Taibai County and Baoji County in Shaanxi Province, and the southwest flow is called Hongyan River; Beiyuan comes from the mountainous area near Qinling Valley in the east of Fengxian County, Shaanxi Province. It joins Dongyuan in Jiangxi Camp of Liuba County and enters Hanshui River in Hanzhong City. Total length 198km, with a drainage area of 3940km2. No matter the length, basin area or water volume, it exceeds Qushui, so some people advocate taking Baohe River as the positive source of the Han River. The basin is mountainous and the river is DC. The main tributaries are Shazi River, Wuguan River, Taibai River and Yangjia River. [9]?

Ceng He (now called Guanshanhe) originates from Maozigou of Matishan Mountain in Fangxian County, flows into Yuanjia River of Guanshan Mountain from Jiamadong, joins Xihe River through two estuaries, and then flows northward to Chaoshan Mountain to join with Ku River, and joins with Hezi River and Jian River through Haokou. East, there are Dazhi River and Xiao Zhi River; Beiliu River 15km flows into Huangsha River and flows into Hanshui River through Zenghekou, with a total length of 163km and a drainage area of 880km2. It has been the irrigation source for Guanshan, Liu Liping, Caodian and Taochuan. After the Danjiangkou Reservoir was filled, it became a part of the reservoir from below Liu Liping Haokou, with a flow length of only 69.2 kilometers.

Langhe River originated from the watershed between Yanchihe Town and Fangxian County in danjiangkou city. One source is Baiguoshu East and the other is Paomaling East. It is divided into two streams, the north flows into Fangxian County, and the south flows into Wujiahe, Yanchi River, Changtan River and Toad Mouth. After Langhedian West, Xiaojieshan, Daoxian Temple and Yinjiahe; Beiliu River flows into Hanshui River from Huaguoyuan to Langhekou, with a total length of152km and a drainage area of 700km2. After the Danjiangkou Reservoir is filled with water, it flows southward to Daijiawan, Langhe Town, and enters Danjiangkou Reservoir, with a total length of 62.45 kilometers. [ 10]?

Nanhe River, which originates from Fenqing River in Yangri Bay, reaches Shennongjia in the south and Malan River in Wudang Mountain in the north, flows through various Tibetan caves in Baokang County and joins Nanhe River, and enters Gucheng County from Dongzhuangyu. From the county seat into Hanshui to Geleizui. In Hujiadu, 23km away from Gucheng County, the largest hydropower station in Xiangfan City in 1980s was built at 1980. [ 1 1]?

Renhe River, the largest tributary of the upper reaches of the Han River, originates from the Great Yanshan Mountain (formerly known as Wan Qingshan) at the junction of Chengkou, Wuxi County and zhenping county, Shaanxi Province, flows northwest through Chengkou and Wanyuan counties, crosses Daba Mountain, enters the county territory in Jing Qing and Liu Ma towns, turns northeast, and joins the Han River in the south of the county seat. The total length is 2 1 1.4 km, commonly known as 700 Li. The average width of the basin is 20 ~ 25 square kilometers, with a total area of 487 1 square kilometer. It is 56.9 kilometers long in this county. The river bed is narrow, and the river surface is wide100 ~150m. The normal water level is 50 ~ 80 meters wide. Renhe River and its main tributaries Hezhu River, Maliuba River and Quanhe River are the concentrated production areas of tea, ramie and raw lacquer in the county. There are natural towns such as Maliuba, Maobaguan, Gaotan, Gao Qiao, Wafangdian and Hongchunba along the coast.

Ruhe River, originating from the northern slope of Daba Mountain, flows through six towns including Liuhe, Qiaozhen, Jiefang, He Miao, Chaizu and He Qian, and joins the Han River in the west of Donghe Natural Town. The upper section is named Liudao River, and the middle section is named Xujiahe. The total length of the main stream is 5 1.9 km, and the total drainage area is 262.75 square kilometers, all of which are in the county. The riverbed gradient is 30.3‰, with an average width of 50m. The upstream is located in a large natural forest area with abundant water.

Donghe River is located on the east side of Ruhe River, and flows through 8 towns and villages in Langao County, such as Ling Jie, Bantao, Huishui, Manglian and Taishan, and starts at Yanmen and Changchun, and joins the Hanjiang River in Donghe Natural Town. Wubao originates from Daba Mountain and is divided into Dabei River and Badao River, which are located in Gao Lan and Ziyang respectively. The main stream is 69. 1 km long, the county boundary is 6 1.9 km long, and the total drainage area is 532 square kilometers. There are three natural towns along the coast: Turtledove Pass, Huishuiwan and Donghe.

Linben River, which originates from the southern slope of Fenghuang Mountain, collects the water from six towns in Ankang County, such as Anxi, Shuang 'an, Wulin, Seoul, Niuti and Chaotian, and flows into the Han River in Wulangping and Hancheng, and at Sanyuangou, Jinchuan Township. The upstream tributaries are Xiniu River, Liaojiahe River, Noisy River and Anjia River, and the downstream tributaries are named Shaping River. The total length of the main stream is 35.3 kilometers. The coastal terrain is open and gentle, and it is a concentrated production area of rice and cocoon in this county.

Haoping River, which originated in dishuiya, the northern slope of Fenghuang Mountain battery beam, flows through three townships (towns) in Ankang County, such as Yan Hao, Fuqing and Zhengyi, and joins the Han River in Dazhuyuan. The main stream is 37.9 kilometers long. The domestic length is 1 1.4 km, and the total drainage area is100.8km..

Mianyu River, also known as Catfish River, originates from the northern slope of Micang Mountain and branches in Wang Jiagou of Sanguantang Township and Jianshangou of Yunfeng Township. It is called East Qiyuan River in the west and Wulong River in the east. The main stream is 19.95 km long and flows into the Hanjiang River in Chunshuya dialect. The basin covers an area of 64 square kilometers.

Mianyu River is a river formed by faults. Originated in Mingyazi, Beidou Township, it flows through Beidou Township and Wulin Township and flows into the Han River from east to west. The length of the main stream is18.86km, and the drainage area is 5 1 km2.

In addition to the above-mentioned major rivers, there are 6 tributaries whose main stream length is less than 10 km and the drainage area is less than 20 square kilometers, including Song He, Mofanggou (also known as Mofanggou), Ximen River, Ziyanggou, Changtangou, Mixi and Xiaomi River. [ 12]?