Longxuhe

An ideal place to return to nature

Longxuhe

Longxuhe river was called Ruoxi River and tuomingshui River in ancient times,

It is a tributary between Qianjiang and Xunjiang of the Xijiang River, and a tributary of the Yujiang river. It originates from Bameng karst area in the north of Jingxi County, Guangxi Zhuang Autonomous Region, flows through Jingxi County and Debao County, and flows into Youjiang River in Tiandong county. It has a total length of more than 130 kilometers, a drainage area of 2750 square kilometers, an annual runoff of 1.47 billion cubic meters and a runoff depth of 550 mm.

Bameng reservoir is built at the source, agricultural irrigation conditions in the upper reaches of Bameng River Basin are better, and hydropower resources in the middle and lower reaches of Jianhe river and Longxu River are rich, and a series of power stations are built.

General situation of main stream

Longxuhe river was called Ruoxi River and tuomingshui River in ancient times,

It is a tributary between Qianjiang and Xunjiang of the Xijiang River, and a tributary of the Yujiang river. It originates from Bameng karst area in the north of Jingxi County, Guangxi Zhuang Autonomous Region, flows through Jingxi County and Debao County, and flows into Youjiang River in Tiandong county. It has a total length of more than 130 kilometers, a drainage area of 2750 square kilometers, an annual runoff of 1.47 billion cubic meters and a runoff depth of 550 mm.

In Jingxi County, it is called Bameng River and Guishun River in ancient times. Part of the earth's surface originates from the fountain at the foot of the stone mountain in the south of xinlixu, Quyang town. The fountain originates from dadongtun, Tingna village, Kuiyu township. After the latent flow, it erupts. Bameng reservoir has submerged the riverbed 10.75 km from the source. After leaving the reservoir, it flows from northwest to Southeast, reaches 500m east of Bameng street, and turns to northeast. In the east of tuntuntun, nongtie village entered Debao county. In the county, there are 10 village streets, including Xinli, qulei, Huaishu, Dongfeng, Quyang, pole, Bameng, Longgang, Kugan and nongtie, which flow through Quyang, Bameng and Dadao. The inland river of the county is 26.5 km long, and the drainage area is 370 square kilometers, accounting for 11.1% of the total area of the county. The drainage area is full of karst landforms.

In Debao County, it is called Jianhe. Duosang village from Jingxi County to Du'an township of Debao county is divided into Du'an tributary and Xintun tributary (Baibu underground river). Du'an tributary flows through Fushan, Du'an, Qijiang and other villages of Du'an township to jiantun exit of Sanhe Village of Du'an township; Xindian tributary flows to baibutun exit of Sanhe Village. The two outflows converge to form an open flow. 17 villages, including Sanhe, Baidu, Ma'an, Shangjia, Baisheng, Chengguan, Dongqi, nazao, Nawen, Yibei, Naliang, Maqiao, Nalin, Shangmao, Ronghua, Shanghe and Dakun, flow into Tiandong county. Jianhe river flows 70 kilometers in Debao County, with a drainage area of 2166 square kilometers

In Tiandong County, it is called longxuhe river. It starts from Tuogua village of Zuodeng Township, passes through Powei, Xinfa, Denggao, Daban and Youchang village of Pingma Town, and flows into Youjiang River at nahengtun estuary of nahengcun village. Tiandong county has a drainage area of 284 square kilometers and a river length of 41 kilometers.

hydrographic features

In Bameng reach of Jingxi County, the low flow is zero, the average annual flow is 7.04 cubic meters per second, the flood flow in flood season is 640 cubic meters per second, the average annual runoff depth is 460 mm, and the average annual runoff is 170 million cubic meters. The riverbed is 30-40m wide and the bank is 2-3m high.

Jianhe river in Debao county has an average elevation of 483m. The annual average flow is 34.1 cubic meters per second, the maximum flow is 884 cubic meters per second, and the minimum flow is 2.15 cubic meters per second. From the west of nashengtun, Baisheng village, Dongguan Township, the section of the river flows through limestone area with karst development and many twists and turns of river channels, with an average gradient of 4.44 ‰; from the east of nashengtun to pinggaitun, Dakun village, Ronghua Township, the section of the river flows through sand shale area with steep river channel and rapid flow, with an average gradient of 7.16 ‰, The riverbed has multi-level water drop, the maximum gradient is 25.6 ‰, and it is not navigable. The average runoff depth is 631.2 mm, with an annual variation of 269.4-1075.9 mm; the average annual runoff is 1.115 billion cubic meters, with an annual variation of 450-1.9 billion cubic meters; the average annual runoff modulus is 20 liters per second square kilometers, with an annual variation of 8.55-34.1 liters per second square kilometers, and the natural drop is 532 meters. The available fall is 335.4m. The water energy reserves are 108800 kilowatts, and 17030 kilowatts can be developed.

In the lower reaches of Longxu reach in Tiandong County, the natural drop is 105m, the riverbed gradient is 2.56%, the maximum discharge is 1310 cubic meters per second, the average discharge is 52.5 cubic meters per second, and the minimum discharge is 3.2 cubic meters per second (from February to March every year).

water conservancy project

From 1958 to 1960, the Bameng reservoir was built in the Bameng reach of Jingxi County, 300 meters northwest of quyangxu, with a total capacity of 92.28 million cubic meters, which fundamentally changed the characteristics of the Bameng river. Before the construction of the reservoir, the river bed dried up in winter and spring, and the people on both sides of the river (including two villages in Du'an Township, Debao county) had difficulty in drinking water. In summer and autumn rainy season, due to the low river bank, the river bed drop was small, and the water flow was slow, with the flow rate of 640 cubic meters per second in flood season, the flood often overtopped the bank and submerged the low-lying farmland. After 1961, the flood was stopped by the reservoir, and the drinking water for people and livestock along the river banks was completely solved. Originally, 25000 mu of farmland was mixed with drought and flood, which became the farmland with high and stable yield, and became the main grain producing area in Bameng and Dadao townships. The natural drop of river bed in the county is 14.5m, and the average gradient is 0.93 ‰. The only way to develop water resources is the built bashou hydropower station of Bameng reservoir, with two installed units and a capacity of 250 kW. There are no conditions for further development along the river. However, every year, 91 million cubic meters of water from Bameng reservoir can be channeled through Bameng, Dadao, Wuping and other townships to flow into Luoshui, and a power station can be built in sandialing for cross basin development and utilization.

Jianhe river in Debao county was built from Ming Dynasty to the Republic of China. Guangou (later called Shanggou), maanzhonggou, Xiagou and Dongjiao water conservancy projects were built to irrigate 5000 mu of farmland with Jianhe river. During the period of the Republic of China, Maqiao water conservancy project was built, with a total length of 5 kilometers and 690 Mu irrigation land. From 1955 to 1969, Xirong (Xidu to Zurong), he'an (Sanhe to Anzhong) and Xinian (Xidu to Nianle) water conservancy projects were successively built in the upper reaches of Jianhe river to irrigate 25200 mu of farmland. From 1959 to 1989, Sanhe hydropower station, Gulong hydropower station, Duoluo second hydropower station, Duoluo third hydropower station, Duoluo fourth hydropower station, Ronghua hydropower station, Napai hydropower station, Dongqi hydropower station, nakou hydropower station, Nawen hydropower station, Lutun hydropower station, Guli hydropower station, nashen hydropower station, pojin hydropower station, Pozao hydropower station, Naguang hydropower station, Weitun hydropower station, nongtun hydropower station, Bainian hydropower station, tingzi hydropower station, Hongshan hydropower station, Shangmao hydropower station, Nalin hydropower station, poping hydropower station, Naying first hydropower station, Dakun hydropower station, Pojiao hydropower station, duofeng hydropower station and Naying second hydropower station were established along the Jianhe river The total installed capacity is 9608.5 kW.

The Longxu river section of Tiandong county was built in 1959 with a normal water storage capacity of 17 million cubic meters. Longxuhe hydropower station was built in 1964 with an installed capacity of 2 × 500 kW. In 1987, longxuhe II hydropower station was built with an installed capacity of 2 × 1250 kW. There are 478 water lifting projects along the river, such as power stations and water turbine pumping stations.

Main tributaries

Debao county section

The tributaries of Jianhe river in Debao county are as follows:

Najia River, originated near nianxitun, Najia Township, flows through Bari, nongtun, fuzuo, Najia, bashen, yitun, Lingling, Zurong and Tianzhuang, and flows underground to Pojian and valley. The flow is 26.5 km and the drainage area is 102.7 km2.

Naliuhe River, which originates from Najia township of hongniling mountains, flows from Dinglu to pieanjiatu mountain, flows through pientun, aitun, Nalu and Nawan, and then goes underground to longsangpo. The flow is 13.3 km, and the drainage area is 78.1 square km.

Tonghuai River, formerly known as tuoming River, originates from longbutun, Meiwei village, Xingwang Township, flows through Donge, mengtun, tonghuai, tangsha and naguantun, and flows into Jianhe river 0.5km to the east of Hongshan and naguangtun, Shangmao village, Ronghua Township, with a flow of 39.1km and a drainage area of 464.7km2.

Laopo river originates from the south of Liushi mountain, 1.5km north of laotun, Guofu village, Zurong Township, flows through laotun, Guofu, butun, Fuwan and Naliang, and finally flows into Jianhe river. The flow is 6.5 km and the drainage area is 20.7 km2.

Zhaiba River, which originates from Longtang and zuliutu mountain of Zurong Township in leigongling mountains, flows through Longtang, Pingmo, Bainong, lengtun, duolie and zhaibatun, absorbs Liuge water from the north in zhaibatun, flows through liufangtun, neitun and waitun of rongcun, and then flows into Jianhe river, with a flow of 20.8 km and a drainage area of 49.04 square km.

Dongjiang River originates from Heji and Dawang Tushan areas of Wuling mountains in Debao county. It flows through dawangwei, Dasheng, Zukang and Hongtang. It flows to the southwest of Guolai village in Dawang Township and to the west of shanghantun in Xiangdu Township in Tiandeng county. It flows back to the east of Dongjiang village in Ronghua township at batangtun, and flows through Dongjiang River Dongmu and dongmeitun reach pojiaotun of Dakun village and join Jianhe river, with a flow of 34.5 km and a drainage area of 140.3 km2.

Fuping River, originating from the inner station Tushan area of Huanglian mountain, flows through Dongzhan, niangui, banhe, Naxi and shangpingtun, converges with namo water at fupingwei, then flows westward, passes through Bami, Baijiao and Qiaotou Tun, and flows into Jingxi County one kilometer west of tuoliangtun. It flows 19.4 kilometers in Debao County, with a drainage area of 107.75 square kilometers.

Miaohuai river originates from Debao

Chinese PinYin : Long Xu He