Heishui River

Heishui River

Heishui river is a tributary of Zuojiang River in Xijiang River system. It originates from Dalongtan at the foot of the stone mountain to the east of Huanhe village, Xinjing Town, Jingxi City, Guangxi. It flows through Daxin County, Jiangzhou District and Longzhou County of Vietnam and Chongzuo City, Guangxi, and joins Zuojiang River at the junction of Mianhe village, Xiangshui Town, Longzhou county. The Heishui river basin covers an area of 6025 km2 (including 505 km2 in Vietnam), with an average annual runoff of 4.75 billion cubic meters and a river length of 192 km.

General situation of main stream

Heishui River, Zuojiang river system, Zhujiang River system, Xijiang River tributary, Yujiang River tributary, Zuojiang River tributary. It originates from the Dalongtan river at the foot of the stone mountain in the east of Huanhe village, Xinjing Town, Jingxi city. It flows southward and is named Longtan River. On the right side of shijiudu bridge, there is the inflow of Erquan River, hereinafter referred to as Nantan river. To the west of Yuewei Town, it flows into Vietnam in a tortuous way. There is a section of the boundary river between Vietnam and China. At Detian village, ShuoLong Town, Daxin County, it flows into the border of China and flows eastward for 19 kilometers. At nianditun, there is Xialei River (also known as Luoshui, upstream in Jingxi city), which is called Guichun River, hereinafter referred to as Heishui river. It passes through the south of Daxin County and flows to the southeast. It successively flows into naxiangshui River (Daxin River, converging from the left) and Mingshi River (converging from the right), with a length of 64.3 km. Pass Leiping Town, enter Jiangzhou District of Chongzuo City in kangbatun (flow 18.3 km), and enter nalanwei River (also known as Rongwei River) in Xinhe. Downstream, 12.5km is the boundary river between Jiangzhou District and Longzhou County of Chongzuo city. It flows into Zuojiang at the junction of Mianhe village, Xiangshui Town, Longzhou county. The Heishui river basin covers an area of 6025 km2 (including 505 km2 in Vietnam), with an average annual runoff of 4.75 billion cubic meters, a river length of 192 km and a river slope of 1.32 ‰.

Nantan reach

Nantan River, also known as Nantan water, originates from Dalongtan at the foot of the stone mountain to the east of Huanhe village, Xinjing Town, Jingxi City, Guangxi Zhuang Autonomous Region. Its upper source is Baibu spring water in the south of baibutun, Tongyuan village, Bameng township. In summer and autumn, the spring water gushes out of the ground into a river, flows through Tangma, Longgang, Dadao, lingai and other villages, with a length of about 8 km, and then flows into the karst cave to join with Baibu Dalongtan underground river. The underlying flow is about 10 km from Dalongtan, and the pool water flows south into Longtan River. In Wulong Village, near Shizishan, right napangling River, in Changfu village, West zuonaqulai River, to Aibu village, Huadong Town, right napangquan river. The following is called the Nantan river. In the southeast, it flows through Daxing village, Yuewei Township, to the border pillar 74 of doulunai, and flows into Vietnam, which is called Guichun river. Turning eastward, he turned to detiantun, ShuoLong Township, Daxin County, Guangxi.

Heishui reach

In nianditun, Daxin County of Guangxi Zhuang Autonomous Region, the Nantan River and Luoshui (Xialei River) converge, which is called Heishui river. It flows eastward through Naan, Anping and other places to geqiangtun and Lijiang River. It flows out of the county through Xinjian village of Leiping town and into Zuojiang River in Chongzuo county. The length of the river reaches through Daxin County is 45.5km, and the drainage area (within the county) is 2486.15km2.

In Jiangzhou District of Chongzuo City, heishuihe county has a total length of about 30.8 km. From Nali dam, which is 0.9 km west of Nali village, Xinhe Town, at the junction of Daxin County, it flows through Nali, Xincun, Buhua, Xinhe, Qinghe, Tongkang, Zuozi, Lanshan, dundong and other villages, then around tuotan, Nawu and other places in Xiangshui Township, Longzhou County, and finally flows into Zuojiang River in the west of tuohuai village, Heping Township, this county. The river boundary is about 13.3 km long.

In Longzhou County, through Xinhe Town, Jiangzhou District, Chongzuo City, it enters the natantun village, Gaofeng village, Xiangshui Township, and flows to the Mianjiang River to join the Zuojiang River, which is the natural boundary between Longzhou county and Jiangzhou District, with a flow length of 10.6 km.

To the junction of Mianjiang village and Jiangzhou District, Xiangshui Township, Longzhou County, Huiren Zuojiang.

General situation of River Basin

The upstream reach of Nantan river is 32 km long from Dalongtan to doulunai. It passes through Huanhe, Lianjie, nayao, Jipo, Wulong, Liangbiao, Changfu and Chengliang in Xinjing Town, bade, Minqiang, Huadong, Sanyou, Liangfeng and Aibu in Huadong town and Daxing in Yuewei town. Along the two sides of the river for the peak forest valley, there are relatively broad fertile fields. There are three consecutive falls in the river section to the west of Qiantun in Aibu village, forming a magnificent waterfall; there are continuous rapids in the river section below shiudu bridge, with spray and smoke all over the sky, and it is especially difficult for fish to cross, so it is called Nantan river. On the other hand, it is said that "Nan Tan" is the local Zhuang language, "Nan" is a cliff, "Tan" means grading, which means that the rocks in the middle of the river are as steep as a cliff, and they are several levels in succession, so it is named. The daxingcun reach is divided into 8 isolated beaches surrounded by water.

In Daxin County, Heishui River mostly flows through deep mountains and canyons, and the current is turbulent, forming many natural waterfalls and drop points. The main hydropower stations such as Naan and Zhongjuntan, and the main water conservancy projects such as Yuejin channel and naan channel are built on both sides of the river, irrigate more than 40000 mu of farmland, and have abundant fish reserves. It is said that the river is blue and black because of the reflection of the peaks on both sides. From upstream to downstream, the Heishui river flows through 65 villages, including niandi, Naan, Shangli, Xiali, Kedu, Anping, nongkan, Banka, luliu, Yee, Xunlong, Kangba, Xinmin and Xinjian.

hydrographic features

The control drainage area of upstream Nantan reach in Jingxi city is 1281km2, accounting for 38.5% of the total area of the county. Yuewei hydrological station was set up in 1958-1979 near the border of Vietnam. According to the measured data of the station, the average annual low flow is 2.59 cubic meters per second, and the average annual flow is 31.1 cubic meters per second. The maximum flood peak flow occurred on May 23, 1973, reaching 992 cubic meters per second. The average annual runoff depth is 767 mm, and the average annual runoff is 983 million cubic meters. Riverbed width: 20-80m in the upstream and 140m in the downstream; bank height: 1-3m. The natural drop of riverbed is 230m, the gradient is 7.19 ‰, and the theoretical reserve of hydraulic resources is 70171kw.

According to the observation of Naan hydrological station in Daxin County, the variation range between flood level and dry water level in 1968 is 9.29 meters, the maximum 24-hour peak flow is 2410 m3 / s, the minimum flow is 11.6 m3 / s, and the average annual flow is 83.7 m3 / s.

In Longjiang County, the rainfall area is 6557 square kilometers, the water depth is 3.63 meters, the river width is 54.2 meters, and the flow rate is 0.49 m3 / s. The annual maximum discharge is 3710 m3 / s, the average discharge is 135 m3 / s, the minimum discharge is 7.42 m3 / s, the annual runoff is 4.263 billion m3, the highest water level is 20.16 m, the lowest water level is 10.56 m, the natural drop is 23 m, the water energy reserve is 14800 kW, and the utilization capacity is 5600 kW, which has not yet been developed and utilized. Because of the rapidity of the beach, only bamboo rafts and small wooden boats can be used.

Heishui river is located in Jiangzhou District of Chongzuo city. The riverbed is 140 meters wide (referring to the section of jinxinhe hydrological station, the same below). The drainage area is 6557 square kilometers. The maximum flow is 3710 m3 / S (measured in 1968), and the minimum flow is 6.06 m3 / S (measured in 1963). The average gradient is 0.0015.

General situation of water conservancy

There are Dalongtan power station with an installed capacity of 250 kW along the upstream Nantan reach (due to the leakage of the reservoir, it could not generate electricity by the end of the 20th century); Aibu I power station with an installed capacity of 600 kW; Aibu II power station with an installed capacity of 1260 kW; Aibu III power station with an installed capacity of 600 kW; aitun power station with an installed capacity of 250 kW. In addition, there are 28 small hydropower stations with a total installed capacity of 100 kW and abnormal operation, with an installed capacity of 263 kW. A total of 3223 kW has been developed and utilized. Sanyuan, Yunlei, Erlang, Daxing and other highway bridges are built on the river.

In Jiangzhou District of Chongzuo City, Nali dam and Xinhe hydropower station are built in the river. The river bed is mostly limestone, with many rapids and abundant water resources. About 11750 kilowatts of hydropower can be developed and utilized, and the irrigation area is more than 9000 mu. It's not navigable. The river is rich in Aquilaria odorifera.

Main tributaries

Jingxi County

Pangling river originates from Pangling village, Xinwei Township, Jingxi City, at the foot of the North Stone Mountain of butun, and gets its name from Pangling village. In ancient times, it was called nonglishui, "nongli" was transliterated in Zhuang language, meaning banyan dense. The source is a rising spring, which is the outlet of Longlin toubu underground river. It flows from the northwest to the southeast, passing through 7 Village streets of Xinwei, Xinjing, Pangling, Xinrong, Wanji, Qirong, Chongde, Jipo and Wulong. It joins Longtan River on the upstream of Nantan River from the right side near Shizishan of Wulong Village, with a river length of 16 km and a drainage area of 550 square km. The annual average runoff is 385 million cubic meters.

E-quan river originates from nianantun West, e-quan village, Xinjing Town, Jingxi City, and gets its name because it originates from e-quan. E-quan is a rising spring, which is the outlet of lingzhun-e-quan underground river. From northwest to Southeast, Liushi, nongyintun and Luolong village turn southward and flow eastward. Along the way, it passes through four townships and towns of Xinjing, Dizhou, Renzhuang and Huadong

Chinese PinYin : Hei Shui He