Main tributaries of Nanliu River

The Nanliu River has 14 first-level tributaries with a drainage area of ??more than 100 square kilometers. Among them, the Wuli River, which originates from the eastern foothills of Luoyang Mountain in Fuwang Township, Pubei County, is the largest, with a drainage area of ??1,222 square kilometers, a multi-year average annual runoff of 980 million cubic meters, a river length of 120 kilometers, and a river slope of 0.54%. , merges into Nanliu River from the right at the bottom of the river in Hepu County. Majiang (also known as Xiaojiang), which also originates from the foothills of Luoyang Mountain in Fuwang Township, is the second largest tributary of the Nanliu River. It has a drainage area of ??920 square kilometers, an average annual runoff of 750 million cubic meters over the years, a river length of 93 kilometers, and a sloped river course. It drops by 0.68‰ and merges into the Nanliu River from the right at the junction of Pubei and Bobai.

Beiliu City, the tributaries that merge into Nanliu River are:

Liuyang River (called Green Blue Water in old records). It originates from Lianhuading in Darong Mountain, with a drainage area of ??193.9 square kilometers. The river elevation is 84 meters and the natural drop is 396 meters. The maximum flow is 715 cubic meters per second, the minimum flow is 0.33 cubic meters per second, the annual average flow is 6.15 cubic meters per second, and the annual runoff is 257.11 million cubic meters. The theoretical hydraulic reserve is 10,530 kilowatts, the planned development power is 5,090 kilowatts, the developed power is 1,565 kilowatts, and the effective reservoir capacity of the built reservoir is 30.54 million cubic meters. The total length of the river is 22.8 kilometers, flowing through Dache, Xi'an, Pingshan, Pingdishan, Xicheng and Xinxu Town's Wucun, Shatang, Nansheng, Xiapou, Pinganshan and other villages, and ends at Heshuikou and The Baijiu River intersects, flows into Yulin City through Taoshan, and merges into the Nanliu River.

Baijiu River. It originates from the Tuzhu Water in Darong Mountain, with a basin area of ??46.7 square kilometers. The river elevation is 85 meters and the natural drop is 249 meters. The maximum flow is 356 cubic meters per second, the minimum flow is 0.08 cubic meters per second, the average annual flow is 1.45 cubic meters per second, and the annual runoff is 60.6 million cubic meters. The theoretical hydraulic reserve is 1,080 kilowatts, the planned power generation capacity is 730 kilowatts, and the developed power generation is 390 kilowatts. The effective storage capacity of the built reservoir is 750,000 cubic meters. The total length of the river is 14.2 kilometers, flowing through Xiaoma, Liudui and Luoyang in Dali Township and Liuwang, Songcun, Baijiu River and Ping'an Mountain in Xinwei Town. It joins the Liuyang River at Heshuikou of Ping'an Mountain. It flows into Yulin City and merges into Nanliu River.

Qingwan River. It originates from the Three-fork Water Fairy Bridge in Darong Mountain, with a drainage area of ??85.5 square kilometers. The river elevation is 86 meters and the natural drop is 514 meters. The maximum flow is 556 cubic meters per second, the minimum flow is 0.15 cubic meters per second, the annual average flow is 2.71 cubic meters per second, and the annual runoff is 113.37 million cubic meters. The theoretical hydraulic reserve is 10,770 kilowatts, and the developed electricity is 22,662 kilowatts (ie Darongshan Hydropower Station). The effective storage capacity of the planned reservoir is 29.7 million cubic meters, and the effective storage capacity of the built reservoir is 20.4 million cubic meters. The total length of the river is 21.7 kilometers, flowing through the villages of Lindong, Liuma, Liuhou, Guhong, Luopo, and Dali, into Yulin City, and into the Nanliu River.

Tang'an River. It originates from Changtang Village, Tang'an Town, with a drainage area of ??39.7 square kilometers. The river elevation is 85 meters and the natural drop is 40 meters. The annual average flow rate is 1.27 cubic meters per second, the annual runoff volume is 48.67 million cubic meters, the planned effective reservoir storage capacity is 3.08 million cubic meters, and the built reservoir effective storage capacity is 3.08 million cubic meters. The river is 8.8 kilometers long, flowing through Changtang, Liuhe, Limin, Tang'an, Liangting and other villages, flowing into Yulin City and converging into the Nanliu River.

Nanliu River is the largest river in Yulin City. The main tributaries are:

The Ludong River and the secondary tributary of the Nanliu River. The second source comes from Daniuling and Changtang in Beiliu City. Enter the city at Tang'an, Beiliu City. It passes through Maolin Town and enters the Nanliu River in Shuiche Village. The river is 20 kilometers long and 10 kilometers long in the city. Traffic is small.

Liuzhu Water is a first-level tributary of Nanliu River. It originates from the foot of Daling in Changle Village and enters the Nanliu River at Liuzhu Slope. The river is 4 kilometers long. The river is 30 meters wide and 1500 millimeters deep. Traffic is small.

Wangjiang River, also known as Qingwanjiang River, is a first-level tributary of Nanliujiang River. It originates from Meihuading, the main peak of Darong Mountain, enters the city at Masai Village, Beiliu City, passes through Mingshan, Chengbei, Yucheng, Chengxi, Fumian and other streets (towns), and ends at Yushan Bridge where it enters the Nanliu River. The basin area is 239.9 square kilometers, the river is 44 kilometers long, and it is 37.9 kilometers long in the city. The river bed is 74.59 meters above sea level. The slope drop is 5.11%, the river width is 30 meters to 40 meters, and the river depth is 1000 mm to 2000 mm.

The peak flow is 873.5 cubic meters/second, the average flow in wet years is 10.9 cubic meters/second, the average flow in dry years is 4.46 cubic meters/second, and the average annual runoff is 244 million cubic meters. The available water energy reserve is 2,600 kilowatts. There are 2 medium-sized reservoirs (Suyan and Hanshan), 3 small (I) reservoirs, 15 small (II) reservoirs, 4 Piba dams, and 4 small hydropower stations with a capacity of 525 kilowatt.

Dengjiang is a secondary tributary of Nanliujiang River. It originates from Dayan, Lvrong and other places, reaches Datang and enters Beiliu City where it joins Qingwan River. The river is 12.5 kilometers long and the city is 4.5 kilometers long. The river width is 10 meters to 20 meters, and the river depth is 500 mm to 1000 mm. There are 1 medium-sized reservoir (Suyan), 2 small (I) reservoirs (Sanhe, Liangtian), and 2 small hydropower stations built in the upstream.

Daliang River is a secondary tributary of Nanliu River. The source betrayed Guanshan'ao, a wine town, and entered the Luowang River in Nanliu Village. The basin area is 50.8 square kilometers, the river is 16.6 kilometers long, the slope is 0.42%, the river width is 20 meters to 30 meters, and the river depth is 300 mm to 1000 mm. The peak flow is 115.96 cubic meters/second, the average flow in wet years is 1.88 cubic meters/second, the average flow in dry years is 0.77 cubic meters/second, and the average annual runoff is 042 million cubic meters. There are 2 Piba dams (Wenta Pi and Dongchongpo).

Fushui River is a secondary tributary of Nanliu River. It originates from Hanshan Mountain, reaches the upper reaches of Xiwang Bridge and enters the Luowang River. The river is 13 kilometers long. Traffic is small. There are two small Pi dams (Chen Du Pi and Xi Pi).

Sanshan River, also known as Rendong River, is a secondary tributary of Nanliu River. Originates from Hanshan Mountain. It meets the Liuliao River in Liangcun, Rendong Town, passes through Shidi and joins the Zhangdaoyan Mountain Pass River, then passes through Shishan and joins the Bai [氵Chan] Water, and then reaches the Baijiu Bridge where it enters the Luowang River. The basin area is 91.1 square kilometers. The river is 22 kilometers long and has a gradient of 4.7%. The river width is 10 meters to 25 meters, and the river depth is 500 mm to 1000 mm. The peak flow is 208.8 cubic meters/second, the average flow in wet years is 3.38 cubic meters/second, and the average flow in dry years is 1.38 cubic meters/second; the average annual runoff is 79.0 million cubic meters. There are 1 medium-sized reservoir (Hanshan), 1 small-sized reservoir (Liangshuitang), and 4 Piba dams (Sanshan, Egong, Huangbu, and Baijiu).

Dingchuan River, also known as Chepi River, is the largest tributary of Nanliu River. It originates from Duchong, Xiaxia, Kuiyang Town, joins the Jiupi River in Xidou, reaches the center of the river, joins the Shuangfeng River, reaches Qichong Village, joins the Qichong River, and joins the Yaqiao River in Gucheng Village, Chengdu Town. The upper section of the confluence is called Mingshui River, and the lower section is called Dingchuan River. It collects water from the Yellow River to Tongcao Village and flows into the Nanliu River through Wanji Bridge to the Fumian Town dock. The basin area is 673.4 square kilometers. The river is 63 kilometers long, with a water level of 71.15 meters, a gradient of 1.52%, a width of 100 meters to 120 meters, and a depth of 1000 mm to 1500 mm. The peak flow is 1543 cubic meters/second, the average flow in wet years is 25 cubic meters/second, the average flow in dry years is 10.23 cubic meters/second, and the average annual runoff is 560 million cubic meters. The available water energy reserve is 10,700 kilowatts. There are 3 medium-sized reservoirs, 12 small (I) type reservoirs, 18 small (II) type reservoirs, 19 water diversion projects and 20 small hydropower stations in the basin.

Yaqiao River is a secondary tributary of Nanliu River. The upper reaches of the Dangzhou River and the Beiqingshui River merge into the Yaqiao River in Tengchong Village, Long'an Township. Arrive at Chetian Village and enter the Dingchuan River. The basin area is 166 square kilometers. The river is 40.4 kilometers long, with an altitude of 70.7 meters at the bottom, a slope of 2.38%, a width of 40 meters, and a depth of 600 millimeters. The peak flow is 380 cubic meters/second, the average flow in wet years is 6.16 cubic meters/second, the average flow in dry years is 2.52 cubic meters/second, and the average annual runoff is 138 million cubic meters. There are 5 small (I) type reservoirs (Rongtang, Jinji, Wangchong, Liuhuo, Longqingjiang), 4 small (II) type reservoirs and 6 water diversion projects.

Dangzhou River is a third-level tributary of Nanliu River. It originates from Gaoyingding in Xiaopingshan Township and enters Yaqiao River in Tengchong Village. The river is 22 kilometers long, 10 meters to 20 meters wide, and 500 mm to 1000 mm deep. There is one Piba (Long'an) built.

Beiqingshui River is a third-level tributary of Nanliu River. It originates from Lvjiu and Huatang Villages in Luoyang Township, flows through Huiwangchongshui in Luowang Village, and enters the Yaqiao River at Sanjiang Bridge. The river is 11 kilometers long. The river width is 3 meters to 6 meters, and the river depth is 600 mm to 1000 mm. There is one Piba (Sanhepi) and two small (I) reservoirs (Jinjichong and Wangchong).

Shabu River is a third-level tributary of Nanliu River. It originates from Si Xing Mountain, ends at Long'anwei and enters the Yaqiao River. The river is 6 kilometers long, 5 meters to 7 meters wide, and 400 mm to 500 mm deep. There is one small (1) type reservoir (Liuhuo).

Xishui River, also known as Shuangfeng River, is a secondary tributary of Nanliu River that originates from Liuwanshan Liucun, Liangning, Shegang and other places, and reaches Nancun and joins Mingshui River in the upper reaches of Chepi River. The basin area is 132 square kilometers. The river is 23.6 kilometers long. The slope is 5.01%, the river width is 20 meters to 30 meters, the river depth is 500 mm to 1000 mm, the peak flow is 302.5 cubic meters/second, the average flow in wet years is 4.9 cubic meters/second, and the average flow in dry years is 2.0 cubic meters/second. , with an average runoff of 110 million cubic meters: 2 medium-sized reservoirs (Tiedian, Liyuwan), 2 water diversion projects (Fenggangpi, Xijiangpi), and 4 hydropower stations (Liyuwan, Dongkou 1 Shaping, Tiedian) .

Qichong River is a secondary tributary of Nanliu River. It originates from Shilu Village, Chengjun Town, and ends at Qichong Village, where it enters the Mingshui River in the upper reaches of the Chebei River. The basin area is 27.6 square kilometers. The river is 7 kilometers long. The peak flow is 63 cubic meters/second, the average flow in wet years is 1.02 cubic meters/second, the average flow in dry years is 0.42 cubic meters/second, and the average annual runoff is 22 million cubic meters.

Duhuang River, also known as Chengjun River, is a secondary tributary of Nanliu River. It originates from the Lotus Peak of Liuwan Mountain and reaches the Jiangkou Reservoir. Basin area, 67.4 square kilometers. The river is 22 kilometers long, with a gradient of 8.42%, a peak flow of 154 cubic meters/second, an average flow of 2.5 cubic meters in wet years, an average flow of 1.024 cubic meters/second in dry years, and an average annual runoff of 56 million cubic meters.

Lijiang is also known as Qiao Lijiang, Xinqiao River, and is a first-level tributary of Nanliu River. It originates from Fenghuangling in Luchuan County and enters Jingdong, Mapo Town. Pass through Xinqiaowei to Litouzui and enter the Nanliu River. The basin area is 498.4 square kilometers. The river is 51 kilometers long. It is 15.05 kilometers long in the city, with a water level of 89.9 meters, a slope of 1.40%, a river width of 25 meters, and a river depth of 1000 mm-1200 mm. The peak flow is 1142 cubic meters/second, the average flow in wet years is 18.49 cubic meters/second, the average flow in dry years is 7.57 cubic meters/second, and the average annual runoff is 414 million cubic meters. The available water energy reserve is 0.06 million kilowatts. There are 2 small (1) type reservoirs (Yunmaoyi and Lipu'an), 3 water diversion projects, and 1 central electric irrigation station.

Shashengjiang River, also known as Taipingjiang River, is a first-level tributary of Nanliujiang River. It originates from the top of 60,000 Wasabi Fans, passes through Dachong and collects silver water, reaches Dalvqiao and joins Gulongjiang River, and flows into Nanliujiang River at Jiangkou Village. The basin area is 80.03 square kilometers. The river is 33 kilometers long and has a slope drop of 8.28%. The peak flow is 183.3 cubic meters/second, the average flow in wet years is 2.97 cubic meters/second, the average flow in dry years is 1.21 cubic meters/second, and the average annual runoff is 67 million cubic meters. The available water energy reserve is 3,000 kilowatts. There are 4 water diversion projects built and 4 small hydropower units with a capacity of 972 kilowatts.

Wanglaojiang is a first-level tributary of Nanliu River. There are two sources: one starts from Shilongding of Liuwanshan Mountain, goes to Wanglaoshan to collect Ludang Water, and flows into Nanliujiang River at Guiyuanpo; Shanhui Wanglaojiang. The basin area is 98.6 square kilometers. The slope is 11.9%. The peak flow is 226 cubic meters/second, the average flow in wet years is 3.66 cubic meters/second, the average flow in dry years is 1.5 cubic meters/second, and the average annual runoff is 82 million cubic meters. The available water energy reserve is 3,900 kilowatts. There are 1 medium-sized reservoir (Luotian), 5 small (II)-sized reservoirs, 1 Piba, and 7 small hydropower stations with a capacity of 3375 kilowatts.

Shedong River is a first-level small tributary of Nanliu River. It originates from Tao Niupo in Gaosha, Zhangmu Town, and flows into the Nanliu River in Ruidong. 4 kilometers long.

Sulijiang is a first-level tributary of Nanliujiang River. The two sources both come out of Shihe Township. One comes out of Shuiwei Village in Dayi (called Dajieshui), and is injected into ***he Reservoir in Shimen Village, and ends at Dapo Village where it meets the Liujiang River. The other comes out of Jilongling (called Liujiang River) and ends at Longbantang. It merges with the General Assembly Water and is called Sulijiang River. It passes through Suliwei to Jianglianpo and enters the Nanliu River. The basin area is 57.98 square kilometers. The river is 23 kilometers long and has a gradient of 1.98%. The peak flow is 132.9 cubic meters/second, the average flow in wet years is 2.15 cubic meters/second, the average flow in dry years is 0.88 cubic meters/second, and the average annual runoff is 048 million cubic meters. The available water energy reserve is 0.03 million kilowatts.

There are 1 medium-sized reservoir (***he) and 2 small (1)-sized reservoirs (Wangjiu and Dayi).

Liushijiang is a first-level tributary of Nanliujiang River. It originates from Shutougang, Shatian Township, and flows into Nanliujiang River at Liusi Village. The basin area is 53.25 square kilometers. The river is 17 kilometers long and has a gradient of 7.21%. The peak flow is 122 cubic meters/second, the average flow in wet years is 1.97 cubic meters/second, the average flow in dry years is 0.81 cubic meters/second, the average annual runoff is 044 million cubic meters, and the available water energy reserve is 0.07 million kilowatts. There is a water diversion project built.

Shatian River is a first-level tributary of Nanliu River. There are three sources: they all come from Luchuan County, one comes from Yangjia, the second comes from Chenopodium, and the third comes from Niuweiling, and they converge to Shuizhenlu Village in Bobai County and enter the city. The basin area is 293.8 square kilometers, the river is 40 kilometers long, and it is 18 kilometers long in the city. The water level is 72 meters, the slope is 3.12%, the river width is 55 meters, and the river depth is 800 mm. The peak flow rate is 673.8 cubic meters/second, the average annual traffic flow is 12.91 cubic meters/second, the average low water flow rate is 4.47 cubic meters/second, and the average annual runoff is 249 million cubic meters. The available water energy reserve is 0.13 million kilowatts. There is one water diversion project (Shatian Dam) and two hydropower stations with an installed capacity of 17 kilowatts.

Liudajiang River is a secondary tributary of Nanliujiang River. It originates from Liuda Village, Zhangmu Town, enters Shuangfeng, Bobai County, meets the Liuzhu River, reaches Shalang, and enters the Nanliu River. The river in the city is only 1.8 kilometers long.

There are 30 tributaries of the Nanliu River in Bobai County. Among them, the ones east of the Nanliu River include Heshui River, Zhoucun River, Wudou River, Xiaobai River and Qinghu River. , Yashan River, Baihua River, Hejiang River, Xinzheng River, Xialing River, Anchong River, Yangyun River, Wumu River, Liyang River, Longdong River, etc. 15; located to the west of Nanliu River are Chunshi River, Luzhu River, Shuijiang River, etc. There are 15 rivers including Ming River, Xidong River, Shangbao River, Xiabao River, Dungu River, Lincun River, Shanqiao River, Daren River, Jinzhen River, Jiangning River, Muwang River, Shuangshan River and Dapi River. The longest tributary reaches 45 kilometers, the shortest is only 4 kilometers, and the largest average flow rate for many years reaches 19.4 cubic meters per second.

Heshui River is one of the main tributaries of Nanliu River. It originates from Hushuang Village in Chengxiang Township and flows through Jiulong Village into the Nanliu River. It has a total length of 15 kilometers, a rain collection area of ??130.4 square kilometers, an average annual runoff of 178 million cubic meters, and a multi-year average flow of 5.8 cubic meters per second. 41 water conservancy facilities have been built. Among them, there are 8 water storage projects, 30 water diversion projects, and 3 water lifting projects. The theoretical water energy reserve is 1,483 kilowatts, of which 1,310 kilowatts can be developed and utilized, and 162 kilowatts have been developed and utilized.

Green Pearl River is one of the main tributaries of Nanliu River. It was named because Liang Luzhu’s hometown is located in the upper reaches of the river. It originates from Shuangfeng Township, flows through Langping and Kemu Townships, and enters the Nanliu River. It has a total length of 45 kilometers, a rainwater collection area of ??341 square kilometers, a multi-year average flow of 11.4 cubic meters per second, and an average annual runoff of 358 million cubic meters. 6 water conservancy facilities have been built, including 1 water storage project and 5 water diversion projects. The theoretical reserves of water energy are 6,082 kilowatts, and the developable capacity is 6,082 kilowatts. The Green Pearl River Power Station, Chongsu Power Station, and Yuetian Power Station have been built. Datian Power Station is under construction, and 6,358 kilowatts have been developed and utilized.

The Yashan River was called the Dabai River in ancient times. It is one of the main tributaries of Nanliu River. It originates from Huangling Township, flows through Sandan Town and Yashan Town, and enters the Nanliu River. It has a total length of 30 kilometers, a rainwater collection area of ??235.1 square kilometers, a multi-year average flow of 7.8 cubic meters per second, and an annual runoff of 247 million cubic meters. . There are 140 water conservancy facilities built, including 27 water storage projects, 110 water diversion projects and 3 water lifting projects. The theoretical reserves of water energy are 5,304 kilowatts, the developable capacity is 4,882 kilowatts, and 1,492 kilowatts have been developed and utilized.

Shuiming River is one of the main tributaries of Nanliu River. It originates from Yong'an Township, flows through Shuiming Town, Dali Township, and enters the Nanliu River, with a total length of 30 kilometers, a rainwater collection area of ??173.8 square kilometers, and a multi-year average flow of 5.8 cubic meters per second. The annual runoff is 183 million cubic meters. There are 57 water conservancy facilities built, including 17 water storage projects, 28 water diversion projects, and 12 water lifting projects. The theoretical reserves of water energy are 3,582 kilowatts, the developable capacity is 3,703 kilowatts, and 598 kilowatts have been developed and utilized.

Hejiang River is one of the main tributaries of Nanliu River.

It originates from the foothills of Mazizhang Mountain, Hefeng Mountain and Xintian, flows through Dongping Town and Hejiang Township, and enters the Nanliu River. It has a total length of 33 kilometers, a rainwater collection area of ??596.6 square kilometers, a multi-year average flow of 19.4 cubic meters per second, and an annual runoff of 6.12 billion cubic meters. 468 water conservancy facilities have been built, including 261 water storage projects, 189 water diversion projects, and 18 water lifting projects. The theoretical water energy reserves are 9,030 kilowatts, the developable capacity is 3,790 kilowatts, and 1,478 kilowatts have been developed and utilized.

Jiangning River is one of the main tributaries of Nanliu River. It originates from Nalin Town, flows through Jiangning Township, and enters Hepu Reservoir. The length of the county is 31 kilometers, the rainwater collection area is 161 square kilometers, the annual average flow is 5.23 cubic meters per second, and the annual runoff is 165 million cubic meters. There are 54 water conservancy facilities built, including 31 water storage projects. The theoretical reserves of water energy are 3,764 kilowatts, the developable capacity is 3,316 kilowatts, and 1,242 kilowatts have been developed and utilized.

The tributaries that merge into the Nanliu River in Pubei County include: The first-level tributary of the Nanliu River in the Wuli River originates from Sheerling in Fuwang Township and flows through Sanhe from north to south via Fuwang Guli. , Beitong, Baishishui, Wuli, Wenli in Lingshan County and Dacheng Township in the county, and merge into the Nanliu River at Hepu Duojiao. The river in the county is 112 kilometers long. It is located above Yangjiaotan in the county. The rainwater collection area is 1222.5 square kilometers (532.2 square kilometers in the county). The average width of the river is 78 meters. The natural drop is 374 meters. The average slope is 3.34‰. It is long in the county. There are 15 tributaries over 5 kilometers long, with a total length of 297.3 kilometers. The measured maximum flow rate is 690 cubic meters per second. The average minimum flow rate for many years is 2.75 cubic meters per second. The average flow rate over the years is 23.6 cubic meters per second. The river beds in the hilly areas are low and deep, including the famous Yangjiao Beach and Dilong Beach, with rapid water flow. Before liberation, residents on both sides of the Taiwan Strait relied on more than 300 bamboo waterwheels to carry water for irrigation. Boats and bamboo rafts along the river could reach Wuli all year round. 30-ton ships sailed from Hepu Duojiao to Wuli in Lingshan all year round. After liberation, permanent embankments were built year by year and various types of water wheel pumps were installed to replace the bamboo tube water for irrigation. From 1980 to 1989, 52 small electric irrigation stations were built with a total installed capacity of 290.5 kilowatts, making it a double-insurance water-lifting irrigation project. There are also 2 small type II livestock water projects, 10 small type II reservoirs and 142 mountain ponds in the basin. After 1970, the permanent dam of Baishi Water Pumping Station was built and the Yangjiaotan Dam was built, and the Wuli River was no longer navigable.

Xiao Jiang is also called Ma Jiang. It is a first-level tributary of Nanliu River. Dashuangshuiwei originates from Fuwang Township in the county, flows through Fuwang, Jiangcheng, and Zhangjia Township and flows into Hepu Reservoir. The main stream is 78 kilometers long.

There are 13 tributaries with a length of more than 5 kilometers in the county, with a total length of 215 kilometers, a total rainwater collection area of ??500.6 square kilometers, a drop of 449.5 meters between the beginning and end of the river, and an average slope drop of 5.76‰. According to actual measurements in 1958, the river downstream was wider 100 meters, 80 meters in the middle reaches, 0.3-0.5 meters in the upper reaches, and the average width of the basin is 7.9 kilometers. The historical maximum flood flow was 453 cubic meters per second. The multi-year average minimum flow rate is 0.184 cubic meters per second, and the multi-year average flow rate is 5.63 cubic meters per second. Before liberation, wooden boats of 5 to 10 tons often sailed to Xiaojiang. Along the river, bamboos and trees were lined up and flowed down to Hepu and Beihai. There were 415 wooden piles and bamboo waterwheels were used to lift water for irrigation. After liberation, in addition to the Xiaojiang Reservoir built in the lower reaches to become the reservoir area, 16 water pumping stations were built along the river in the middle reaches and above. The water storage projects include Small Type 1 Longzhen Genshan Reservoir, Jiangcheng Longtou Reservoir, and 5 small Type II reservoirs. There were 95 cases in Tangba. After 1975, 34 electric irrigation stations were built to replace water wheel pump irrigation projects. Since the construction of the Xiaojiang Reservoir in 1958, the Xiaojiang River has become unnavigable.

Zhanghuangjiang, a first-level tributary of Nanliujiang River, originates from Dapo in Jinglong Town Township and Daluoling in Xintian. The two sources merge to form the upstream Longmen River, which flows through Longmen to Liantang Hejiang Estuary and merges into the Maojia River. After the merge, it flows into the low-lying basin Jiangbu, then flows into the Miaobei of Zhanghuangjing to receive the Malan River, and reaches Longwan where the Liuluo River flows in. It flows through Zhanghuang to the Jiuzhou River estuary where the spring water flows into the Nanliu River. The total length of the river is 54 kilometers, and there are 10 tributaries with a length of more than 5 kilometers. The total length is 140.4 kilometers, the total rain collection area is 424.2 square kilometers, the natural drop is 84.3 meters, the average slope is 1.21‰, the downstream of the river bed is 85 meters wide and the water depth is 1.0 meters, the middle reaches is 40 meters wide and the water depth is 1.4 meters, the upstream is 25 meters wide and the water depth is 0.5 meters. rice. The maximum flow rate of Zhanghuangjiang River is 313 cubic meters per second.

The multi-year average minimum flow rate is 1.25 cubic meters per second, and the multi-year average flow rate is 10.59 cubic meters per second. The average annual runoff is 334 million cubic meters. Before liberation, 30-ton ships were navigable to Zhanghuang. Bamboo rafts along the river could be navigable all year round, relying on 324 wooden piles and bamboo tube waterwheels to lift water for irrigation. After liberation, 18 permanent mortar masonry dams were built along the river, and 49 water pumps of various types were installed. After 1980, 26 electric irrigation stations were built on both sides of the river with an installed capacity of 127 kilowatts, becoming a double insurance for water pumping and irrigation. . The water storage projects in the basin include 6 small type 1 Liufengshan reservoirs, 6 small type Ⅱ reservoirs, and 144 ponds and dams. After 1958, due to the increase in waterwheels and dams, the Zhanghuang River was no longer navigable.

Pingmu River is a tributary of the Green Pearl River and is located in Pingmu Township. It originates from Shudoulu and flows to Jiajiang River in Bobai County. The county has a rainwater collection area of ??72.3 square kilometers, a river length of 18 kilometers, a maximum flow of 53.5 cubic meters per second, a minimum flow of 0.213 cubic meters per second, and an annual runoff of 57.7 million cubic meters. The total exploitable hydropower resources are 300 kilowatts, of which 290 kilowatts have been developed.

Liufeng River is a tributary of the Green Pearl River and is located in Pingmu Township. It originates from the large water table and flows to the sandy soil of Bobai County. The county has a rainwater collection area of ??46.9 square kilometers, a river length of 13 kilometers, a maximum flow of 34.5 cubic meters per second, a minimum flow of 0.138 cubic meters per second, and a multi-year average runoff of 37.2 million cubic meters. The total exploitable hydropower resources are 250 kilowatts.

In Hepu County, Nanliu River starts below Changlewei. Along the north bank, there are Chebanjiang River, Wuli River, Hongchao River, Baisha River (Shagang) and Dagou River. On the south bank, there are Yama River and Er River. Bushui, Qilijiang and Qingshui rivers merge into it.

The Wuli River originates from Shegui Ridge in Fuwang, Pubei County, flows south along the boundary between Pubei and Lingshan, flows into the county at Datian, Shiwan Town, and flows south to Fubu, Shikang Town, where it joins the South Flowing river. The main stream is 120 kilometers long, and the river section in the county is 13.3 kilometers long. The drainage area is 1,222 square kilometers, and the county’s drainage area is 61.8 square kilometers. The average flow rate over the years is 30.8 cubic meters per second. The river section in the county can develop 500 kilowatts of hydropower resources. The width of the river gradually widens from north to south, about 100 to 180 meters in flat water period. The river in the northern section is deeper, about 2-3 meters, while the southern section is less than 1 meter. Beaches on both sides of the strait are distributed intermittently, ranging from tens to more than a hundred meters wide. Before 1960, 40-ton wooden boats could sail from the Wuli River Estuary to Wuli, Lingshan, and small wooden boats could sail to Pubei Beitong. In 1965, the water turbine pumping station was built in Zhongzhi, Changle Town, and the service was discontinued.

The Hongchao River originates from Hegui Mountain in Lingshan County. After converging with several secondary tributaries, it flows south to the junction of Shiwan and Wujia in the north of the county. Then go south for about 15 kilometers to the spider slope west of Qingshui Village in Shiwan, where it joins the Nanliu River's Gong'etan branch, then turns southwest for about 8 kilometers, passes to the southeast of Shangyangwei, and joins the Nanliu River at the south of Shagang Tianliao Village via the 750 artificial river channel. The main stream of the river. Before 1967, it flowed through the north and west of Tianliao Village, then meandered southwest for about 15 kilometers to the northern area of ??Shagang and merged into the Nanliu River.

The main stream of Hongchao River is 106 kilometers long and has a drainage area of ??458 square kilometers. The river section at the county boundary is 23.3 kilometers long, with a drainage area of ??90.5 square kilometers and a developable hydropower resource of 0.36 million kilowatts. The average annual flow rate is 11.5 cubic meters per second. There are large reservoirs built in the junction area of ??Hepu, Lingshan and Qinzhou in the middle reaches, and most of the river water is impounded during non-flood periods. During the flat water period, the water surface of the river north of Qingshui Village is more than 10 meters or even dozens of meters wide and 0.4-0.5 meters deep. The river channel after converging with the Nanliu River has been preliminarily renovated. The distance between the embankments on both sides is about 250 meters. During the normal water period, the water surface is tens of meters and the water depth is less than 1 meter. During the flood period, 23% of the water in the main stream of the Nanliu River is discharged. The safe flood discharge capacity designed for river regulation is 1,800 cubic meters per second. The main highway from Nanning to Beihai crosses the river in the east of Shangyangwei, and there is a Shangyang Highway Bridge. Before 1960, ships of 10-20 tons could go up the river to Shengping, Lingshan County. The Hongchaojiang Reservoir has been closed since its completion.

The Baisha River (Shagang) originates from the north of Wanglaoshan Village in Wujia, flows south to the east of Baishajiang Village in Shagang, and joins the old Hongchao River. Then it goes southwest along the old road and joins the Nanliu River through the North Domain Control Gate. Yu Liu. The basin area is 52.3 square kilometers, the main stream is 18.6 kilometers long, and the average annual flow rate is 1.31 cubic meters per second. The flat river in Shagang is 30-50 meters wide and 0.3 meters deep. The mesa along the river suffers serious water and soil erosion, and the river floodplain is covered with accumulated sand. When there is no rain, the water surface only accounts for a small part of the river floodplain. After heavy rain, the river water surges and falls, causing a large amount of sedimentation. There is a barrage in the middle reaches; water can be diverted to irrigate farmland during the dry season.

The Yama River originates from Shagongling Village, Quzhang Township, and merges with many small streams in the northeastern hills of the county to the west, east of Changle Town, and divides into three branches near Sanjiangkou Village, Liannan, Changle Town , respectively merge into the Nanliu River in Liannan, Changle Town, Shuichuan, Shikang Town, and Songshuyuan Village. The main stream is 22.4 kilometers long, with a basin area of ??76.5 square kilometers and an average annual flow of 1.93 cubic meters per second. The middle and lower reaches of the river are 20 to 30 meters wide and 0.4 to 0.9 meters deep. There is a Pi Dam in Shicheng, Changle Town in the middle reaches, which can irrigate more than 3,000 acres of farmland.

The Qingshui River originates from the hills west of Dongchong Village, Hongbei City, Shikang Town, merges with many small rivers in the northwest of Qingshan Ridge, flows west through the hills and plains east of Huancheng, and ends at Gaoqiaotou Village, Qingjiang Village Office, Huancheng Nearby it merges into the Nanliu River and Zhoujiang Branch. The main stream is 13.2 kilometers long, with a basin area of ??110.4 square kilometers and an average annual flow rate of 2.77 cubic meters per second. The Qingshui River Reservoir has been built in the middle reaches. Most of the flow is usually intercepted to store water for irrigation. The water surface where it merges into Zhoujiang River is several meters wide and 0.2 meters deep.

Dagoujiang River, also known as Zhijiang River, originates from the east of Lingcun on the side of Wujia Lingding Village Hall. It merges with several small rivers in the northwest hilly areas and flows southward, passing through the south of Wujia and the east of Xichang Town. The pier in the southeast of Changzhen flows into the mouth of the main stream of Nanliu River. The section that enters the sea is called the Limugang River. The main stream is 35 kilometers long, with a basin area of ??148 square kilometers and an average annual flow of 3.74 cubic meters per second. There is a Zhendong sluice in the middle reaches. The river section about 5 kilometers from the sluice to Shougang Bridge has been artificially straightened, with a width of 20-50 meters and a depth of about 0.5 meters. The sugar wastewater from the Xichang Sugar Factory is discharged into the river under the gate, making the river water in this section of the river often polluted and undrinkable during the sugar factory's pressing season. The offshore section of the Shuogang River Estuary is winding, with a width of 100-300 meters between embankments, and a water depth of about 1 meter at low tide. Mangrove shrubs are spread out on the beach.