Daqing River in China

The Daqing River (大清河), a tributary of the Hai River Basin, is also known as Shangxi River (上西河). The river gets its name due to its clear water, in contrast to the neighboring Yongding River (永定河) and Hutuo River (滹沱河), which are both sandy rivers. The Daqing River flows through the central region, and its clarity sets it apart from the surrounding rivers.

River System Overview

The Daqing River system consists of two main branches: the Southern Branch and the Northern Branch.

Southern Branch

The Southern Branch is fed by tributaries flowing into Xidian (Baishuiyang) (白洋淀), with floodwaters being stored in Xidian and eventually flowing into the Daqing River via Zhaowang River, Zaolinzhuang New Path, and Zhaowang New River.

Northern Branch

The Northern Branch mainly consists of Juma River (拒马河). It splits at Zhangfang into the South Juma River and North Juma River. The North Juma River receives contributions from Xiaoqing River (小清河) and Liuli River (琉璃河, also known as Dashihe River). Below Dongci Village, the North Juma River is known as the Baigou River (白沟河), while the South Juma River flows eastward and joins the Baigou River in Baigou Town, where it is referred to as Daqing River.

The Southern Branch originates from Cuiping Mountain (翠屏山) in the southern part of Hunyuan County (浑源县), Shanxi Province (山西省), while the Northern Branch has its source at Lai Mountain (涞山) in Laiyuan County (涞源县), Hebei Province (河北省).

Length and Main Tributaries

• Southern Branch: The Southern Branch stretches 336 kilometers from its source to the Zaolinzhuang Hub (枣林庄枢纽).

• Northern Branch: The Northern Branch stretches 303 kilometers from the source to the Xinggai Fang Hub (新盖房枢纽).

While the Southern Branch is slightly longer, the Daqing River is considered to originate from the confluence of the South Juma River and the North Baigou River, which is regarded as the main stream today.

Daqing River Flow and Tributaries

The river flows through Dongdian's Sixth Fort (东淀第六堡), where it converges with Ziya River (子牙河) to form Xihe (西河). Some floodwaters flow through Xihe, entering the Hai River (海河) via the Xihe Gate Hub (西河闸枢纽) into the Bohai Sea (渤海). Most of the floodwaters, however, enter through the Floodwater Gate (进洪闸) into Duliu Jianhe River (独流减河), passing through Gongnongbing Gate (工农兵闸) before entering the Bohai Sea.

• River length: 483 kilometers from the source to the Gongnongbing Gate (工农兵闸).

• Drainage Area: 43,060 square kilometers (recorded as 32,700 square kilometers in the Hebei Provincial Gazetteer (《河北省志·地理志》)).

Historical Significance

Historically, the Daqing River has been prone to frequent floods, especially in the middle and lower reaches. However, due to years of regulation and management after the founding of the People's Republic of China and reduced water flow due to climate changes, the river has become a crucial source of irrigation for the agricultural areas around Baoding (保定) and Dongdian. It also serves as an important water source for Baixian Wetland (白洋淀). Before the 1960s, the Daqing River was a major navigation route connecting Baoding to Tianjin, with significant economic value in shipping.

River Statistics

• Alternative Name: Shangxi River (上西河)

• River System: Hai River System (海河流域)

• Geographical Location: Central Hai River Basin

• Provinces Traversed: Shanxi (山西), Hebei (河北), Tianjin (天津)

• Source: Lai Mountain (涞山), Laiyuan County (涞源县), Hebei Province (河北省)

• Main Tributaries: Juma River (拒马河), Baigou River (白沟河), Tang River (唐河), Zhulong River (潴龙河)

• River Length: 483 km

• Drainage Area: 43,060 km²

• Mouth: Xinkou Town (辛口镇), Tianjin (天津市)

Origin of the Name

The Daqing River (大清河) is named for its clear water, unlike the neighboring rivers Yongding River (永定河) and Hutuo River (滹沱河), which are sandy rivers. The Daqing River lies between these two rivers in the Hai River Basin, hence its name. The river's clarity has made it stand out, and it is often referred to as Shangxi River (上西河) in historical records, especially due to its connection to the Xihe River (西河) in Tianjin.

Main Stream Overview

River Course and Direction

The Daqing River flows between the Yongding River (永定河) to the south and the Ziya River (子牙河) to the north, situated in the central part of the Hai River Basin. The river spans across four provinces and municipalities: Shanxi (山西), Hebei (河北), Beijing (北京), and Tianjin (天津).

The Daqing River system consists of two main branches: the Southern Branch and the Northern Branch.

Southern Branch

The Southern Branch has tributaries flowing into Xidian (Baishuiyang) (白洋淀), where floodwaters are stored before flowing into the Daqing River via Zhaowang River, Zaolinzhuang New Path, and Zhaowang New River. The Southern Branch flows from its source at Cuiping Mountain (翠屏山) in the southern part of Hunyuan County (浑源县), Shanxi Province (山西省), and stretches for 336 kilometers to the Zaolinzhuang Hub (枣林庄枢纽).

Northern Branch

The Northern Branch primarily consists of Juma River (拒马河). The Northern Branch splits into South Juma River and North Juma River at Zhangfang. The North Juma River eventually flows into the Baigou River (白沟河) after passing through Xiaoqing River (小清河) and Liuli River (琉璃河). The Southern Branch and the Northern Branch meet to form the Daqing River.

The Northern Branch originates at Lai Mountain (涞山) in Laiyuan County (涞源县), Hebei Province (河北省), and flows for 303 kilometers to the Xinggai Fang Hub (新盖房枢纽).

Tributary Confluence

The confluence of the South Juma River and North Baigou River forms the Daqing River, with its flow moving downstream through Baigou Town and the Ziya River (子牙河), where it eventually joins the Hai River (海河) system and flows into the Bohai Sea (渤海).

River Statistics

• Southern Branch Length: 336 kilometers

• Northern Branch Length: 303 kilometers

• Northern Branch Watershed Area: 10,151 square kilometers, with an average annual runoff of 1.169 billion cubic meters

• Southern Branch Watershed Area: 21,054 square kilometers, with an average annual runoff of 1.888 billion cubic meters

The total length of the river from its source to the Gongnongbing Gate (工农兵闸) is 483 kilometers, with a drainage area of approximately 43,060 square kilometers (recorded as 32,700 square kilometers in the Hebei Provincial Gazetteer (河北省志·地理志)).

Flood Control and Irrigation

Historically, the Daqing River has faced frequent flooding in its middle and lower reaches. However, after extensive regulation and management since the founding of the People’s Republic of China, and due to the reduction in flow caused by climate change, the river has become an essential irrigation source for the Baoding (保定) and Dongdian agricultural regions. It also plays a crucial role in replenishing the Baixian Wetland (白洋淀).

Before the 1960s, the Daqing River was a major waterway for transportation between Baoding and Tianjin, making it a vital route for commerce.

Major Tributaries

The Daqing River system naturally divides into two branches—north and south—due to the terrain. The key tributaries of each branch are as follows:

Northern Tributaries

Beiquma River (北拒马河)
The Beiquma River originates in the Laiyuan Basin and splits into the northern and southern branches at the Tie Suoya in the southwest of Zhangfang. The southern branch joins with the Bei Yishui (北易水) and Zhong Yishui (中易水) rivers before flowing into the Beiquma River. The northern branch has multiple tributaries, including the Huliang River (胡良河), Liuli River (琉璃河), and Xiaoqing River (小清河), which join to form the Baigou River (白沟河) upstream. These rivers merge at the Baigou Bridge (白沟大桥) and flow south to the Xinge Fang flood diversion and the Baiyangdian Lake (白洋淀). This river system is one of the five major water systems in Beijing and a tributary of the Daqing River.

Liuli River (琉璃河)
A tributary of the Beiquma River, this river originates in the western mountains of the Fangshan District and flows through areas like Xiyuanling and Tangzhuang before entering the plains. It eventually merges with the Beiquma River at the Ma Tao Town of Hebei Province. The total river length is 108 kilometers, with a drainage area of 1243.4 square kilometers, including both mountainous and plain regions.

Huliang River (胡良河)
A tributary of the Beiquma River originating in the Fangshan District's Shuitou Village. The river flows 15 kilometers within the city, with a basin area of 100 square kilometers.

Bei Yishui (北易水)
Originating from the southern slope of the Yunmeng Mountain (云蒙山), this river flows southeast to the Longquan Village and eventually merges with Zhong Yishui in Dingxing County.

Zhong Yishui (中易水)
This river also known as the Wushui (武水), originates from the western foothills of the Fulu Ridge (蚍蜉岭) in Yixian County. It flows eastward, merging with the Bei Yishui to form part of the Beiquma River system.

Southern Tributaries

Zhulong River (潴龙河)
This major river originates from the southern part of the Baiyangdian Lake area and is historically referred to as the Chao River (蟾河) or Yangcun River (杨村河). It flows northeast through several counties, including Anxin, Bo Ye, and Lixian, before reaching Baiyangdian Lake. This river is the largest tributary on the southern side of the Daqing River system.

Fuh River (府河)
Also known as the Qingyuan River (清苑河), this river is a major waterway running through the western part of Baiyangdian. It used to be a crucial water transport route for Baoding city during ancient times.

Tang River (唐河)
This river, the largest tributary in the southern branch of the Daqing system, originates from the southern Cuiping Mountain (翠屏山) in Shanxi Province. The Tang River flows through multiple counties before entering the sea.

Xiaoyi River (孝义河)
This river is located southwest of Baiyangdian and connects several villages before eventually flowing into Baiyangdian.

Caohu River (漕河)
This river, also known as Xushui (徐水), runs through the western part of Baiyangdian and is fed by the Caoheze (曹河泽) in the Xushui area.

Puhe River (瀑河)
Divided into northern and southern branches, the Puhe River is also referred to as Hailu River (雹河) and Baohe River (鲍河). It flows through several towns before reaching Baiyangdian.

Pinghe River (萍河)
Located in the western part of Baiyangdian, Pinghe River, formerly known as Ping Shui (平水) or Pingquan River (萍泉河), flows from the south of Dingxing and meets with other rivers before entering Baiyangdian.

Tributaries of the Baiyangdian Area

Xiaobai River (小白河)
Originally an ancient river known as the Bailong River (白龙河), Xiaobai River has undergone multiple changes over time. The current river was carved out in 1951 and now flows through multiple counties, including Lixian and Sunning, eventually merging with Baiyangdian.

Guyang River (古洋河)
An ancient river, now serving as a main drainage channel for the Daqing River system. It originally formed part of the Ziya River system (子牙河系) and was later modified into a major drainage river for the region.

Flood Diversion Channels

Tang River New Channel (唐河新道)
Located south of Baoding, this flood diversion channel was completed in May 1966. It connects to Baiyangdian Lake.

Xinge Fang Flood Diversion Channel (新盖房分洪道)
This 25-kilometer channel runs parallel to the Daqing River and helps to control the water flow into Baiyangdian.

Duliu River (独流减河)
Named after the town of Duliu, this river helps drain water from the Daqing system into Baiyangdian.

Baigou River (白沟引河)
Located northeast of Baiyangdian, this channel was artificially constructed in 1970 to divert water from the Daqing system into Baiyangdian.

Zhaowang River (赵王河)
This man-made river was created during the reign of Emperor Tongzhi to ease the flow of water from Baiyangdian. It is an important waterway for the Baiyangdian area.

Flood Storage Areas (蓄滞洪区)

Baiyangdian (白洋淀)
Baiyangdian is a natural shallow depression in the Jizhong Depression formed since the Cenozoic era due to differential subsidence. By the Western Han Dynasty, the modern geographical outline of Baiyangdian was roughly formed. In the Song History (《宋史》), it was referred to as "Baiyangdian" (白羊淀), and during the Kangxi era of the Qing Dynasty, the name was changed to "Baiyangdian" (白洋淀). Historically, during flood seasons, the northern tributaries of the Daqing River poured floodwater into Baiyangdian. The narrow, shallow outlet led to frequent flooding. In the Song Dynasty, during the reign of Tang Jie (唐介), the "Tang Dyke" (唐堤) was constructed to defend against floods, followed by the building of the "Thousand Li Dyke" (千里堤). Despite some efforts during the Ming and Qing Dynasties, the effectiveness of flood control was limited. In fact, large-scale dam construction during the late Ming and early Qing Dynasties caused the lake area to shrink. Between 1644 (the first year of the Shunzhi reign) and 1881 (the seventh year of the Guangxu reign), the water area of Baiyangdian shrank by 90%.

After the establishment of the People's Republic of China, the central government attached great importance to the management of Baiyangdian. Measures were taken to reinforce the Thousand Li Dyke, build the Zhaolinzhuang New Channel (枣林庄新道), excavate the Zhaowang New Canal (赵王新渠), and strengthen the Zhaowang New River (赵王新河). These efforts improved the flood discharge capacity of Baiyangdian from 130 cubic meters per second in the early 1950s to 2700 cubic meters per second. This not only effectively controlled flooding but also created favorable conditions for the integrated use of the water and land resources of Baiyangdian.

Baiyangdian is surrounded by levees. The east side has the Thousand Li Dyke, the north side has the Xinan North Dyke (新安北堤), the west side has Zhuangshui Dam (障水埝), Ma Village Small Dam (马村小埝), and Simen Dyke (四门堤), and the south side has the South Dyke (淀南新堤) and Longhua Small Dam (龙化小埝). The total length of levees is 230 kilometers. The total area of the lake is 366 square kilometers, spanning five counties: Anxin, Gaoyang, Renqiu, Xiongxian, and Rongcheng. The lake accepts the floodwaters from Zhulong River (潴龙河), Xiaoyi River (孝义河), Tang River (唐河), Fuh River (府河), Caohu River (漕河), Puhe River (瀑河), Pinghe River (萍河), and Baigou River (白沟引河). The designed total inflow into the lake is 6595 cubic meters per second. After regulating the water in the lake, it flows out from Zhaolinzhuang through the Zhaolinzhuang New Channel and into the East Lake (东淀). The bottom elevation of the lake is generally between 4.1 and 5.1 meters. At a designed floodwater level of 9.1 meters, the storage capacity is 1.038 billion cubic meters. The highest recorded floodwater level on August 4, 1963, was 10.18 meters, corresponding to a storage capacity of 4.173 billion cubic meters.

Dongdian (东淀)
Historically known as Yungmasou (雍妈薮) and later called Triangle Lake (三角淀) during the Qing Dynasty, Dongdian spans across Ba County (霸县), Wen'an County (文安县), and the western suburbs of Tianjin. The designed floodwater level is 6.56 meters at the Sixth Fort (第六堡), corresponding to a storage capacity of 952 million cubic meters, with a submerged area of 345 square kilometers. The bottom elevation is generally between 3.1 and 3.6 meters, with the easternmost area being as low as 2.2 meters. The area is bounded by the Ziya River (子牙河) on the east, the Thousand Li Dyke on the south, the overflow depression and the Xinge Fang flood diversion channel on the west, and the Zhongting Dyke (中亭堤) on the north. The total length of levees surrounding the area is 129 kilometers. The southern side has the Daqing River, which discharges water at 600–800 cubic meters per second, while the northern side has the Zhongting River, which focuses on drainage with a discharge capacity of about 200 cubic meters per second. The highest recorded floodwater level on August 31, 1963, was 7.06 meters, corresponding to a storage capacity of 1.15 billion cubic meters.

Wenanwa (文安洼)
Located to the east of Baiyangdian, south of Daqing River and Dongdian, and west of Ziya River, Wenanwa spans parts of Wenan County (文安县) and Dacheng County (大城县). The area includes 98 villages, a population of 71,100, and 240,000 acres of farmland. The low-lying area is 230 square kilometers with elevations generally between 2.3 and 2.6 meters. The terrain is dish-shaped. Prior to 1949, the area had no drainage outlets, and water would accumulate through natural evaporation, causing year-round waterlogging. Locals have a saying, "Once flooded in Wenanwa, you won't return for ten years." Historically, it would absorb floodwaters from Daqing River and Ziya River during flood season. Between the 20th century and 1960, Daqing River and Ziya River breached their banks 15 times, causing waterlogging in Wenanwa for 37 years. In 1954, 1956, and 1963, floodwaters were diverted into Wenanwa. The highest recorded floodwater level on August 31, 1963, was 7.19 meters, with a corresponding storage capacity of 4.557 billion cubic meters.

Langouwa (兰沟洼)
Located west of Baigou River (白沟河), south of Beiquma River (北拒马河), and north of Nanquma River (南拒马河), Langouwa covers an area of 840 square kilometers and includes 95,000 acres of farmland. The terrain is higher in the northwest and lower in the southeast, with upstream elevations between 30 and 34 meters and downstream elevations around 13 meters. The area not only accepts local runoff but also the floodwater from Baigou River and Nanquma River. At the designed floodwater level of 17.0 meters, the corresponding storage capacity is 220 million cubic meters, with a submerged area of 110 square kilometers. There are 131 villages in the area, with a population of 84,000 and 141,000 acres of farmland.

Jiakouwa (贾口洼)
This area, also known as Qiankinbo, Xiucaibo, and Laoniubo, is located to the east of Ziya River, south of the South Canal (南运河), and southeast of Dongdian. The terrain is low-lying, and it is historically a natural water retention area for floodwaters from the Heilonggang (黑龙港) region. The design floodwater level is 8.0 meters, with a corresponding storage capacity of 373 million cubic meters and a submerged area of 110.3 square kilometers. There are 111 villages in the area, with a population of 139,800 and 165,500 acres of farmland.

Tuanbo Wa (团泊洼)
Located in the area of Jinghai County (静海县) and Dagang District (大港区) in Tianjin, Tuanbo Wa is surrounded by three rivers: the South Canal (南运河), Machangjian River (马厂减河), and Duliu River (独流减河). Historically, it was a low-lying saline-alkali land that accumulated water year-round. The area is crucial for the discharge of floodwaters from the Haihe River system and western floods. The operational principle is that when a major flood occurs in the Daqing River, water from the Haihe River system and Duliu River fully drains, and water from East Lake, Wenanwa, and Jiakouwa is used. Once the water levels in these three areas reach 8.0 meters, the South Canal dykes are breached to allow floodwater into Tuanbo Wa, ultimately leading to the sea.

lood Control and Storage Projects (拦蓄工程)

The Daqing River system is equipped with several large reservoirs to control the flow of water and manage flood risks. These reservoirs include the Hengshanling Reservoir (横山岭水库), Koutou Reservoir (口头水库), Wangkuai Reservoir (王快水库), Xidayang Reservoir (西大洋水库), Longmen Reservoir (龙门水库), and Anggezhuang Reservoir (安各庄水库). Together, these reservoirs have a total storage capacity of 3.235 billion cubic meters, controlling a drainage area of 9,718.5 square kilometers, which accounts for 52.1% of the mountainous region.

Xidayang Reservoir (西大洋水库)

Located 1 kilometer north of Tanghe Outfall, Xidayang Reservoir is situated in Tang County (唐县) in the Baoding area of Hebei Province. It is a large reservoir in the middle reaches of the Daqing River's southern tributary, the Tang River (唐河). The catchment area controlled by the reservoir is 4,420 square kilometers, all of which are mountainous. The reservoir was first built in 1958 and expanded in 1970. Key structures include the main and auxiliary dams, water conveyance channels, normal spillways, and flood discharge tunnels. The total storage capacity of the reservoir is 1.07 billion cubic meters, with a maximum dam height of 54 meters. The main purposes of the reservoir are flood control, irrigation, and hydroelectric power generation, making it an integrated water resource management project.

Wangkuai Reservoir (王快水库)

Located in the upper reaches of the Sha River (沙河) in the Daqing River system, Wangkuai Reservoir is a major water conservancy project situated 1 kilometer west of Zhengjia Village (郑家村) in Quyang County (曲阳县), Baoding City. It is 23.6 kilometers from the county seat of Quyang. Originally named Zhengjiazhang Reservoir (郑家庄水库), it was officially renamed Wangkuai Reservoir on October 20, 1958. The reservoir controls a catchment area of 3,770 square kilometers, which accounts for 59% of the Sha River's total catchment area. Key structures of the reservoir include the main dam, spillway, flood discharge tunnel, and hydropower station. The total storage capacity is 1.389 billion cubic meters, with a maximum dam height of 62 meters. The primary purpose of the reservoir is flood control, with additional uses for irrigation and power generation.

Hengshanling Reservoir (横山岭水库)

Hengshanling Reservoir is located near Fenggou Village (冯沟村) in Chatao Township (岔头乡), Lingshou County (灵寿县), Hebei Province, on the upper reaches of the Cihe River (磁河), a tributary of the Daqing River. It controls a catchment area of 440 square kilometers. The reservoir, built in 1958, serves as a comprehensive water conservancy project for flood control, irrigation, power generation, and aquaculture. The reservoir was expanded from 1970 to 1972, with further reinforcement carried out between 1991 and 1992. Hengshanling Reservoir has played a crucial role in flood control, irrigation, and power generation, particularly in reducing peak flow rates during major floods, including those in 1963, 1967, 1968, 1975, and 1996. The designed irrigation area is 360,000 acres, with an annual irrigation supply of 74.48 million cubic meters and an annual power generation capacity of 1.66 million kilowatt-hours.

Koutou Reservoir (口头水库)

Located on the Gaoh River (郜河), a tributary of the Sha River, Koutou Reservoir controls a catchment area of 142.5 square kilometers. It is a multi-purpose reservoir, primarily used for flood control and irrigation, with additional uses for power generation and aquaculture. The main structures of the reservoir include the river dam, flood discharge tunnel, normal and emergency spillways, and the hydropower station. The reservoir was originally constructed in May 1958, with the main structure completed by October 1964. Between 1970 and 1973, the reservoir was expanded with the addition of a hydropower station and a normal spillway. The total storage capacity is 105.6 million cubic meters, with a flood control capacity of 60.8 million cubic meters and a usable capacity of 16.1 million cubic meters.

Longmen Reservoir (龙门水库)

Located on the Cao River (漕河) in Mancheng County (满城县), Baoding City, Hebei Province, Longmen Reservoir is a major flood control reservoir in the Daqing River system. The reservoir serves a comprehensive role in flood control, irrigation, and water storage, with additional uses for power generation. The project began in February 1958, with construction of a medium-sized reservoir completed by November 1959. It was expanded to a large reservoir by June 1960. The total storage capacity is 118 million cubic meters, and the maximum dam height is 38 meters. Longmen Reservoir was reinforced between November 1974 and June 1977, with additional safety upgrades implemented in 2002.

Anggezhuang Reservoir (安各庄水库)

Located in the upper reaches of the Zhongyishui (中易水) River in Yi County (易县), Hebei Province, Anggezhuang Reservoir controls a catchment area of 476 square kilometers. It is a large water conservancy project primarily used for flood control and irrigation. Construction began in June 1958, and the main structure was completed in June 1960, although it did not undergo formal acceptance testing and continued to be under construction until 2001. The total storage capacity is 303.39 million cubic meters, with a flood control capacity of 201.35 million cubic meters, a usable capacity of 145.53 million cubic meters, and a dead storage capacity of 3.86 million cubic meters.

Key Hydraulic Engineering Projects (枢纽工程)

Zhaolinzhuang Hub (枣林庄枢纽)

Located in the southern part of Zhaolinzhuang Village (枣林庄村) in Renqiu City (任丘市), Hebei Province, the Zhaolinzhuang Hub is a critical control project for flood discharge from Baiyangdian Lake (白洋淀). The hub consists of four sluices, a ship lock, a 25-gate sluice, and the Zhaobei Overflow Weir (赵北口溢流堰), which is situated at the site of the ancient Shiliulian Bridge (十二连桥) on the Zhaowang River (赵王河). This hub was completed in 1965 and 1970. The operational principle is as follows: During the flood season, when the water level at Shifangyuan (十方院) in Baiyangdian reaches 6.6 meters, the sluices are opened to discharge floodwaters. If the water level exceeds 7.6 meters, the overflow weir is activated. When the water level reaches the design flood protection level of 9.1 meters (a 10-year return period), the hub is designed to discharge 2,700 cubic meters per second, increasing to 4,140 cubic meters per second when the water level reaches 9.95 meters (a 50-year return period). If a super-standard flood occurs in the northern tributaries, the Zhaolinzhuang sluice will be operated to control the peak discharge.

Xingaifang Hub (新盖房枢纽)

Located 2 kilometers downstream from the confluence of the Nanjuma River (南拒马河) and the Baigou River (白沟河), the Xingaifang Hub in Xiong County (雄县), Hebei Province, is composed of a flood discharge sluice, a weir, the Bai Gou River inflow sluice, and the irrigation water intake from the Daqing River. The construction of this hub began in June 1970. The operational principle is as follows: When the water level at Xingaifang sluice exceeds 12.5 meters, the sluices are opened to discharge water through the flood channel at a flow rate of 5,000 cubic meters per second. When the water level drops below 12.5 meters, the sluices are closed, and the floodwater flows through the Bai Gou River. If the water level at Shifangyuan exceeds 9.1 meters, the Bai Gou River sluice is closed, and all floodwater is discharged through the Xingaifang flood channel. The Daqing River irrigation sluice is generally not used for flood discharge, but instead serves irrigation purposes.

Wangcun Sluice (王村闸)

Located north of Hangezhuang Village (韩各庄村) in Wen'an County (文安县), Hebei Province, Wangcun Sluice was initially constructed to control the water discharge from Baiyangdian Lake and reduce flooding in the lower reaches of the Daqing River. From 1955 to 1970, it was used to fully discharge floodwaters during the flood season. After 1971, the sluice gates were generally closed. When the water level at the Eastern Baiyangdian reaches 6.56 meters and the water level at Shifangyuan reaches 9.1 meters, the sluice gates are opened to release water into Wen'an Marsh (文安洼) under the direction of the Hebei Flood Control Command Center.

Duliujianhe Flood Discharge Hub (独流减河进洪闸枢纽)

Located south of Liu Bu Village (第六堡村) in Xiqing District (西青区), Tianjin, where the Daqing River and Ziya River (子牙河) meet, this hub is critical for discharging floodwater into the sea. It includes old and new sluices, along with a road bridge. The original sluice, built in 1952, was designed to discharge up to 1,020 cubic meters per second, but this was reduced to 840 cubic meters per second when the new sluice was built in 1968. The new sluice, built beside the old one, discharges up to 2,360 cubic meters per second. The main task of this hub is to maximize flood discharge and control water levels to protect the East Baiyangdian region.

Xihe Sluice Hub (西河闸枢纽)

Located 15 kilometers downstream from the confluence of the Daqing River and Ziya River in Yangliuqing Town (杨柳青镇), Tianjin, the Xihe Sluice Hub includes a river dam, a regulation sluice, and a ship lock. Its primary function is to regulate and store floodwater from the Daqing River, Ziya River, and Nanyunhe River (南运河). During flood events, the hub manages water levels and controls discharge to ensure the safety of the Hai River main stream. It also supports irrigation and water supply for Tianjin City.

Gongnongbing Tidal Barrier (工农兵挡潮闸)

Located at the mouth of the Duliujian River (独流减河) in Tangjiahe (塘家河), Dagang District (大港区), Tianjin, this tidal barrier serves flood control and water storage purposes. Its construction was completed in November 1967. The project is critical for protecting the Dagang Oilfield and the Tanggu Salt Plant, reducing flood risks to Tianjin and the Tianjin-Pukou Railway (津浦铁路). The barrier also facilitates irrigation and water storage, supporting agricultural activities, including rice cultivation, fish farming, and reed production. Once the upstream river works are completed, it will allow the Daqing River system to handle floodwaters more effectively and increase Tianjin's flood protection standards.