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Nierji Water Control Project is located on the main stream of Nenjiang River at the junction of Heilongjiang Province and Inner Mongolia Autonomous

Development and utilization of Nenjiang River

Nierji Water Control Project is located on the main stream of Nenjiang River at the junction of Heilongjiang Province and Inner Mongolia Autonomous

Development and utilization of Nenjiang River

Nierji Water Control Project is located on the main stream of Nenjiang River at the junction of Heilongjiang Province and Inner Mongolia Autonomous Region. On the right bank of the dam site is nierji town, Molidawa Daur Autonomous Banner, Inner Mongolia Autonomous Region, and on the left bank is Erkeqian Town, nehe city, Heilongjiang Province, which is about 189 km away from Qiqihar, the downstream industrial center. The total construction period of Nierji Water Control Project is 5 years, and the construction started on June 1 2006. The construction diversion adopts two stages, the first stage is the left bank open channel diversion, and the second stage is the temporary bottom hole diversion in the dam section between the powerhouse installation. 200 1 1 .8 realized the first-stage interception, in September 2004 15 realized the second-stage interception, in September 200511closed the floodgates, and in July 20061. It is a large-scale control project focusing on flood control, urban life and industrial and agricultural water supply, combining with power generation, improving downstream shipping and water environment, and creating conditions for optimal allocation of water resources in Songliao region. The normal water level of Nierji Water Control Project is 216.00m, the check flood level is 219.90m, the design flood level is 218.15m, and the flood control level is 218.15m. The total storage capacity of the reservoir is 86 1 100 million cubic meters, including 2.368 billion cubic meters for flood control and 5.968 billion cubic meters for Li Xing, with a total installed capacity of 250,000 kilowatts and an average power generation of 638.7 million kwh for many years.

Yinhe Reservoir, located in the middle reaches of the Yinhe River, a tributary on the right bank of Nenjiang River in gannan county City, Heilongjiang Province, has a controlled drainage area of 1660 square kilometers and a total storage capacity of 226.5 million cubic meters. It is a large-scale water conservancy project that has been adjusted for many years, focusing on flood control and irrigation, taking into account the comprehensive utilization of fish farming and power generation. This project is designed according to the once-in-a-century flood and checked according to the once-in-a-thousand flood. The dam length of the reservoir is 17 15m, and the maximum dam height is 20m. Once-in-a-century flood, with peak flow of 735 cubic meters per second, is the largest possible flood (according to 1.57 times of once-in-a-century flood). The power station is equipped with four 250kW generator sets.

Taiping Lake Reservoir, located in the upper reaches of Huanghaogou, a tributary of Nenjiang River, was originally named Huanghaogou Reservoir, with a control area of 683 square kilometers and a total storage capacity of153.33 million cubic meters. It is a large (II) reservoir with comprehensive utilization of flood control, irrigation, fish culture and tourism. The reservoir hub project consists of earth dam, spillway and water conveyance tunnel. The scale of the project was originally designed according to 100 flood, and it was checked by 500-year flood. Now it is designed according to 100 return flood, and checked by the return flood in 2000. Engineering second class, second class. It is a control project to promote flood control in Chahayang irrigation area, and it is the guarantee water source for the irrigation area to pass the Sharbat period safely. In the dry season, the irrigation area can replenish water to irrigate paddy fields 10.4 million mu. The reservoir protects the lives and property of 432,000 mu of cultivated land, 229,000 mu of grassland, 3 townships, 77 natural villages and 47,700 people.

Yueliangpao Reservoir is located at the end of Taoer River and the right bank of Nenjiang River in Heilongjiang Basin. The junction of Da 'an and Zhenlai counties. This project started in April of 1974 and was completed in July of 1976. In August of the same year, it began to store water and put it into operation, and the reservoir has been running well so far. The basin area of the reservoir is about10.9 million square kilometers (Taoer River is about 310.3 million square kilometers and Nenjiang River is about10.6 million square kilometers). The total storage capacity is165438+99 million cubic meters. It is a large plain reservoir with comprehensive utilization of fish farming, irrigation and flood regulation. The reservoir hub project consists of earth dam, water storage sluice and irrigation canal head. Earth dam is a homogeneous earth dam, which consists of a main dam and six auxiliary dams. The reservoir project is designed according to the combination of 50-year flood of Taoer River and 20-year flood of Nenjiang River, and checked according to the combination of 50-year flood of Taoer River and Nenjiang River.

Shengli Reservoir, located in Hongxing Town, northwest of Tongyu County, Jilin Province, is located in the south branch of Huolin River, Nenjiang River system in Songhua River basin, which is13km away from the county seat. It is a medium-sized plain reservoir, and the river channel is blocked. Reservoirs are mainly used for flood control and comprehensive utilization of irrigation and aquaculture. Shengli Reservoir is responsible for protecting Pingqi Railway, Changbai Highway and Tongyu County. The construction of Shengli Reservoir started in June 5438 +09581October, and the earthwork and sluice works were completed in February 65438 +0959. The reservoir design flood is once every 50 years, and the check flood is once every 300 years. The engineering grade is Grade III, and the main building grade is Grade III, with a total storage capacity of 32.05 million m3 and a controlled drainage area of 6.5438+0.24 million square kilometers. The design flood level is 15 1.42m, the check flood level is 15 1.7 1m, and the dead water level is148.9m.

Xinglong Reservoir is located in Sijingzi Town, 45 kilometers northwest of Tongyu County. It is a medium-sized reservoir in the plain, located in the middle reaches of Huolin River in Nenjiang River system of Songhua River Basin. The reservoir protects Pingqi Railway, Changbai Highway and Tongyu County, with a protected area of more than 800 square kilometers, a population of nearly 6.5438+200,000 and 700,000 mu of cultivated land. At the same time, it undertakes the irrigation task of 20 thousand mu of paddy field downstream, and its fish culture benefit is also very significant. The total storage capacity of the reservoir is 3 1 10,000 cubic meters, which is designed according to the 50-year flood return period and checked according to the 300-year flood return period. Check flood level165.24m. In order to solve the problems of water use in Daqing Oilfield, agricultural irrigation water use in Songnen Plain and people's domestic water use, develop fish farming, reed farming and improve grassland, since the early 1970s, three water transfer projects, namely "three major water transfer projects", have been invested and constructed successively. The "Three Diversion" from Dukou, Laha Town, nehe city to the hinterland of Songnen Plain, the main stream of Nenjiang River, has a project control area of 37.5 million mu, the length of the main diversion canal is 45 kilometers, and the diversion flow is 100 m3/s. Due to the introduction of Nenjiang River water, the degraded grasslands, reduced reeds and disappeared swamps in the "Three Diversion" control area have recovered their vitality, birds have come here to live, fisheries have been greatly developed, and grain output has been improved.

Bei Nenjiang Water Diversion Project, also known as Nenjiang Water Diversion Project. Located 35 kilometers southwest of Nehe County, it is a provincial key project. It is mainly used for water supply of Daqing Petrochemical Company and domestic water for residents, and also for farmland irrigation. /kloc-0 started in September, 1972, and was completed in August, 1976. The head of the canal is on the left bank of Nenjiang River, 4 kilometers northwest of Laha Town. The channel adopts electric gate, and there is no dam to divert water to Nenjiang River. The aqueduct is 425 meters long. The riverbed is 42 meters wide at the top and 22-28 meters wide at the bottom, with an average water depth of 2.3 meters. The water diversion period is from the end of April to the end of 10 every year. The annual water intake is 690 million cubic meters. Through Laha Town, Tuanjie Township, Fuyu County and Lindian County in the county to Hongqi Reservoir in Anda City.

The South-to-North Water Diversion Project, referred to as the South-to-North Water Diversion Project, starts at the foot of Hongtu Mountain in Xiguandi Village, Talaha Town, Durbert County, and introduces Nenjiang River water into the headwater sluice, which flows through Xiguandi Village, Niujiawopu, Dapaipai, camel neck branch of Hongqi Ranch, Baobao Village and Li Jiayao Village in Yaoxintun Township, and then enters Ertapao at the junction of this county, Daqing City and Zhaoyuan City, and then flows through Dalahai. From Nenjiang water intake to Urtapao, the whole project is divided into four parts: river water intake project, channel water diversion project, canal head hub project and water main canal project.

The middle route project of South-to-North Water Transfer Project, also known as Xinneng Canal and Wushuang River. Located in the closed flow area at the end of Wuyuer River and Shuangyang River in Songnen Plain, it was originally named Wu Shuang Water Diversion Project. Later, because it lived between the northern bidding project and the southern bidding project, it was renamed the central bidding project (hereinafter referred to as "the middle bidding project"). The control scope of the project is North-South 150km, East-West 50km, with a total area of 7500km2. The main canal of Nenjiang Middle Line is located at Huangyutan on the left bank of Nenjiang River in Deng Ke Village, Youyi Township, Fuyu County.

In addition, there are three kinds of water diversion projects in Baicheng City, Jilin Province: Tao Tao Water Diversion Project, Nen Water Diversion Project and Huohe Water Diversion Project.

Taohe River Diversion Project starts from Longhuatu Junction of Taoer River, with a diversion canal length of 105km and 75km to Yanpu Dispatching Station. Along the way, it passes through 2 counties and cities and 8 townships. Water can be supplied to Xianghai Wetland (Nature Reserve), 1 large reservoir (Xianghai), 3 medium-sized reservoirs (Chuangye, Xinglong and Shengli) and 12 reservoir and foam swamp, and 42,800 mu of reeds, 0.5 million mu of grassland and 0.5 million mu of fish culture1. Buildings include Longhua Jintu sluice, Longhua Jintu barrage, Liujiaohe intake sluice and barrage, Yanpu flood diversion channel, shelf platform sluice, Yanpu sluice and No.4 ditch water drop project. The designed diversion flow is 65,438+000 cubic meters per second. Due to the disrepair of diversion channels, some river sections are seriously silted, and only 40 cubic meters of diversion can be conducted per second.

The water diversion project, located on the main stream of Huolin River, 8 kilometers away from the border of Inner Mongolia, will build a 3,686-meter-long tongfa barrage; Build a flood diversion gate on the left bank of the upstream of the barrage; Construction of 14.5 km flood diversion canal from flood diversion gate to Emute River with a traffic bridge; Construction of crossing project at the intersection of Huolin River North Branch and Xingfu Canal, maintenance of Xingfu Sluice, and reconstruction of intake sluice of Xinglong Reservoir. Diversion is to introduce the flood into Xianghai Reservoir, and then connect it with Xinglong and Shengli Reservoirs through Xingfu Canal after storing water in Xianghai Reservoir, making it a flood diversion project with flood control as its main task and flood storage and detention as its benefit. The first phase of the project includes: flood diversion sluice hub, Tongfa barrage, flood diversion canal, traffic bridge, intersection of Gu Bei and Xingfu Canal, maintenance of Xingfu sluice, reconstruction of intake sluice of Xinglong Reservoir, etc. This project is Grade IV, and the main buildings are designed according to Grade IV. The shunt flow is 25 cubic meters per second.

The water intake of the water diversion project from Nenjiang to Baibai is selected in Baishatan of Nenjiang River, and water is supplied to Zhenlai Yangshapao and Xiangyang Shapao through a main water conveyance canal with a length of about 45km. The control area is 2,000km2, and the water consumption is 7130,000 cubic meters, so as to ensure the surrounding water use, especially to supply water to Momoge Wetland through Erlongtao River, so as to ensure the wetland water demand. After the completion of the project, not only will the water storage capacity of Yang Sha reach 654.38+0.5 billion cubic meters, but also the wetland and Momoge Nature Reserve in Erlongtao River Basin of Zhenlai County will be developed, covering an area of about 2000km2. The cultivated land area is controlled at 350,000 mu, including Zhenlai County/kloc-0.8 million mu and Taobei District/kloc-0.7 million mu. The groundwater in Baicheng can also be replenished through the Baicheng Canal.

Satellite Canal, located 30 kilometers southeast of Nehe County. It was excavated by Dedu, Keshan and Nehe counties. The head of the canal is in Laoshan, Dedu County, and the Namur River leads up the mountain from the mud mouth in the county and enters Jiujing Township. The total length is 3 17 km. 1August 28th, 958, ground was broken. 196 1 year, dismounted due to natural disasters. 1966 was updated, 1968 was included in the national plan, and 1974 was officially opened to water for 84 kilometers. By 1978, the permanent works have been completed by 7 1, with 345 tons of steel, 0/900 cubic meters of wood and 0/300 tons of cement. When the flow rate is 9 seconds/m3, the planned benefit is 1.45 million mu, and the actual benefit is 7000 mu. In spring, there is no water in the canal, and in summer and autumn, the canal overflows and the farmland suffers. Jiujing Township dredges silt every year 1 10,000 cubic meters. Chahayang Irrigation District is located in gannan county on the right bank of Nuo Min River, a tributary of Nenjiang River, and is under the jurisdiction of Chahayang Farm of Qiqihar Branch of Reclamation Area. The total irrigation area is 58. 1.2 thousand hectares, the designed irrigation area is 38.9 thousand hectares, and the actual irrigation area in 2005 is 34.7 thousand hectares. The largest irrigation area in Heilongjiang Province, together with Panjin in Liaoning Province, Lishu in Jilin Province and Guo Qian, is called the four major irrigation areas in Northeast China. The water source of the irrigation area is mainly Nuo Min River, supplemented by Taiping Lake Reservoir built upstream of Huanghaogou. Its irrigation projects include: (1) the diversion canal head hub project built in the middle reaches of Nuo Min; (2) Taiping Lake Reservoir in the upper reaches of Huanghaogou; (3) Irrigation and drainage canal system and supporting buildings in the irrigation area are composed of three parts. The diversion hub at the head of the canal includes a 6-hole intake sluice with a total width of 30 meters on the right bank, a 9-hole flood discharge sluice at the head of the canal, a main riverbed rockfill dam, a beach reinforcement project and a Sifang Shandong earth dam.

Yinhe Irrigation District is located in the south of gannan county County, on the right and left banks of the lower reaches of the Yinhe River, on the floodplain and on the first-class terrace. The irrigation area of diversion of river is divided into south irrigation area and northeast irrigation area, and the south irrigation area is located in the south of Gannan county, starting from hills in the west, east to the levee on the right bank of diversion of river, north to the south branch of Gannan town, and south to Bali Ganzi, Qishi and Hala Naval Racecourse. Including some villages in Gannan Town, Hongjian Town and Changshan Town. The second irrigation area in Northeast China is located on the left bank of the lower reaches of the Yinhe River, starting from hills in the north, reaching the left bank levee of Yinhe River in the south, Ganping Highway in the west and Yinhe Township in the east. Including the county seed farm and part of Yinhe Township. There are 20 brigades (fields) 120 teams in the whole irrigation area for diverting rivers, with an agricultural population of 2 1 10,000 people and cultivated land of 200,000 mu. The irrigation area is irrigated by gravity water from the river diversion reservoir, with a total area of 340,000 mu, a project control area of 250,000 mu and an irrigation area of 6.5438+0.96 million mu (including 38,000 mu of paddy field and 6.5438+0.58 million mu of dry land). Belonging to a large irrigation area.

Funan Irrigation District was surveyed and designed in 1973 according to the planning of Nenjiang North Water Transfer Project and on the basis of waterlogging control in Henan Province. The irrigation project started in March, 1974,10.8 cut the ribbon to boil water, 1976. In June, 1977, the project was basically completed. Two control gates in the south section of Nenwunan in the north of Funan Irrigation District were started in March, 9 km and 2 1 km, 1978, and completed in October, 1979/kloc-0. Funan Irrigation District has a design flow of 10 m3/s and an irrigation area of 205,000 mu.

Xingsheng irrigation area is a large-scale pumping irrigation area in the lower reaches of Nenjiang River in central China, which uses backwater from Dongsheng Reservoir for pumping irrigation. The irrigation area is located on the west side of Haman Highway in Prosperous Township, with a total area of 1.27 million mu. The construction of prosperous irrigation area started in the winter of 1968, officially opened in August of 197 1, and was fully completed in 1976. 198 1, the county water conservancy bureau carried out rectification and review design of the irrigation area. The designed irrigation area is 58,800 mu, including 65,438 mu of well irrigation +0.065438 million mu. By the end of 1985, there were pumping stations 1 seat in Wangguan irrigation area, with an installed capacity of 475 kilowatts, a lift of 8.9 meters, a total water intake of 3.24 cubic meters per second, an effective irrigation area of 0.73 million mu and an actual irrigation area of 0.32 million mu.

Long Irrigation District, 1942, part of the irrigation project was built here by Japan Development Group. After the founding of New China, the local people maintained the project, and the paddy field area increased from 65,438 mu to 0,956 mu, reaching 4600 mu. 1967, Qianjin and Bandai Pumping Stations were completed, and Longqiao 'an Irrigation Area was officially listed as an irrigation area of over 10,000 mu. 1982, Long Qiao 'an Irrigation District was listed as a provincial key irrigation and water conservancy project. After reviewing the design, the total area of this area reached 210.20 million mu, and the designed irrigation area was10.63 million mu, of which the self-flow irrigation area was1.10.50 million mu, and the pumping irrigation area was 4850 mu. The design flow is 2. 14 m3/s, 1985, and the main canal of the whole irrigation area is 1 strip, with the length of10.3km; There is a 10 branch canal with a length of 10.5km, a 1 main drainage ditch with a length of 6.8km, and a 1 barrage, intake sluice, pumping station and drainage station at the head of the canal. The accumulated earthwork is 210.4 million cubic meters, with an investment of 703,000 yuan, an effective irrigation area of 9,000 mu and an actual irrigation area of 8,000 mu.

In Taha irrigation area, Sanjiazi starts from the main canal, passes through Qifudi, passes through Taha, Magang and Fengtun, and crosses Beiqi Railway to Erlongtun, with a total length of 34.5 kilometers. 1958 Construction started in winter. In July, 1970, the mid-line water transfer project was completed. 1974, the second Wu Shuang branch was established. 1978, the third, fourth, fifth and sixth branches of Wu Shuang were built one after another, and the Gisburg pumping station was also built. * * * Completed earthwork of 276,000 cubic meters. The same company contributed 234 thousand. Due to the renovation of bare pipe, the irrigation area did not play its due role.

Jiangqiao Irrigation District, located on the right bank of Nenjiang River in Jiangqiao Town, Tailai County, started construction at 1969. Up to 1985, there are 5 main canals in the field canal system, with an earthwork volume of 704,000 cubic meters, 972 branch canals, bucket canals and agricultural canals, with an earthwork volume of 6,543.8+0.34 million cubic meters. There are 80 main buildings on the main canal. The total earthwork volume of main canal buildings is 28,000 cubic meters, including 336,000 cubic meters of stone and 2 13 cubic meters of concrete. The main structure of Dounong Canal is 1.035, with a total earthwork volume of 35,000 cubic meters, stone volume of 80,600 cubic meters and concrete volume of 0.1.35 million cubic meters. Farmland benefits an area of 40,000 mu every year, including 0.5 million mu of irrigated land, 0.5 million mu of dry land and 30,000 mu of sowing with water and filtered water.

Tallaha Irrigation and Drainage Project is located in Xiguan Land, Tallaha Town, Dorbod Mongolian Autonomous County. The irrigation and drainage area belongs to the flooded area of Nenjiang River, with an area of 5 1 10,000 mu. The irrigation and drainage station is located at the head of the South-to-North Water Diversion Project, which is integrated with the intake sluice of the South-to-North Water Diversion Project and belongs to the South-to-North Water Diversion Project. The irrigation area is 64,600 mu, including paddy field10.6 million mu and watershed area of 610.4 million mu. The total supporting quantities are138,000m3. Among them, earthwork129000m3, concrete 3800m3, masonry 4300m3 and gravel cushion1500m3.

Chuo 'er Irrigation District Project is located in Bayanchagan Township, Dorbod Mongolian Autonomous County. The irrigation project was built at the entrance of Nenjiang River in flood season, with Nenjiang River as the main stream in the west, surrounded by hills in the east and north, and connected with the flood control dike of Nenjiang River in the south. The total area is 70 square kilometers, and the planned project control area is 654.38+10,000 mu, including 64,700 mu of cultivated land. The designed irrigation area of the irrigation area is 38,000 mu, including paddy field area of 9,000 mu, designed flow rate of 2.3 m3/s, flow rate of supporting pumps of 2.55 m3/s, and installed capacity of 5 sets of 275 kW.

Xiaohekou Irrigation District Project is located in Yaoxintun Township, Dorbod Mongolian Autonomous County, on the alluvial plain of the floodplain on the left bank of Nenjiang River. Xiaohekou Irrigation District was completed at the end of 1985, with a national investment of 3 million yuan, 800,000 man-days and 700,000 cubic meters of earthwork. There are 2 1 village, and the cultivated land area is 25,000 mu.

Minyi Irrigation District is located in Jianguo Village, Minyi Township, Zhaoyuan County, on the left bank of Nenjiang River. Control the villages of Jianguo, Minyi and Xincun, with a design area of 44,700 mu, including 20,000 mu of paddy field, 24,700 mu of dry land and 40,000 mu of irrigation area. 1983 irrigated 2,500 mu of rice, used 37,000 mu of drought-resistant water, and the average yield per mu in the irrigation area was 320 kg. There are 45 main canals and 85 km long branch canals, as well as 54 buildings of various types. This irrigation area is managed by villages and towns and belongs to a single irrigation type. Existing mechanical and electrical equipment: diesel engine 765,438+04 horsepower, 850-caliber water pump 65,438+0,500-caliber water pump 65,438+0,300-caliber water pump 4, with a lift of 5 meters and a flow of 2.0 cubic meters per second. The water source of irrigation area is stored by the reservoir outside the dike, which is seriously affected by the low water in spring.

Xinzhan Irrigation District, located in Sihe Village, Xinzhan Township, Zhaoyuan County, on the left bank of Nenjiang River, governs Sihe Village, Yong 'an Village and Liaoyuan Village, with a design area of 40,000 mu, including 6,000 mu of paddy fields and 34,000 mu of dry fields, and an actual irrigation area of 8,400 mu. There are 25 trunk and branch passages with a length of 5 1km and 2 buildings 12. By the township management, irrigation single type. Motor equipment: 200 kW motor, 850 caliber 1 pump, 2 40 HP diesel engines, with a lift of 7 meters and a flow rate of 2. 1 m3/sec.

Gulong Irrigation Area is located in Gulong Lidoushan Dike in Zhaoyuan County, on the left bank of Nenjiang River, which controls Yongsheng, Desheng and Lidoushan. The designed irrigation area is 45,000 mu, including paddy field 6,543,800+0.2 million mu, dry land 33,000 mu, actual irrigation area 25,000 mu and irrigated paddy field 450 mu. The sowing area of drought-resistant zone water is 6.5438+0.5 million mu, and the average yield per mu in irrigation area is 290 kg. Trunk-branch passage 19, 60km long, building 4 1. This irrigation area is managed by villages and towns and has dual functions of reservoir and power station. Electromechanical equipment: 130 kW motor, 1 5.0-caliber water pump, 4.5m head, 1.5m3/s flow.

Fuqiang Irrigation Area is located outside the steep embankment of Fuqiang Township, Zhaoyuan County, on the left bank of Nenjiang River, and controls the land under the steep slope of Fuqiang Township, with a design area of 22,000 mu, including 5,000 mu of paddy field, dry land 1.7 million mu, irrigation area of 2,000 mu, and drought-resistant water sowing 1.6 million mu. The average yield per mu in this irrigation area is 500 Jin. Trunk-branch passage 18, with a length of 39 kilometers. Managed by villages and towns, there is no fixed pump house in this irrigation area. During irrigation, the machine moves according to the water level. Electromechanical equipment: 254 HP diesel engine, 2 350-caliber pumps, 300-caliber pumps 1 set, lift of 6-8m, flow1.27m3/sec.

Toutai Irrigation District, located in Yonghe Village, Toutai Township, Zhaoyuan County, on the right bank of Bajia River, controls the hillsides of Yonghe, Tuanjie, Liu Yang, Yangyingzi, Dongda, Qianjin and Beixing Village, with a designed irrigation area of 20,000 mu, all of which are irrigated in dry land, and the actual irrigation area has reached 2,000 mu. There are two trunk lines, 23 kilometers long, 17 buildings. There are eight rivers pumping water in this irrigation area. Electromechanical equipment: 392 motors, 350-caliber pumps 1 set, 3 300-caliber pumps, 8-inch pumps 1 set, with a lift of 5m and a flow of 3m3/sec.

Tuanjie Irrigation District is located on both sides of Nenjiang main canal in the south of Tuanjie Township, Nehe County. Low-lying and fertile soil. Built in 1980. There are two diversion doors. A diversion point at 1 1 km, with a main canal length of 3.6 km and a diversion flow of 0.33 second cubic meter. The other is 22km away from Yinnen, and the main canal is 2.5km long, which controls 3 sub-canals, 1 branch main canal. Water diversion key 1.29 second cubic meter. There are also 34 ditches with a length of 40 kilometers, benefiting an area of 24,000 mu.