General situation of Suijiang water conservancy
Wanjiu Reservoir. Located in Shidong Town, a tributary of Gu Yong River, construction started in early 1987. The retaining dam is a homogeneous earth dam with a height of 14m and a crest length of 80m. The discharge structure is a spillway with a broad top weir, with a bottom width of 3 meters and a maximum flow of 7.5 cubic meters per second; The diameter of the drainage structure is 0.3m, and the maximum displacement is 0.09m3/sec. The earthwork is 60,300 m3, the stonework is 0.4 1.000 m3, and the total project cost is 65,438+994,200 yuan. The rainwater harvesting area of the reservoir is 1.5 square kilometers, the storage capacity is 10.5 million cubic meters, the effective storage capacity is 80,000 cubic meters, the regulated storage capacity is 25,000 cubic meters, and the irrigation area is 300 mu. /kloc-0 was completed and put into use in February, 1988, and it is a small (II) reservoir.
Nakamura Reservoir, located in Nakamura Management Area of Binheng Town, was originally Helinkeng Mountain Pond. Helinkeng originally flowed through Sanbu Cave, and then merged with Yongtai Water in the east of the village to flow into Binheng River and then into Suijiang River. 1952 built a dam at the narrow part of Hefengtang (the current reservoir dam site), 1956 converted it into Helinkeng Shantang, 1962- 1963 increased the foundation thickness of Shantang dam to increase the storage capacity. 198 1 Again, according to the safety factor of the reservoir, the dam of the reservoir was thickened and heightened according to the specifications, and the spillway was widened to expand the reservoir into a small (II) type reservoir. The rainwater harvesting area in the reservoir area is 3.5 square kilometers, with a total storage capacity of 400,000 cubic meters and an effective storage capacity of 360,000 cubic meters. The dam is of homogeneous soil structure, with a dam length of 62m and a dam height of12m (maximum dam height17m).
Huashan Reservoir is a county-run reservoir, which is located on the edge of the pit in Beishi Town. Its engineering benefits are mainly power generation, flood control and fish farming. 1 990 65438+1October1,1June 1994, which was put into operation, is a medium-sized reservoir. The catchment area of the reservoir is 224.50 square kilometers, the normal water level is 247 meters, the total storage capacity is 63 million cubic meters, the effective storage capacity is 46.2 million cubic meters, and the backwater of the reservoir is 14 kilometers. The dam site is located at the edge of the big pit in the upper reaches of the Suijiang tributary valley river. The dam is a reinforced concrete rockfill dam with a dam length of 170.685m, a dam height of 80.80 m, a dam crest elevation of 25 1.20m, a dam crest width of 6 m, and a water front and back slope of 1: 14. The maximum width of dam toe is
Shikanchong Reservoir is located in pai sha zhen, the upper reaches of Luo Fu River, a tributary of Suijiang River, between Luoda Village and Maogang Village. It is a town-run reservoir, designed by the Design Institute of Guang Ningxian Hydropower Bureau, and undertaken by Rhoda Management Area of Baisha Town. Construction started in June 1992 1 1, and was completed and put into operation the following year. Total investment 1.639 million yuan. The catchment area of the reservoir is 20 square kilometers, with a total storage capacity of 654.38+0.33 million cubic meters. It is a small (I) reservoir. The reservoir dam is a mortar gravity dam, with a crest elevation of 160.40m, a maximum dam height of 24.50m, a crest length of 64m and a crest width of 4m. The flood control standard is once every 30 years. Protect more than 6,000 people, defend more than 7,000 mu of cultivated land and 3,600 mu of irrigated area, benefiting village committees such as Rhoda, Luo Xiao, Sangtian, Paisha, Sanjiao and Luo Fu. Water is diverted to Shikanchong Power Station for power generation, with a total installed capacity of 500 kW, annual power generation capacity of/kloc-0.5 million kWh, and annual power generation income of about 500,000 yuan.
The first [small (II)] reservoir in Sihui was built in Sha Fei Goose Reservoir. The reservoir was built in 1954, with a catchment area of 0.67 square kilometers and a total storage capacity of 480,000 cubic meters. The earth dam is 6.5 meters high and 3 meters wide, with an elevation of 12.9 meters and an irrigated area of 100 hectares. Baishuihe cascade hydropower station. Baishui River is located in Qiashui Town, which is the upper reaches of Fenggang River. There is more water and a big drop. The exploitable amount of hydraulic resources exceeds 654.38 million kilowatts. In the early 1980s, the county took the construction of Baishui River cascade hydropower project as a project, and planned to develop Baishui River hydropower resources, which was examined and approved by Guangdong Provincial Planning Commission 1993. At first, the power station construction project was jointly organized by the provincial electric power bureau and the municipal and county governments, but it didn't take long. 1997 was jointly organized by the county government, Hongkong and China Light and Power Company Limited and Sun Hung Kai China Development Fund Co., Ltd., with each party holding 50% shares. A concrete face rockfill dam was built in Gaotangxia in the upper reaches of Baishui River to stop the river from storing water. Three cascade hydropower stations, namely Gaotang, Yu Tao and Wan Xin, will be built in the downstream of the dam, and a long-distance hydropower station will be built in the upstream of the dam to introduce the river water into Gaotang Reservoir. The four-stage power station has a total installed capacity of 74,900 kilowatts and a total investment of about 654.38+0 billion yuan.
Gaotang Hydropower Station, located in Gaotang Village, more than 20 kilometers away from the town of Qishui, is a diversion power station. Hub buildings include dams, spillways, water diversion systems, workshops and switching stations. The dam is a concrete face rockfill dam, with the maximum dam height of110.73m, the sixth in China, the crest length of 288m, the crest width of 8.0m, the crest width of 32 1 m, the controlled drainage area of 203 square kilometers, the total reservoir capacity of 96 million cubic meters and the normal storage capacity of 422m. The project is designed according to the 50-year return flood standard and checked according to the 1000 return flood standard. This is a multi-year regulation reservoir. It mainly stores water to generate electricity, and has the functions of flood control, aquaculture and tourism. The workshop is 4 kilometers away from the dam site, and it is a diversion type power generation with a head 144 m and a flow of 29.7 seconds cubic meters. The diversion system is built on the right bank. Gaotang Hydropower Station is a first-class power station, with 680,800 cubic meters of earth and stone excavated for the main project, 53,900 cubic meters of rock excavated for the tunnel, 86,000 cubic meters of concrete and 7,942 tons of steel bars and products. The total investment is 339.2 million yuan. 1993 10, the dam was successfully closed on February 8, 1996 65438, all the units were put into production, with a total installed capacity of 36,000 kilowatts and an annual power generation of 95.5 million kwh.
Yu Tao Hydropower Station is Baishuihe II Hydropower Station, which is 18km away from the resident of Qiashui Town. The design of diversion power station is adjusted every day. The project hub consists of He Lan dam, diversion tunnel, surge shaft, power station, booster station and living quarters. Total investment1.1.50 billion yuan. The He Lan Dam was built in the valley at the foot of Wangtianding Mountain in the middle reaches of Baishui River. The rainwater collection area above the dam site is 243 square kilometers, with an average annual flow of 8.7 cubic meters per second. Connected to the tail water of Gaotang Hydropower Station. The normal water level of the reservoir is 250 meters, with a total storage capacity of 265,438+200,000 cubic meters. The barrage is a stone-filled hyperbolic arch dam with a crest length of11.6m and a maximum dam height of 28.28m The diversion tunnel passes through the hard rock of Wangtianding Mountain with a diameter of 5.5m and a total length of 4.06km.. As a result, 97,000 cubic meters of stone products were excavated. The surge tank is cylindrical with a diameter of 1 1.5m and a depth of 46m.. The shaft wall is lined with reinforced concrete. The power plant is built in the relatively open white slurry tunnel of Qikeng in Baishui River, with a water head of 68m, single machine flow11.05m3/s. The total installed capacity is (3× 6300kW) * * 18900kW, and the annual power generation is 7 1820KWH. 1July 1997, completed in 20001October, 35KV connected to the grid.
Wan Xin Power Station is the third-level power station of Baishuihe Cascade Power Station, 5 kilometers away from Qiashui Town and 12.8 kilometers away from the upstream Yu Tao dam site. The project hub consists of barrage (main dam and auxiliary dam), diversion tunnel, flood discharge tunnel, power station and high voltage switch station. The total investment of the project is 654.38+35 million yuan. The dam site is located in a canyon near Wan Xin Village. The rainwater collection area above the dam site is 273 square kilometers, and the normal water level of the reservoir is 173 meters. The main dam is a masonry gravity dam, with a crest length of 175m and a maximum dam height of 55.70m The auxiliary dam is a water and soil conservation dam, which was built in Zuowan ravine with a crest elevation of 177.4m and a total storage capacity of 60.6 million cubic meters. After completion, the lake is more than 300 meters wide, 700 meters long and 50 meters deep, which is another high gorge Pinghu in Qiashui Town. The design head of the power station is 44.3 meters, the single machine flow is 2 1.3 cubic meters per second, the total installed capacity is (2× 8,000 kilowatts) * *1.6 million kilowatts, and the average annual power generation is 60.25 million kwh. /kloc-0 started in February, 1998, and 80% of the civil works were completed in 2000. Due to lack of funds, construction stopped in the same year.
Niuqi Power Station is located in the middle reaches of Suijiang River and Niuqi Village, Shui Gu Town. Commencement in February 1969, completion in February 197 1. At the same time, the first unit runs at 1000 kW.
In 1990s, Guang Ningxian focused on the cascade development of Shui Gu River. Huashan Power Station was built in 1994, with an installed capacity of 25,500 kilowatts and an adjustable storage capacity of 63 million cubic meters, which plays a significant role in peak regulation of downstream cascade power stations. Driven by Huashan Power Station, Synthetic Power Station, Yonglong Power Station, Daliang Power Station and Hongqi Power Station were successively built. In April 2000, the County Water Conservancy Bureau signed a contract agreement with Liannan Lian Xin Hydropower Development Co., Ltd., and the two sides jointly invested in the establishment of "Guang Ningxian Lianning Hydropower Development Co., Ltd." to jointly develop and construct six power stations in Shui Gu, including Fupai, Luyiping, Wenshui, Shanglin, Guxing and Mengkeng. Fupai Power Station started construction in 2000, with a designed installed capacity of 3,200 kilowatts and a total investment of 30 million yuan. Huaiji
Suijiang River is the main waterway connecting Huaiji County with other counties. The length from Huaicheng to Aozi is 53km, the average width of the river is100m, and the water depth is 2m, which can handle 50 tons of cargo ships (load shedding in dry season). The main stream of Suijiang River can reach Zhongzhou, and the secondary tributary Maning Water can reach Liangcun, Ma Ning and Lanzhou. The secondary tributary Fenggang River flows from Xiangjiaokou to Qiashui, and the secondary tributary Gu Yong River flows eastward from Shidong and Gu Yong to Guang Ningxian Xiakeng and flows into Suijiang River. Before 1957, all the above tributaries can be navigable for wooden boats with a tonnage of 5 ~ 10, with a voyage of about * * * 351km; After 1958, due to the construction of water conservancy and hydropower, ponds, reservoirs and dams were built in the upper reaches of various tributaries. During the period of "iron and steel smelting" and 1978 ~ 1980, forests were cut down indiscriminately, resulting in water shortage, serious soil erosion, increased riverbed and decreased water level. 1985 The tonnage of Suijiang ships was reduced to 30-40 tons.
Guangning
Suijiang River is the main river in this county, which originated from Wuyaling in Lianshan County. It flows through Gushui, Jinchang, Dongxiang, Shi Jian and Chunshui in this county, and exits Sihui stable to join Beijiang River. Before 1958, the channel is100-200m wide and1.2-2.2m deep, which can be used for navigation of barges of 35-40t. In dry season, the width of the waterway is 70-140m, and the water depth is generally about 0.6m, so navigation can only be maintained by manual dredging.
Due to the shallow riverbed and difficult navigation, the river sections in China were regulated and dredged from 65438 to 0958. By the end of 1989, * * 292 stone dams have been built to maintain the navigation capacity of Suijiang River, making the downstream water depth above 0.6m and the upstream water depth above 0.5m in dry season, and 25-30t barges are navigable, with the navigation rate reaching 85%.
Niuqi Shiplock is located in Niuqi section of Shuigu Town, Suijiang River. It was completed and put into use in June1972+1October, 2006. The lock chamber is 85 meters long, the bottom width is 19.5 meters, the upper and lower locks are 1 1.5 meters long and 6.5 meters wide, and the threshold depth is 1.5.
According to the regulations of the Provincial Waterway Bureau, from 1976, a special fund of 16000 yuan will be allocated every year as the cost of gate dredging. 1980, Zhaoqing Economic Commission allocated 90,000 yuan to change the water stop wood of the water wall gate and change the manual gate into the electric gate.
Under normal circumstances, you can open the lock eight times a day. The annual transportation capacity is 6.5438+0.44 million tons. 1October 1972 to February 1987, the floodgates were opened for 30,748 times, with 25.85 million ships, 6187,000 tons of cargo and 0/77.120,000 cubic meters of rafts. The normal maintenance rate of the ship lock reaches 100%.
Sihui
Suijiang River is the main waterway of Sihui. During the Republic of China, four shipping companies, Yongping, Yuehai, Guanghe and Shengli, operated passenger and cargo transportation, with passenger ships 16 and seats 1500, which traveled between Guangzhou, Southwest China, Dongxiang, Shui Gu and Huaiji. From the founding of the People's Republic of China to the early 1960s, the county's passenger transport was mainly by water, with more than 50 "Shuguang/KOOC-0/2/KOOC-0/"and "Shuguang/KOOC-0/22" passenger and cargo mixed carriers/KOOC-0/50. In 1970s, new passenger ships "Red Star 257" (164) and "Red Star 258" (258) were built, which sailed from Sihui to Guangzhou. After 1980s, the riverbed of Suijiang River was enlarged, and the water depth of the main channel dropped from 1.7 m to 1.4 m in dry season, and the channel width narrowed from 10 m to 5-8 m. Due to the shallow water depth of the channel, the passenger ship from Sihui to Guangning was forced to stop sailing on June 4th, 1984. 1985 The passenger route to Guangzhou was also suspended. Due to the increase of land vehicles, water transportation is also shrinking.
Longjiang, a first-class tributary of Suijiang River, originates from Shipai Mountain in Guang Ningxian and flows through Jianglin, Gu Jiang, Longwan, Xia Ju and Qingtang. The mileage of navigable ships is 34 kilometers. In the dry season, the water depth above Xia Ju is only 0.3 meters, so navigation is impossible, and the water depth below is 0.5 meters, so navigation can be maintained all year round. During the Republic of China, it was a prosperous waterway transportation line in this county. From the founding of People's Republic of China (PRC) to the end of 1950s, this waterway was still busy. 1968, originally passing through the central area of sihui town to the downstream of sihui town in xiaohaikou, changed from chengdong district to xiaohaikou. Since the 1970s, the highway transportation along the Longjiang River has become more convenient, the source of water transportation has turned to land transportation, and the waterway has gradually stopped.
Sihui Port, located in Sihui Town in the lower reaches of Suijiang River, has a jurisdiction of 2 km from Canggang to Huangzhizhou, and has 13 affiliated wharves, among which Pier 2 is dedicated for passenger transport (located in front of today's port authority) with a waiting room for passenger stations. When the port was built, the water level of the wharf was deep, with an average annual water level of 6.7 meters and an average dry water level of 5.7 meters. Two100t passenger ships can be parked at the same time. Since 1980s, land transportation has developed rapidly, while waterway transportation has decreased and the Suijiang River bed has been raised. In dry season, the average depth of water level in the port area is only 1.4m, 1.985. The passenger ship stopped, the freight volume decreased, and the port basically stopped using.