tingxi reservoir

Tingxi reservoir is located at the foot of Tingxi mountain. The reservoir is located at the foot of Tingxi mountain. It meanders along the mountain and is vast. The surrounding mountains are emerald and meandering, with ups and downs. The mountains and rivers are crisscrossed, so it is particularly leisurely and quiet. Tingxi reservoir is located in the northwest of Tong'an District, only 7km away from the urban area. It is a scenic spot for sightseeing and recreation.

tingxi reservoir

Tingxi reservoir is located in the northwest of Tong'an District, only 7km away from the urban area. It is a water conservancy project integrating flood control, power generation, irrigation, drinking water and breeding. The project is mainly composed of main dam, auxiliary dam, spillway, water discharge tower, water conveyance culvert (pipe), power station behind dam, channel and other ancillary buildings. The project was completed in July 1956. The main dam is an earth rock mixed dam with a crest elevation of 75 meters, a dam height of 44.84 meters, a crest width of 5 meters and a dam bottom width of 249.4 meters. It has a total storage capacity of 48.45 million cubic meters, a normal storage capacity of 37.97 million cubic meters and a dead storage capacity of 340000 cubic meters. Bahou power station was built in 1974, with a total installed capacity of 1760 kW after expansion.

Project overview

Tingxi reservoir is located in Shangpu village of Tingxi town in the northwest of Tong'an District, downstream of Tingxi tributary in Dongxi River Basin. It is one of the earliest medium-sized reservoirs built in Fujian Province, with a rainwater collection area of 100.8 square kilometers (77.4 + 23.4, "rainwater collection area above dam site + rainwater collection area of water diversion project", the same below), a total storage capacity of 48.45 million cubic meters, a normal storage capacity of 37.97 million cubic meters, and a dead storage capacity of 340000 cubic meters. The project is mainly composed of main dam, auxiliary dam, spillway, water discharge tower, water conveyance culvert (pipe), power station behind dam, channel and other ancillary buildings.

Main dam: the dam type is earth rock mixed dam, with crest elevation of 75m, dam height of 44.84m, crest width of 5m, dam bottom width of 249.4m and wave wall height of 1m. The dam foundation anti-seepage type adopts two grouted block stone cut-off wall.

Auxiliary dam: 6 in total, with crest elevation of 75m, total length of 805m, maximum dam height of 7.6m and crest width of 3M.

Spillway: located on the right side of the dam, the pier adopts reinforced concrete structure, and the side wall and bottom plate adopt mortar rubble structure. After the expansion, the practical weir type is adopted, with the crest elevation of 65.66m, the distance from the crest of 9.34m and the net width of 40m. It is equipped with 4 steel mesh concrete arc gates, each of which is 10m wide and 5m high. The gate adopts winch type hand operated electric dual-purpose hoist. Flip bucket is used as energy dissipation type.

Drainage equipment: the water tower adopts the column octagonal reinforced concrete structure, with a height of 40.9 meters, which is used for maintenance. Reinforced concrete pressure pipe with inner diameter of 1.7m is adopted for water conveyance culvert. The hoist room is set at the top of the tower and equipped with hand-operated screw rod wooden gate.

Bahou power station: it was built in 1974, with an installed capacity of 3 sets of 320 kW. After expansion, an 800 kW generator will be added, with a total installed capacity of 1760 kW and a design head of 21.1 M.

Canal: the main canal is built around the mountain from the entrance of the culvert, with a length of 40 kilometers and a designed water delivery capacity of 14 cubic meters per second. The left main canal is 41 km long with a designed water delivery capacity of 2.8 m3 / S; after expansion, it is 44.5 km long with a designed water delivery capacity of 3.1 m3 / s. The right main canal is 22 km long with a designed water delivery capacity of 5 cubic meters per second; after reconstruction, it is 20.5 km long with a designed flow of 3.5 cubic meters per second. There are 41 branch canals with a total length of 300 km; after reconstruction, there are 30 branch canals with a total length of 140.7 km, and the design flow is between 0.1-2.8 cubic meters per second.

Other ancillary buildings: 13 aqueducts, 3 inverted siphons, 26 flood sluices, 9 control sluices, 38 overflow weirs, 23 highway bridges and 142 diversion culverts. After reconstruction, there are 11 aqueducts, 2 inverted siphons, 19 flood sluices, 294 drainage culverts of main canal and 617 drainage culverts of branch canal.

Construction process

In late October 1954, the Water Conservancy Bureau of Fujian Province held a water conservancy administrative meeting in coastal grain producing areas. At the meeting, Wang Deming, head of Tong'an County, put forward the requirement of building Tingxi reservoir. After the meeting, the Provincial Water Conservancy Bureau and the water conservancy branch of Jinjiang District administrative office immediately sent technical cadres to Tongan for survey and preparation of the plan for the construction of Tingxi reservoir. In the middle of November 1955, Cao Yukun, director of the Provincial Water Conservancy Bureau, came to Tongan. Accompanied by Tang Jing, Secretary of the county Party committee, he went to the site to determine the dam site and study the preparatory work. The construction of Tingxi reservoir was approved by Jinjiang District administrative office upon application to Fujian Provincial People's government.

At the end of November 1955, the headquarters of Tingxi reservoir project was established. On December 10, more than 6000 migrant workers in Tong'an County entered the site, built work sheds and built roads. On December 14, they broke the ground and cleared the foundation. Subsequently, Putian, Xianyou, Anxi, Yongchun, Jinjiang, Nan'an, Hui'an and Xiamen were led by a deputy county-level cadre, who successively supported tens of thousands of migrant workers. The garrison supported 400 officers and soldiers and more than 20 vehicles. All walks of life, all townships and all Li in the county have worked together to solve the problems of labor, materials, equipment, grain, non-staple food, means of transportation, site lighting and so on, to support the construction of Tingxi reservoir. There are more than 40000 people working on the dam site, working day and night, rain or shine, and various forms of labor competition. At the end of January 1956, the foundation clearing was finished and the culvert and water tower were poured. Filling and construction of spillway started in early February. Due to the rainy season, the water in the stream rises sharply. In order to overcome the flood, the construction organization speeds up the construction progress. The daily soil volume exceeds 5000 cubic meters, and the filling thickness is 60 cm. On April 5, a 37 meter high dam was built and a water supply meeting was held at the construction site. At the end of July, the main canal and left and right main canals were completed, marking the completion of Tingxi reservoir project. The total investment of the project is 3.9 million yuan, the labor force is 3 million working days, and the earthwork is 2.45 million cubic meters and the stonework is 28000 cubic meters.

Dam protection and reinforcement

From September 18 to 20, 1956, the spillway was attacked by rainstorm and flood, the right side wall of the spillway was destroyed, and more than 80 channels burst. During the winter and spring repair, the people's Committee of Tong'an county organized the community team of the benefit area to repair the water damaged project, and carried out the channel construction. The main work includes: building the spillway hoist room, installing the gate, and building the side wall of the steep slope section; opening 15 branch canals and 283 Dounong canals, so far, all the canal system buildings have been completed; installing 35 flood discharge gates, control gates and other equipment and 215 culvert gates on the main canal .

Because the 13 aqueducts on the main canal were of pine structure at the beginning of construction, they rotted seriously after 3 years of operation, which affected the irrigation efficiency. From the end of 1959 to the summer of 1962, more than 100 cadres and workers from the water conservancy system of Tong'an county formed a professional team for rebuilding aqueducts. They personally opened, lifted and built stones. In two years, 13 pine aqueducts with a total length of 646 meters were rebuilt into stone arch aqueducts (including Ma Xiang aqueduct with a length of 120 meters and Dongshan aqueduct with a height of 13 meters), with a total investment of 225000 yuan and labor force of 21100 working days.

In November 1961, the dam was heightened and completed at the end of 1962. The height of the dam was increased from 37m to 38m, and a wave wall with a height of 0.8m was built. In the summer of 1963, the excavation of the 6 km Xiling diversion canal was completed, bringing the water from the Xiyuan tributary across the basin into the reservoir, with a diversion capacity of 0.5 cubic meters per second.

In the winter of 1963, the movement of "changing dry land into paddy field" was launched in the irrigation area, which greatly expanded the irrigation area. The reservoir management office has formulated plans for 16 key projects, including the renovation of trunk and branch canals. In the case of shortage of water conservancy construction funds, the 45000 yuan subsidy actively allocated by the Provincial Department of water resources and electric power was returned, and the representative meeting held in the irrigation area decided to complete the supporting projects on their own. During the winter solstice and the spring of the next year alone, they raised 250000 yuan in 10 communes and volunteered to work. After three months of hard work, all 16 key projects were completed, and 784400 cubic meters of earthwork were completed. The 16 key projects include the deep excavation and improvement works on the well of the main canal; the left and right main canals are widened from 0.8m to 1m; the eighth, tenth, eleventh, twelfth and twenty-first branch canals, the Meishan Branch Canal, the first branch of Liantang and the second branch of Liantang are widened, filled and extended; 60 new Dou and Nong canals are opened, with a total length of 179km. In the spring of 1964, 28 production teams of 6 production brigades irrigated the water of Tingxi, and the dry land of 16 hills was changed into paddy field, and the irrigation area was expanded to 164000 mu.

In 1965, the CPC Tongan county Party committee and the county people's Committee decided to expand the Tingxi reservoir dam, raise the design flood control standard from once in 30 years to once in 50 years, increase the storage capacity by 10 million cubic meters, and build a 960 kW power station behind the dam. The provincial water resources and electric power department listed the expansion as a provincial infrastructure project, which was designed by Fujian Water Resources and Electric Power Survey and Design Institute. In November 1965, the people's Committee of Tong'an county set up the headquarters of Tingxi reservoir expansion project, which was composed of migrant workers' squadrons from the beneficiary communes and entered the site on November 25. In the first half of 1967, the project was basically completed.

In March 1970, the construction of Bahou hydropower station started and was completed in June 1974. The design head of the power station is 21.1 meters, the installed capacity is 3 × 320 kW, and a dormitory is built.

At 13:00 on July 1, 1971, the reservoir discharged 640 cubic meters per second, the rocks on the steep slope section of the spillway collapsed under the impact of water, and the natural stilling basin scoured 21 meters deep. In 1973, the renovation was carried out, and the reinforced concrete floor was poured in the steep slope section, and the flip bucket was built to dissipate energy.

In the winter of 1975, it put forward the idea of "stone"

Chinese PinYin : Ting Xi Shui Ku