Tangxi reservoir

Tangxi reservoir is located in the middle mountain area of Raoping County. It was completed at the end of 1960. Because the reservoir area was built in Tangxi, it was named. The catchment area is 667 square kilometers, and the maximum storage capacity is 381 million cubic meters. Tangxi reservoir, also known as Raoping North Lake, is located in the middle reaches of Huanggang River, 38 kilometers away from Huanggang county. It was built from November 1958 to December 1959. The lake area is adjacent to Zhujing in the northeast, Huaqiao hot spring in the south, Taoyuan cave in the West and sanraota mountain in the north, with an area of about 40-50 square kilometers, of which the water area is 200000 square meters and the water storage capacity is more than 280 million cubic meters. It is the largest artificial lake in Chaoshan area. Surrounded by mountains and emerald peaks, the lake is shimmering. The original 72 peaks are now all islands. Floating on the lake, the scenery is enchanting. The climate is suitable and the transportation is convenient. It is a well-known tourist attraction. In the 1960s, Tao Zhu, Secretary of the Guangdong provincial Party committee of the Communist Party of China, inspected the site and wrote the inscription himself. Ying Yeping, a famous painter from all over the country, also visited here, leaving a batch of paintings and calligraphy on the spot. Since the 1980s, the lake district has set up special tourism service agencies, equipped with a number of yachts; around the hydropower station, rockery fountains, animal corridors, cultural rooms are added; and there are elegant restaurants, teahouses and guest houses for tourists. There is an endless stream of tourists in the four seasons. Through the boat, you can see 72 peaks of surrounding mountains, including Yingshan, Taoshan, Liyu Island, etc. The mountain shadow reflects the surface of the lake, the yacht is flying, the cool wind is cool, especially refreshing.

Tangxi reservoir

Tangxi reservoir is located in the middle reaches of Huanggang River in the north of Raoping County. It is mainly for irrigation and flood control, and has comprehensive benefits such as power generation and fish culture. The catchment area is 667 square kilometers, with a total storage capacity of 378 million cubic meters. Construction started in September 1958 and completed in December 1960. After reconstruction and reinforcement for many times, the pressure pipe, main and auxiliary dam, spillway gate and nose sill were treated and improved successively until the spring of 1984.

Reservoir characteristics

The main and auxiliary dams are homogeneous earth dams, with a maximum height of 43 meters and a crest length of 452 meters. They are filled successively by dumping soil in water and rolling method. One auxiliary dam, located in the right bank depression, has a maximum height of 35m and a crest length of 327m. The spillway is located on the right bank, with a net width of 50m, and is controlled by 5-hole steel radial gates with a width of 10m and a height of 7.5m for each hole. The designed maximum discharge is 3570m3 / s. The water conveyance tunnel is located on the right side of the main dam, with a section diameter of 2.7 meters. The maximum designed water conveyance flow can reach 50 cubic meters per second. The total installed capacity of Bahou power station is 7220 kW. The reservoir inundated 10200 mu of cultivated land and relocated 6041 people. The total project cost is 16.59 million yuan, of which 9.405 million yuan is invested by the state. The designed irrigation area is 142300 mu, and the effective irrigation area is 106200 mu.

The spillway is located on the right bank of the main dam, with a clear width of 18.4 meters and a crest elevation of 33.81 meters (the normal high water level of the reservoir is 34.81 meters). Reinforced concrete radial gate is set up, and the designed maximum flood discharge is 317 cubic meters per second.

engineering construction

The construction of the reservoir started in November 1958 and was completed in January 1961. 960000 cubic meters of earthwork, 48900 cubic meters of stonework and 5100 cubic meters of concrete were completed. The reservoir area inundated 21500 mu of cultivated land and relocated 11400 people. The total project cost is 7.47 million yuan, including 5.36 million yuan invested by the state. After the completion of the reservoir, after years of operation, maintenance and reinforcement, the project has become increasingly perfect, and the irrigation area has expanded to 145700 mu. The irrigated area used to be a bitter and arid area, with grain yield less than 100 kg per mu. Magang District, in particular, suffered the most severe drought. It can only eat grain for five or six months a year, and the relatively wealthy farmers only live a life of "seven potatoes and three meters" (70% coarse grains and 30% rice). After the completion of Dashahe reservoir, 90% of the farmland can be irrigated by gravity, and the grain is self-sufficient. The grain yield per mu in the irrigated area exceeded that of Yanghe River in the drought year of 1977. It is a large reservoir with comprehensive utilization of power generation, flood control and fish culture. The catchment area is 429 square kilometers, with a total storage capacity of 152 million cubic meters.

History of the lake area

It was built from November 1958 to December 1959. The lake area is adjacent to Zhujing in the northeast, Huaqiao hot spring in the south, Taoyuan cave in the West and sanraota mountain in the north, with an area of about 40-50 square kilometers, of which the water area is 200000 square meters and the water storage capacity is more than 280 million cubic meters. It is the largest artificial lake in Chaoshan area. Surrounded by mountains and emerald peaks, the lake is shimmering. The original 72 peaks are now all islands. Floating on the lake, the scenery is enchanting. The climate is suitable and the transportation is convenient. It is a well-known tourist attraction. In the 1960s, Tao Zhu, Secretary of the Guangdong provincial Party committee of the Communist Party of China, inspected the site and wrote the inscription himself. Ying Yeping, a famous painter from all over the country, also visited here, leaving a batch of paintings and calligraphy on the spot. Since the 1980s, the lake district has set up special tourism service agencies, equipped with a number of yachts; around the hydropower station, rockery fountains, animal corridors, cultural rooms are added; and there are elegant restaurants, teahouses and guest houses for tourists. There is an endless stream of tourists in the four seasons. Through the boat, you can see 72 peaks of surrounding mountains, including Yingshan, Taoshan, Liyu Island, etc. The mountain shadow reflects the surface of the lake, the yacht is flying, the cool wind is cool, especially refreshing.

Features of scenic spots

Tangxi reservoir, located in the Tropic of cancer, is a large water supply reservoir in the east of Guangdong Province. Since 1997, cyanobacteria blooms occurred frequently in October to November, but in 2003, cyanobacteria blooms occurred in July ahead of time. The main factors affecting the occurrence of cyanobacteria blooms were analyzed, and the reasons for the early occurrence of cyanobacteria blooms in 2003 were discussed. The nutrients of Tangxi reservoir mainly come from the surface runoff formed by the precipitation in the basin, in which there is more precipitation in May, and the input of nutrients in the reservoir is large; the growth of phytoplankton in the reservoir is not limited by N and P nutrients, and has the N and P nutrient basis for the occurrence of cyanobacteria bloom. From April to November, the surface water temperature of the reservoir is 25 ~ 35 ℃, which is suitable for the occurrence of cyanobacteria bloom. The water temperature has a significant correlation with the abundance of cyanobacteria and Microcystis. Higher water temperature is one of the important conditions for the occurrence of cyanobacteria bloom. Under the condition of sufficient nutrients and suitable water temperature, water stability is the key factor to control the occurrence time of cyanobacteria bloom in Tangxi reservoir. The annual precipitation in 2003 was only 76.8% of the annual average, and the precipitation in July was only 64mm, which was far less than the precipitation in the same period of previous years. The abnormal water stability in the flood season led to the occurrence of cyanobacteria bloom in advance.

Travel Tips

Best travel time

May October

Traffic routes

Ordinary highway: take Tiejing line, about 50m after crossing Huanggang River Bridge, turn left (towards Sanrao) and go straight for more than 20 km.

High speed: Shangshan Fen high speed, Xiamen, Huanggang exit, turn left (North) straight, about 20 kilometers.

Address: Raoping County, Chaozhou City, Guangdong Province

Longitude: 116.623417

Latitude: 23.656722

Chinese PinYin : Tang Xi Shui Ku