General situation of Longjiang water conservancy

Tianbaopi, located in Guanyinpu Village, Lu Hong Town, was built in Tianbao period of Tang Dynasty (742 ~ 755), with a rainfall collection area of 85 square kilometers. Tianbao North Diversion Dam is made of river pebbles, with a length of 219m and a height of 3.5m.. In the Song and Yuan Dynasties (1098), Rouzheng, a magistrate of a county, organized personnel to rebuild the canal, with molten copper as the solid foundation, and repaired the canal for more than 2,000 meters. Irrigation Haikou Silverstream went downstairs to the fields with five fish and ten oceans. In the fifth year of Xianfeng in Qing Dynasty (1855), it was rebuilt again and was once named Xianfeng Dam. During the Republic of China, the government did not pay attention to farmland water conservancy and lacked self-restraint. In 34 years of the Republic of China (1945), Tianbaopi dam dug a gap to drain fishing, which led to the flood in the following year and the gap was even bigger. At that time, the government blocked the gap with bamboo baskets and perfunctory things. In 37 years of the Republic of China, the Fujian provincial government claimed to allocate 6 billion yuan (golden roll) to rebuild Tianbaopi, but in fact it only allocated 500 million yuan, most of which were pocketed by the rich and powerful, but it was not actually completed. 1950, the people's government strengthened and rebuilt Tianbaopi. The national loan was 3.825 billion yuan (382,500 yuan). The outer slope of the dam was changed into a mortar stone roller dam, and 8000 mu was irrigated. 195 1 established Tianbaopi Water Conservancy Management Committee, equipped with specialized personnel to strengthen the management and maintenance of the project. In the past 30 years, after several reconstructions, the normal water intake is 65438 0.5 cubic meters per second. The villages of Yinxi, Lu Hong, Haikou 17 and Dongge Farm benefited, with an irrigation area of 1.36 million mu, supplying water to seven industrial units such as Fuqing Sugar Factory and Bayi Iron and Steel Plant.

Taichengxi Water Diversion Project,1In April, 1970, Taichengxi Water Diversion Project was completed, and every year,16-20 million cubic meters of water was diverted into Dongzhang Reservoir. Taichengxi is a tributary of Longjiang River, and the available rainwater collection area is 39.5 square kilometers above Jingyang Gancuo. In dry season, the annual water volume is 254 1 1,000 cubic meters, in normal season, the annual water volume is 32.05 million cubic meters, and the annual average flow rate is about 6 cubic meters per second. The diversion project includes a sluice and a diversion channel. The sluice is built at the narrow mouth of the stream 200 meters south of Gancuo Bridge, and it is a weathered rock foundation. The left bank is a field, and the right bank is close to Fuxia Highway. The sluice is designed according to 10 once-in-a-year flood, and checked by once-in-a-century flood. ***6 holes, of which 5 holes have a clear width of 5m, 1 hole has a clear width of 3m, and the total clear width is 28m. The five gates adopt reinforced concrete arch structure, and five10t double-head synchronous hoists are set. One is reinforced concrete flat door and 1 5 ton spiral elevator. The water diversion channel is 3 kilometers long. About 10 meter south of Gancuo Bridge, the channel adopts three forms: digging open channel, building stone pipe culvert and digging tunnel. Among them, the open channel is 593 meters long, the stone pipe culvert is 832 meters long, and the tunnel passes through the northern foot of Taichengling, with a length of 1445 meters. The total earthwork volume of this project exceeds125000m3. The state invested 387,000 yuan and 6,543,800+065,000 man-days. After the completion of the project, it played an important role in irrigation in Longtian and alpine regions. The project has less investment, no land occupation, no immigration, low management cost and benefits equivalent to a medium-sized reservoir. Haikou Longjiang Bridge, located in the west of Haikou Village, Haikou Town, Fuqing City, spans Longjiang. It was built in the third year of Song Zhenghe to the sixth year of Xuanhe, and it has been restored in all dynasties. Stone bridge, across the Longjiang River in Haikou, runs east-west, with a length of 476 meters and a width of about 4.6 meters. There are 39 piers with 40 holes, 9.2 meters long, 6 meters high and 3.6 meters wide. The bridge is paved with 9.5 meters, 0.67-0.75 meters wide strips, and the two ends are buckled and overlapped. A pair of octagonal seven-story pavilion-style solid stone towers stand at the bridge head, with a height of 5.05 meters. On both sides of the tower wall, there is a sumeru, a gourd brake top and a relief Buddha statue. 196 1 year, Fujian Provincial Ethnic Affairs Commission announced Haikou Longjiang Bridge as the first batch of provincial-level cultural relics protection units, and in 20 13, it was announced as the seventh batch of national key cultural relics protection units.

Liqiao is located on the west side of Ruiyun Tower in Fuqing County, Fujian Province, across the Longjiang River. Liqiao (commonly known as Longshou Bridge), also known as Ruiyun Bridge, was listed as a county-level cultural relics protection unit in 1987. The original site of Liqiao is outside the south gate of the county seat, on both sides of Longjiang River. It was founded in the fifth year of Song Tiansheng (1027) and rebuilt in the second year of Yuan Dynasty (1322). In the early years of Wanli in the Ming Dynasty, the county magistrate Xu Mengxiong presided over the renovation. Because the bridge goes straight to the south gate, facing the county government, it is taboo for Kanyu. Ye's son and the elders in the county suggested to Ling Hanzhong, the county magistrate, to move the bridge to Xiaogushan, which is now the bridge site. Ruiyun Tower is built at the bridge head. The bridge was relocated in the winter of the thirty-fourth year of Wanli in the Ming Dynasty (1606) and ended in the autumn of the forty-third year of Wanli (16 15), which lasted for nine years. This bridge was also designed and built by Li Bangda. This bridge is183.3m long and 5m wide, with 19 gates. The stone pier of Shiliang Pingliang Bridge is 32-70cm wide and 33-40m thick. Liang Shi is mounted on a hat stone, which is double-layered, with 35 meters hanging at both ends of each floor. Each pier and each floor are paved with 13 Liang Shi in parallel. The pier is 2 meters wide and 5.2 meters long, with water diversion tips at both ends. Unequal span, digging foundation under pile. After the relocation of the bridge, although it was repaired in Kang Yong during the Qing Dynasty, it was destroyed at the southwest end of the bridge because of its age. In 1958, a wooden beam and a wooden bridge deck were erected on the original Liang Shi, which was transformed into a splayed abutment on the basis of the original pier 10, and eight holes were compressed to become the current ten-hole bridge. 1980 reinforced concrete caps are added to the original platform, and cantilever reinforced concrete pier caps are designed on the original piers. The superstructure is an assembled reinforced concrete hollow slab with a total length of 90.8 meters and a clear bridge deck width of 7 meters.