General situation of water conservancy in yi river

Yi river originated in Yiyuan County, Shandong Province, with two sources: north and west. The northern source comes from Sanfu Mountain in the southwest of Lushan Mountain in Yiyuan County, and the western source comes from Dazhangzhuang River at the northern foot of Laoshan Mountain at the junction of Yiyuan, Mengyin and Xintai counties (cities). Zhangzhuangcun River is the main source of Yihe River. Beiyuan and Xiyuan meet in the southwest of Yiyuan County, flow south through the west of Yishui County in the southeast, pass through Yinan, Linyi, Cangshan, Tancheng and other counties (cities), and enter Jiangsu in Wudaokou Village of Cheng Zheng County. Yi river is divided into two tributaries in Jiangsu, with the main stream of yi river in the east and Lake Rome in the south. West shares are old yi river, and the gate has been built in Jiangsu Province. The Yihe River in Shandong is 287.5 kilometers long with a drainage area of 10772 square kilometers.

According to historical records, the governance of the Yihe River began in the Ming Dynasty. 1464 (the eighth year of Tianshun), Yisi dike and Lukou rockfill dam in Pizhou were built. 1699 (thirty-eight years of Emperor Kangxi of the Qing Dynasty), the two banks of the Yihe River were built * * * more than 16,800 feet. 1743 (eight years of Qianlong), Yisi dike and Lukou rockfill dam in Pizhou were built. 1747 (the 12th year of Qianlong), dredged the Liuer River and Weihe River in Tancheng, built the masonry dam and Lukou gravel dam at the mouth of Lanshan River (Linyi County), dredged the Yihe River and repaired the embankment. These measures are mainly aimed at dredging Iraq's economic transportation, ensuring the safety of the canal and preventing waterlogging in the Yi River. During the Republic of China, in 19 12, Zhang Jian, director of the State Water Resources Bureau, compiled the construction plan of Yishui into the sea. 1946 The Planning Outline of Yimeng Mountain Area compiled by the Provincial Construction Department also proposed to control the Yi and Shu rivers. But none of them have been implemented.

After the founding of the People's Republic of China, the large-scale management of the main stream of the Yi River can be divided into three periods: 195 1 to 1953. The main stream of the Yi River is mainly constructed by embankment construction, dredging, bend cutting, beach cutting, bank protection, and diversion canal into Shu. 1954 to 1958, focusing on the construction of sluices at the estuary of the river, expanding the excavation of the diversion channel, pigang flood diversion channel and some construction projects; 197 1, Yishu river flood diversion project started, and the project stopped at 198 1.

Dredging, dike improvement and risk protection works

195 1 April to1May, 953, during the whole interpretation project, the dredging and embankment construction were carried out at the speed of 6000m3 per second near Linyi and yi river and 3500m3 per second below Li Jiazhuang, with Yanjiakou to Wudaokou on the left bank and Tangxia ditch to Wudaokou and Tangxia on the right bank. Wuhekou Spillway, Xinmohe Seven-hole Bridge and Xiaozhangzhuang Hong Zhong River are excavated for 5.6 kilometers, and the whole embankment at 1 1 is 3,965 meters. * * * 3.37 million cubic meters of earthwork was completed, and the actual man-days were 6.5438+0.85 million, and the actual payment was 4.09 million Jin. After renovation, the flood discharge capacity above Li Jiazhuang reaches 8,000 cubic meters per second, and below Li Jiazhuang reaches 5,500 cubic meters per second. 1

1957, the flood peak measured at Linyi Station reached 15400 cubic meters per second. 1958, the main stream of yi river, near Linyi City, 15400, Liujiadaokou to Li Jiazhuang, 12000, below Li Jiazhuang, 8,000 cubic meters per second, 1 10 km for dike repair, dike top. 1964, calculated according to the flood peak near Linyi 15400 cubic meters per second, the main dike of Yihe River 188 km, and the stone revetment is 0.9 km. Since the founding of the People's Republic of China to 1985, the main stream of the Yi River has been rehabilitated for 235.3 kilometers, including 1 18.5 kilometers on the left bank, 1 16.8 kilometers on the right bank and 36.2 kilometers on 70 stone revetments.

Interpretation of Chengdu-Sichuan waterway excavation separately

Fenyi Waterway is a drainage channel excavated from the left bank of North yi river, Liudaokou Village, Tancheng County to Laoshu River west of Daguanzhuang, Linshu County, which discharges the flood in yi river to Laoshu River in the east. The length of water diversion into Lishui River is 19.5km, which started in April of 195 1 year and was completed in July of 1952. According to the flood peak of 6,000 cubic meters per second in Linyi City, 1 1,000 cubic meters per second is discharged into Shuhe River. The designed river bottom is 98-206m wide, the mouth is106-223m wide, the excavation depth below the ground is 2-2.5m, and the dike distance is 260-410m. At the same time, 27.3 kilometers of drainage ditches were excavated, 6.3 kilometers of villages were built, and bridges and culverts 10 were built. Completed earthwork of 410.9 million cubic meters, stone excavation of 0.9 million cubic meters, 3 million actual man-days and salary of 5.93 million kilograms (millet). At that time, due to the lack of data, the calculation was inaccurate. 1953, when the flood peak in Linyi is 6000m3/s, only 405m3/s can be diverted, which is less than half of the design standard.

1954, the diversion canal was expanded, that is, the Yihe River discharged 1000 cubic meters per second at a flow rate of 6,000 cubic meters per second near Linyi City, and it also merged with the flow rate of Huangbai drainage ditch on the main slope 132 cubic meters per second and the flow rate of 78 cubic meters per second from Zhucun to Dashao drainage ditch. When the flood in Linyi City is 8500-9200 cubic meters per second, the corresponding flood diversion amounts are 1565 and 1730 cubic meters per second into the Shuhe River. Shit! Construction of Lu Yi Special Economic Zone. 1955 completed the expansion of Huang Zhuang, Zhucun and Houhekou rivers and three revetments, rebuilt two culverts at Dadun and Hanbu, added small piers and paved with stones.

1956 completed the expansion and excavation of all waterways, and completed seven projects, including Dadun, two overflow bridges in Huang Zhuang, stone paving of Yixin Highway, inlet revetment, Huang Zhuang, two culverts falling into water in Dashao, and stone paving in Wang Yu city. The above project * * * completed earthwork of 5 1.5 million cubic meters, masonry1.0 million cubic meters, concrete of 756 cubic meters, 3.75 million man-days, and the state invested 4.46 million yuan. The elevation of the river bottom at the entrance of the waterway is 56 meters, and the elevation at the end is 47.5 meters. The river channel is a compound section with a bottom width of100 ~160m, an underground depth of about 2.5m and a dike distance of about 280m. After the water diversion project 1956 was expanded into Shu waterway, 14 diverted the flood. When Linyi 1957 flood peak 15400 cubic meters per second, the maximum flood diversion flow is 3 180 cubic meters per second, which meets the design requirements.

Jiangfengkou flood diversion gate and Picang flood diversion channel

Jiangfengkou, also known as Wuhekou, is the water inlet for diverting water from Yi in Qing Dynasty. There were stone dams and stone wraps in Qianlong period, which were abandoned in the Republic of China. Before the founding of the People's Republic of China, the estuary was unable to control the flood diversion flow, which harmed Picang area. After the establishment of People's Republic of China (PRC), the Jiangfengkou flood diversion gate was built in 1954 to alleviate the 800,000 mu flood disaster in Cangxian, ensure the flood safety below Li Jiazhuang in yi river and reduce the flood threat of Longhai Railway. Chengmen Site is located in the northwest of Wang Sha Gou Village, Tancheng County. The project started in June 1954 1 1 and was completed in June of the following year. The designed flood diversion flow is 2000 cubic meters per second. Reinforced concrete structure with 7 radial gates, gate height of 6.5m, total gate length of 96m, traffic bridge load of 8t, bridge deck width of 4.3m, project investment of 3.43 million yuan, earthwork of 6.5438+0.28 million cubic meters, stonework of 23,000 cubic meters, and concrete and reinforced concrete of 6.5438+0./kloc-0.00 million cubic meters. After the completion of the sluice, the flood was divided for 9 times, 1957, and the flood was 3380 cubic meters per second, which was normal. Some problems have emerged and these problems have been strengthened.

Picang spillway, also known as Wuhe spillway, is the spillway under Jiangfeng sluice. Part of it is the original five-river channel, and part is the newly excavated channel. It flows through Linyi, Tancheng and Cangshan counties, enters Jiangsu in the west of Xu Qiao Village in Cangshan County, and joins the Central Canal in Liulinzhuang. It has a total length of 77 kilometers, 40 kilometers in Shandong, and 76 villages in 8 towns along the river. Check the flood flow of 3000 cubic meters per second. The flood diversion channel from the flood diversion gate to Duofuzhuang is the original five-river channel, and banks are built for flood discharge. Dufuzhuang to the provincial boundary, digging a river to build a dike, the distance from the flood diversion sluice to the Xiezishan levee gradually changed from 600 meters to 1 km, from Liaotun to Shabu to 1 km, and from Lutang to 1.5 km, and entered Jiangsu. The dike is 3 ~ 4m high, 2m wide under Jiangfengkou sluice 12km and 8m wide below 12km. There are Shenni River, Xinsu River, Chengzi River and Yanzi River on the right bank and Xiaosu River on the left bank. There is a flood diversion gate at the river sluice of Duofuzhuang on the left bank, with a design flow of 200 cubic meters per second. 1in April, 957, Sulu and Jiangsu provinces agreed to control the flood diversion flow to 84 cubic meters per second and enter the Five Rivers. The project is constructed in two phases (1957 and 1958). Due to the poor quality of the flood dike, it was strengthened and renovated in winter and spring (1963, 1964). The left bank is 42.4 kilometers from Jiangfengkouzha to Xu Qiao, and the right bank is 40.2 kilometers from Jiangfengkouzha to Pangzhuang. There are 23 culverts, 9 irrigation and drainage stations and stone slope protection1.48km.. By the end of 1985, the state had invested 7.76 million yuan to complete 5.6 million cubic meters of earthwork and 4.37 million man-days, and the flood discharge capacity reached 3,000 cubic meters per second. This river has not been flooded since 1974, and the people are paralyzed. They dig dikes to borrow soil, steal materials and grab culvert equipment, and plant trees to dam water, which will cause hidden dangers of flood diversion.

Extension project of water diversion channel into Shu

It is a part of the flood diversion project of Dongyishu River. Yishu River flood diversion project is to introduce Yishu River flood into Shuzhong waterway, and Xinshu River flows eastward into the sea. The project includes: introducing the waterway in the middle of Shu and expanding the new Shu River; Liudaokou Turnover Project of Yihe River (consisting of Liudaokou control sluice, Pengdaokou flood diversion sluice, power station and drainage culvert); Shuhe Daguanzhuang Hub (composed of Shuhe People's Victory Weir Control Gate, Xinshuhe Flood Discharge Gate and Power Station); Re-embankment, risk protection, seepage interception, irrigation works, main drainage works and ancillary works in the backwater section of Yishu River. The Yishu River flood diversion project started in 197 1 year1month, and 560,000 migrant workers from 9 counties (cities) in Linyi area, provinces and Linyi areas and the Nansihu Water Conservancy Project Construction and Installation Team participated in the construction. 19 reached 19865438 after the station was built. Pengdaokou flood diversion sluice and Xinshuhe flood discharge sluice have been completed, and the diversion open channel expansion, Xinshuhe expansion and main drainage projects have been completed.

The expansion project of Fenyi Waterway into Shu started in 197 1 year1month, and was completed in the spring of 1977 after the construction of 12. The length of the river extending from Pengdaokou to Dadun is 8.5km, from the original width of170m to 200-210m, and the depth of1~ 2m. The dike was built by digging a river, and its top is 6 meters wide. Three traffic bridges, Hanbu, Dadun and Huang Zhuang, were built, and Yixin Highway Bridge was reinforced. * * * Earth and sand 1.48 million cubic meters, stone 3.65 million cubic meters and masonry 1.9 million cubic meters were completed, and 6 1.9 million person-days were completed, with national investment 1.2 1.4 million yuan. The original plan to lead it into the Shu waterway and then into the Xinshu River was not realized due to the suspension of the East Transfer Project.