120-Day Battle: Chenghai Emergency Water Supply Project in Yongsheng County, Liugongbu Successfully Completed

9 Month 24 At 0:40 on the day, as the river water gushed out from under the "Jinsha Lishui" stone tablet at the outlet, the Yongsheng County Chenghai River Basin Ecological Comprehensive Governance Water Conservancy Emergency Water Supplement Project of the Sixth Engineering Project Department was successfully put into operation, marking a major turning point in the governance of Chenghai Lake and ushering in a new starting point for the comprehensive ecological governance of Chenghai Lake water.

9 Month 14 Day, in accordance with the requirements of the Group Company, the Company, and the Command Center, the project department held a project promotion meeting to convey the spirit of the Group Company's mobilization and deployment meeting on "riding the momentum, fighting a great battle 120 Day, to ensure that the annual target tasks are overfulfilled." The meeting clarified the node target tasks and strived to achieve manual debugging and water delivery within ten days, supplying high-quality water from the Jinsha River to Chenghai Lake on time. The meeting required all participants to work together to ensure water delivery, continue to carry forward the spirit of the Jianshe people's "particularly able to endure hardship, particularly able to fight, particularly able to dedicate, dare to fight tough battles, good at fighting tough battles, and able to win battles" plateau iron army spirit, strictly implement the Group's "four guarantees, one control, and one tree" management requirements, and fight a battle with their backs to the water on the front line of the project.

After days and nights of hard work, the various cascade pumping stations along the line completed the fine adjustment of the units, the debugging of the automatic monitoring system, the pressure test, and the test water lifting test, 9 Month 23 Day, all cascade pumping stations and pipelines were ready for linkage debugging. Under the unified coordination of the command center, 9 Month 23 Afternoon on the day 18 Point, the project department took the lead in starting the first-level floating dock pumping station 1# Unit to pump water to the second-level pumping station intake pool, 18 Point 20 Minutes to start the second-level pumping station 1# Unit to pump water to the Dong'an high-level water pool, the river water along 10.3km The Huangjinwan inverted siphon flows to the intake pool of the third-level pumping station, and finally on 9 Month 24 Day 0 Point 40 Minutes flowed to the outlet of Chenghai Lake, and the Chenghai emergency water supplement project was successfully put into operation.
   The Yongsheng County Chenghai River Basin Ecological Comprehensive Governance Water Conservancy Emergency Water Supplement Project is a key provincial demonstration project in Yunnan Province and also a lifeline project for the protection of Chenghai. The construction of the project will effectively curb the continuous decline of the Chenghai water level. Through the implementation of the water conservancy backbone project, the production and living water in the Chenghai River Basin will be replaced, and water will be directly supplemented to the Chenghai ecosystem to improve the ecological environment of Chenghai Lake water.

The water source for the project is the Ludila reservoir area of the Jinsha River, in 220 Downstream of the Jinjiang Bridge on Provincial Highway 3.1km The left bank of the Jinsha River takes water, and the water source point is located upstream of the outlet of the Tu'erqing River 560m ，Water is taken and transported to the intake pool of the second-level pumping station through the first-level floating dock pumping station (normal water level is 1300m ），The water is lifted to the mountaintop sedimentation and purification pool by the second-level pumping station (normal water level is 1419m ），Then, gravity pressurized water transmission is formed, and after passing through 10.03km Pressurized pipeline (Huangjinwan inverted siphon) successfully transports the river water to the intake pool of the third-level pumping station (normal water level 1400m ），The project department successfully completed the first two levels of pumping stations and water transmission tasks of the third-level pumping station of this project. Then, the third-level pumping station constructed by the neighboring unit lifts and pressurizes the water to 350m Caojia Village outlet pool on the west side of Caojia Village (normal water level 1561m ），Using the Caojia Village outlet pool, water is transported to the left side of the Sanjiaotang through a gravity pressurized pipeline (Majun River inverted siphon) 330m Majun River, the design flow rate of the main line is 2.34m³/s 。After 8 Hours of load water linkage debugging, on 2020 Year 9 Month 24 At 0:40 on the day, the Jinsha River water from the Ludila reservoir area was successfully supplemented to Chenghai.

First-level floating dock pumping station

Outlet "Jinsha Lishui" stele

Second-level pumping station main plant

River water to Dong'an high-level water pool

[Six Engineering Department / Wang Yao]