Analysis Of Water Conservancy Transition Process Andoperation Safety Assessment Of LXB Water Supply Project

Water was the irreplaceable natural resources,and it’s the basis of human survival and development.However,due to the irrational use and development of human beings,the shortage of water resources threatened the survival of mankind.The United Nations Environment Planning Department had identified freshwater as one of its top five research priorities.The urbanization of population increased the pressure of urban water supply,and the water source around the city could not bear the pressure of the urban population.For this purpose,China had increased investment in water conservancy.Since 2011,the No.1 document from the national central government-Desicion of CPC Central Committee and state council on accelerating water conservancy reform and development was released,China had invested 4 trillion in building large and medium-sized water conservancy projects in ten years.For example,Shanxi water network,Jilin Water Diversion Project,Xinjiang ehe river resource project,Hanjiang-to-Weihe,LXB water supply project and some other large-scale water conservancy projects.These projects had the characteristics of long distance,large tunnel diameter,large water transmission and supply flow,high water pressure,and so on.After completion,they were faced with a series of problems,such as the impact of water hammer wave on the system,how to regulate the flow smoothly,how to deal with the pipe burst accident and so on.Based on the LXB water supply project,this paper established the water hammer equation and water column separation model,settingthe boundary conditions of each working condition,and using the data imported by the computer to calculate the water conservancy transition process of the transmission and water supply system under the normal and extreme working conditions.According to calculation results,suggestions and opinions were put forward for the later operation.In this paper,writer through the engineering examples,combined tunnels,water basins,pipelines,flow regulating valves,air valves,overpressure relief valves,burst pipes and so on for the first time.Establishing the relevant mathematical model,and a set of practical operation guidance suggestions were put forward for the engineering examples.The research results could be popularized in similar projects and guide production to ensure water supply safety.