Development process of management The concept of water conservancy project management is gradually formed in the process of people's long-term practice. With the change of the times, the specific contents and methods of management are constantly enriched and improved. Many countries have entered the stage of modern management, adopting modern scientific and technological theories and modern means to manage water conservancy projects. The ancient "Ministry of Water" was a water conservancy project management law promulgated and implemented in the Tang Dynasty, which clearly stipulated the irrigation system, water distribution ratio, project maintenance and management administration. In the early 1950s, when a number of newly-built reservoirs and sluice dams were put into use, corresponding management institutions were established in addition to retaining the original management institutions for river dikes and dams. In order to carry out project management and make it have rules to follow. 1954 select Guanting Reservoir and Sanhe Sluice, formulate management specifications, distribute all kinds of project management specifications nationwide, hold training courses, and improve management level. 1956, in order to facilitate hierarchical management, the classification standards of reservoirs and sluices are divided. In the early 1970s, international organizations treated the water pollution of Guanting Reservoir in Yongding River. Since then, water quality protection has been added to the management of water conservancy projects. In the late 1970s and early 1980s, the scope of technical management was broken and the concept of management was further developed. It is stipulated that the management task of water conservancy project is "safety, benefit and comprehensive management"; The task of hydropower station is "safety, economy, more power generation and more power supply". 1983, the national water conservancy conference formulated the water conservancy work policy of "strengthening management and paying attention to economic benefits", and the water conservancy work resolutely turned to the track of improving economic benefits, requiring strengthening management of existing projects, carrying out technical transformation and vigorously improving economic benefits. After 1980s, new technologies such as hydraulic vibroflotation to reinforce sand dam and dam foundation, split grouting to reinforce homogeneous earth dam and high-pressure directional jet grouting to build cutoff wall on gravel foundation were tried. In the flood control dispatching system, microwave, short wave communication and computer are used; Some large-scale water control projects and hydropower stations adopt optimal operation combined with forecasting, and river basins and cascade hydropower stations with more projects begin to implement joint optimal operation; In the study of some reservoirs on sediment-laden rivers, the dispatching mode of "storing clear water and discharging muddy water" is adopted to reduce the siltation in the reservoir area and prolong the service life of the reservoir.