水利工程基础知识,水利工程基本概念（Basic knowledge of water conservancy projects and basic concepts of water conservancy projects）.docVIP

水利工程基础知识,水利工程基本概念（Basic knowledge of water conservancy projects and basic concepts of water conservancy projects） Water conservancy project: refers to control, regulate and utilize the nature of surface water and underground water, in order to achieve the purpose of one of various engineering and construction. Water conservancy project can be divided into flood control project, irrigation and water conservancy project (irrigation project), hydropower project, shipping and city water supply and drainage project according to its service object. Hydro junction: in order to develop and utilize water resources and prevent water disasters, several kinds of hydraulic structures are built together. They play their respective roles and work in concert with each other. The complex of hydraulic structures which work in each municipality directly under the central government is called the water control project. Grade of water conservancy and hydropower project: grade of water conservancy and hydropower and classification of buildings. In the planning and design of water conservancy and hydropower and hydraulic structures, in order to make the project safe, economic and reasonable, according to the influence of project scale, benefit and role in the national economy and after the crash, the project is divided into several grades. Apron and apron: fire pool bottom gate, downstream of the dam, known as the apron. It is used to protect river bed from scour in the range of hydraulic jump. General use of concrete or masonry made oar, apron height and size depends on the hydraulic characteristics of the roller apron hydraulic jump. Then the apron or stilling pool behind the energy dissipation measures, known as the apron. Its role is to further disinfection residual kinetic energy of water flow, river bed protection from harm of water erosion. Dam: a water retaining structure for intercepting water flow. A reservoir is formed upstream of the dam to regulate the flow and raise the wate