It is the first volume of the 806 graduate entrance examination for hydraulic engineering major in Chongqing Jiaotong University. The hydraulic reference book is the first volume of hydraulics, which mainly introduces the basic concepts, velocity potential theory, potential flow and swirl flow, and the movement of incompressible fluid. The second volume of hydraulics discusses the advanced contents such as boundary layer flow, water wave, water flow stability and basic theory of hydraulic turbine.