Yahekou Reservoir Reinforcement Project 1#,2# Spillway Hyarawlic Model Test

The actual water flow movement rules and water flow to the boundary function are complex, people still does not have very good mastery. Hydraulics many theoretical and computational stays in experience and simi-emperical stage, application as it has certain limitation. Experiment in hydraulics has basis and supporting function. Model experiments can be for theoretical and computational model of the provided the basis and the support, also can put forward the theoretical results of existing amendments or questioned, and to promote the deepening of the research in this field. So, usually in the design is completed, to verify the design results, so that early detection problems existing in the design, timely modified, so as to determine the safety, economy and rational engineering design. Conduct duck estuary reservoir base reinforcement engineering #1,#2 spillway hydraulic model test study, not only has the important practical significance, but also has theoretical academic value.The experimental research is about the 1#,2# spillway project of danger prevention and strengthening in Yahekou reservoir.The spillway's energy dissipater is plunge pool energy dissipation. This paper pay attention to the reseanable project layout form of lock chamber control segment and bend section, and the spillway's hydraulic parameters include flow velocity, flow states, pressure, surface line when the flood water encountered in 100 years.According to the problem that 1# spillway is inadequate capacity of outflow when the width of WES practical weir is prolonged, lots of research were given, and the reason is given too. Thus, the feasibility of combined flood discharge of 1#,2# spillway is verification through the analysis of experimental resultsThrough the reasearch about the different cross slope and straight slope arrangement form of 1# spillway's bend section's influence about flow discharge and safe operation, reasonable advision was given:the spillway's wing wall is treated accoording the water level and volecity.From the experiment we can see that the practical weir's capacity of outflow is closed to the broad crest weir's when the ratio of practical weir's widthδand the water level His more than 2.0.