ABSTRACT
ABSTRACT: The flow condition at the immediately downstream of hydraulic structures such as dams, weirs, and drop structures is apt to become transition from supercritical to subcritical flows. In the transition flow, various types of flow conditions are formed in accordance with inflow Froude number, boundary-layer development at inflow section, aspect ratio, relative downstream depth, channel geometry, Reynolds number, air concentration at inflow section, and etc. Systematical clarification of the transition flows is the most significant for effective hydraulic design of hydraulic structures. In this section, various types of flow conditions have been presented on the basis of systematical experiments in hydraulic laboratory.
