Author(s): Iehisa Nezu; Hiroji Nakagawa; Takashi Abe
Linked Author(s): Iehisa Nezu, Hiroji Nakagawa
Keywords: No Keywords
Abstract: Many investigations on flow resistance and the associated water-depth vs. Discharge curves, i. E., H- curves, in compound open-channel flows have been conducted intensively for practical purposes of flood control planning. The compound flow section is divided into the two: the main channel and the flood plains. The resulting discharge calculated by 1-D hydraulic methods is, however, overestimated because a strong interaction between the high-speed main-channel flow and the low-speed flood-plain flow is ignored. This flow interaction transports longitudinal momentum from the main channel to the flood plain regions, and thus it promotes an energy loss and a substantial decrease of total discharge capacity in compound channels.
Year: 1995