Capacity of channels with floodplains (compound channels)

Abstract

Substantiated dependences for estimating the capacity of channels with floodplains and leveed channels are needed for engineering solution of problems related to flood control.For a long time in hydraulics the movement of flows in the channel and floodplain parts of channels with floodplains was regarded as independent, i.e., overflow onto the floodplain does not affect movement of the channel flow. In connection with this the formal division of the entire channel by vertical planes into parts was considered sufficient when calculating the discharge of water in compound channels. The traditional equation of motion was used, and the total discharge was calculated by summation, i.e.,