Author(s): Haoke Cheng; Yang Xiao; Hongwu Tang; Weiwei Yu
Linked Author(s): Hongwu Tang, Yang Xiao
Keywords: Hydrodynamic condition; Phosphorus; Sediment
Abstract: The distribution and movement of soluble reactive phosphorus (SRP) between overlying water and bed-sediment in river systems is strongly influenced by hydrodynamic conditions. This research reports on an investigation into the effects of velocity on phosphorus distribution between overlying water and bed-sediment. The experiments were conducted in an annular flume for 4 days. The sediment was placed in the bottom of the channel, the range of water velocity was controlled below the sediment incipient velocity (i. e. ,< 11 cm/s) to keep the suspended sediment concentration low. The experimental results demonstrated that the transport of phosphorus to bed-sediment in fluvial systems was far from a steady-state equilibrium at the end of experiments. In the first 24 h, the content of P uptake by bed-sediment increased with increasing water velocity in the first 24h, and in the following 3d, water velocity appeared to have no significant effect on P uptake by bed-sediment.
Year: 2015