TY - JOUR
T1 - SEDIMENT INERTIA AS CAUSE OF RIVER ANTIDUNES
AU - Parker, Gary
PY - 1975
Y1 - 1975
N2 - The formation of antidunes on riverbeds is explained in terms of sediment inertial effects. Due to inertia, bed sediment in transport cannot respond immediately to flow changes. To quantify the effect, a simple equation for sediment momentum balance is derived. A stability analysis indicates that riverbeds are unstable for a specific range of Froude numbers and that the instability leads exclusively to antidune formation. The instability, which is scaled by a dimensionless number representing the ratio of sediment inertia to friction, is a result of a spatial lag of bed load behind bed stress. An analytical relation for spatial lag is obtained, and the lag is estimated for some experimental data. The limits of antidune formation are compared with data.
AB - The formation of antidunes on riverbeds is explained in terms of sediment inertial effects. Due to inertia, bed sediment in transport cannot respond immediately to flow changes. To quantify the effect, a simple equation for sediment momentum balance is derived. A stability analysis indicates that riverbeds are unstable for a specific range of Froude numbers and that the instability leads exclusively to antidune formation. The instability, which is scaled by a dimensionless number representing the ratio of sediment inertia to friction, is a result of a spatial lag of bed load behind bed stress. An analytical relation for spatial lag is obtained, and the lag is estimated for some experimental data. The limits of antidune formation are compared with data.
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M3 - Article
AN - SCOPUS:0016472298
VL - 101
SP - 211
EP - 221
JO - American Society of Civil Engineers, Journal of the Hydraulics Division
JF - American Society of Civil Engineers, Journal of the Hydraulics Division
SN - 0733-9429
IS - 2
ER -