Empirical relationships for the transport capacity of overland flow.

This paper reports the results of an experimental study on the transport capacity of overland flow. Experiments were carried out with five materials varying from silt to coarse sand, using a wide range of discharges and slopes, in a flume with a plane bed. The experiments provided the necessary data to establish highly correlated relationships between the sediment transport capacity of the flow and different hydraulic parameters, which are a necessary element of all physicallybased erosion models. Some important characteristics of these relationships are identified. These include the limited range of validity of individual relationships and the apparent lack of connection between initiation of sediment motion and sediment transport. Some relationships can also be applied to rough surfaces and to surfaces with a vegetation cover. It is believed that the proposed set of empirical relationships can be of use in the study of many aspects of soil erosion and deposition.

[1]  G. R. Foster,et al.  Estimating Sediment Transport Capacity in Watershed Modeling , 1981 .

[2]  R. Bagnold.  An approach to the sediment transport problem from general physics , 1966 .

[3]  A. Kalinske.  Criteria for determining sand‐transport by surface‐creep and saltation , 1942 .

[4]  S. Komura.  HYDRAULICS OF SLOPE EROSION BY OVERLAND FLOW , 1976 .

[5]  I. Moore,et al.  Sediment Transport Capacity of Sheet and Rill Flow: Application of Unit Stream Power Theory , 1986 .

[6]  Gerard Govers,et al.  Selectivity and transport capacity of thin flows in relation to rill erosion , 1985 .

[7]  D. A. Barry,et al.  A Mathematical Model of Soil Erosion and Deposition Processes: I. Theory for a Plane Land Element , 1983 .

[8]  E. J. Monke,et al.  Mechanics of Soil Erosion by Rainfall and Overland Flow , 1965 .

[9]  Neil L. Coleman,et al.  VELOCITY PROFILES WITH SUSPENDED SEDIMENT , 1981 .

[10]  R. Bagnold.  An empirical correlation of bedload transport rates in flumes and natural rivers , 1980, Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences.

[11]  Vito A. Vanoni,et al.  Resistance Properties of Sediment-Laden Streams , 1959 .

[12]  I. Moore,et al.  A Hydrology and Sedimentology Watershed Model. Part I: Operational Format and Hydrologic Component , 1984 .

[13]  Hans A. Einstein,et al.  River Channel Roughness , 1952 .

[14]  R. P. C. Morgan.  Field studies of sediment transport by overland flow , 1980 .

[15]  N. Dubin.  Mathematical Model , 2022 .

[16]  Billy J. Barfield,et al.  A Hydrology and Sedimentology Watershed Model. Part II: Sedimentology Component , 1984 .

[17]  Gerard Govers.  Initiation of motion in overland flow , 1987 .

[18]  Gerard Govers,et al.  Transporting capacity of overland flow on plane and on irregular beds , 1986 .

[19]  V. Singh,et al.  A hydrodynamic model of sediment transport in rill flows , 1982 .

[20]  C. Yang.  Incipient Motion and Sediment Transport , 1973 .

[21]  R. Bagnold.  Experiments on a gravity-free dispersion of large solid spheres in a Newtonian fluid under shear , 1954, Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences.

[22]  Neil L. Coleman,et al.  Simple model of sediment-laden flows , 1986 .

[23]  Thomas E. Croley,et al.  Unsteady overland sedimentation , 1982 .

[24]  J. Savat.  Resistance to flow in rough supercritical sheet flow , 1980 .

[25]  R. Rathbun,et al.  Measurement of hydraulic and sediment transport variables in a small recirculating flume , 1967 .

[26]  Peter Ackers,et al.  Sediment Transport: New Approach and Analysis , 1973 .

[27]  L. D. Meyer,et al.  Small Amounts of Surface Mulch Reduce Soil Erosion and Runoff Velocity , 1969 .

[28]  G. R. Foster,et al.  Transport of Soil Particles by Shallow Flow , 1972 .

[29]  M. Selim Yalin,et al.  An Expression for Bed-Load Transportation , 1963 .

[30]  S. W. Park,et al.  Soil Erosion Simulation on Small Watersheds: A Modified ANSWERS Model , 1982 .

[31]  T. Wu,et al.  A stochastic model of soil erosion , 1984 .

[32]  R. Bagnold.  Bed load transport by natural rivers , 1977 .

[33]  Chih Ted Yang,et al.  Unit Stream Power and Sediment Transport , 1972 .