Length-slope factors for the Revised Universal Soil Loss Equation: simplified method of estimation

ABSTRACT: The combined length-slope (LS) factor in the Universal Soil Loss Equation (USLE) is u measure of the sediment transport capacity of9 overland flow. A dimensionless sediment transport capacity index that is a non-linear function of specific discharge and slope was derived by considering the transport capacity limiting sediment flux in the Hairsine-Rose, WPP, and catchment evolution erosion theories. For a two-dimensional hillslope, the index is equivalent to the combined LS factors in the Revised Universal Soil Loss Equation (RUSLE), but it is simpler to use arid conceptually easier to understand. A major advantage of the index is that it can be easily extended to three dimensional terrain.

[1]  G. R. Foster,et al.  Estimating erosion and sediment yield on field-sized areas , 1981 .

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

[3]  Calvin Wyatt Rose,et al.  Developments in Soil Erosion and Deposition Models , 1985 .

[4]  Pierre Y. Julien,et al.  Sediment Transport Capacity of Overland Flow , 1985 .

[5]  John P. Wilson,et al.  Estimating the topographic factor in the universal soil loss equation for watersheds , 1986 .

[6]  I. Moore,et al.  Physical basis of the length-slope factor in the universal soil loss equation , 1986 .

[7]  B. Rhoads.  Stream power terminology , 1987 .

[8]  C. K. Mutchler,et al.  Revised Slope Length Factor for the Universal Soil Loss Equation , 1989 .

[9]  G. R. Foster,et al.  RUSLE: Revised universal soil loss equation , 1991 .

[10]  I. Rodríguez‐Iturbe,et al.  A coupled channel network growth and hillslope evolution model: 2. Nondimensionalization and applications , 1991 .

[11]  G. R. Foster,et al.  WEPP: A new generation of erosion prediction technology , 1991 .

[12]  William J. Elliot,et al.  WEPP: soil erodibility experiments for rangeland and cropland soils , 1991 .

[13]  Peter B. Hairsine,et al.  Rainfall Detachment and Deposition: Sediment Transport in the Absence of Flow-Driven Processes , 1991 .

[14]  Peter B. Hairsine,et al.  Modeling water erosion due to overland flow using physical principles: 1. Sheet flow , 1992 .