### Abstract

The USLE-MM is a rainfall erosion model which predicts soil loss using an erosivity index which is given by the Q_{R}EI_{30} index to a power > 1.0. In the USLE modelling environment, soil erodibility is defined as the soil loss per unit quantity of the erosivity index. With the USLE-MM model where event soil loss = K_{UMM} (Q_{R}EI_{30})^{b1}, using K_{UMM} as the erodibility factor does not conform with the requirement that the erodibility factor has units that are consistent between soils and locations. The alternative is to use the model event soil loss = K_{UM} a1 (Q_{R}EI_{30})^{b1} where K_{UM} is determined from dividing the total amount of soil loss from a large number of events by the total value of Q_{R}EI_{30} associated with those events because this model isolates the soil erodibility effect from the effect of b1 on K_{UMM}. The effect of b1 on a1 is demonstrated in this paper for bare fallow plots at 15 locations in the USA and plots at Sparacia, Sicily.

Original language | English |
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Pages (from-to) | 424-426 |

Number of pages | 3 |

Journal | Catena |

Volume | 163 |

DOIs | |

Publication status | Published - 1 Apr 2018 |

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### Cite this

*Catena*,

*163*, 424-426. https://doi.org/10.1016/j.catena.2018.01.008

}

*Catena*, vol. 163, pp. 424-426. https://doi.org/10.1016/j.catena.2018.01.008

**Determining soil erodibilities for the USLE-MM rainfall erosion model.** / Kinnell, P. I.A.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Determining soil erodibilities for the USLE-MM rainfall erosion model

AU - Kinnell, P. I.A.

PY - 2018/4/1

Y1 - 2018/4/1

N2 - The USLE-MM is a rainfall erosion model which predicts soil loss using an erosivity index which is given by the QREI30 index to a power > 1.0. In the USLE modelling environment, soil erodibility is defined as the soil loss per unit quantity of the erosivity index. With the USLE-MM model where event soil loss = KUMM (QREI30)b1, using KUMM as the erodibility factor does not conform with the requirement that the erodibility factor has units that are consistent between soils and locations. The alternative is to use the model event soil loss = KUM a1 (QREI30)b1 where KUM is determined from dividing the total amount of soil loss from a large number of events by the total value of QREI30 associated with those events because this model isolates the soil erodibility effect from the effect of b1 on KUMM. The effect of b1 on a1 is demonstrated in this paper for bare fallow plots at 15 locations in the USA and plots at Sparacia, Sicily.

AB - The USLE-MM is a rainfall erosion model which predicts soil loss using an erosivity index which is given by the QREI30 index to a power > 1.0. In the USLE modelling environment, soil erodibility is defined as the soil loss per unit quantity of the erosivity index. With the USLE-MM model where event soil loss = KUMM (QREI30)b1, using KUMM as the erodibility factor does not conform with the requirement that the erodibility factor has units that are consistent between soils and locations. The alternative is to use the model event soil loss = KUM a1 (QREI30)b1 where KUM is determined from dividing the total amount of soil loss from a large number of events by the total value of QREI30 associated with those events because this model isolates the soil erodibility effect from the effect of b1 on KUMM. The effect of b1 on a1 is demonstrated in this paper for bare fallow plots at 15 locations in the USA and plots at Sparacia, Sicily.

KW - Erosion plots

KW - Soil loss prediction

UR - http://www.scopus.com/inward/record.url?scp=85042282646&partnerID=8YFLogxK

UR - http://www.mendeley.com/research/determining-soil-erodibilities-uslemm-rainfall-erosion-model

U2 - 10.1016/j.catena.2018.01.008

DO - 10.1016/j.catena.2018.01.008

M3 - Article

VL - 163

SP - 424

EP - 426

JO - Catena

JF - Catena

SN - 0341-8162

ER -