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    • Journal of Range Management, Volume 51 (1998)
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    Influence of abiotic and biotic factors in measuring and modeling soil erosion on rangelands: State of knowledge

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    Author
    Weltz, M. A.
    Kidwell, M. R.
    Fox, H. D.
    Issue Date
    1998-09-01
    Keywords
    water erosion prediction project model
    terrain
    tillage
    rangeland soils
    data collection
    simulation models
    interrill erosion
    rill erosion
    topography
    soil erosion
    Universal Soil Loss Equation
    Revised Universal Soil Loss Equation
    rain
    slope
    rainfall simulators
    literature reviews
    canopy
    soil texture
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    Citation
    Weltz, M. A., Kidwell, M. R., & Fox, H. D. (1998). Influence of abiotic and biotic factors in measuring and modeling soil erosion on rangelands: State of knowledge. Journal of Range Management, 51(5), 482-495.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/643961
    DOI
    10.2307/4003363
    Additional Links
    https://rangelands.org/
    Abstract
    The first standardized soil erosion prediction equation used on rangelands was the Universal Soil Loss Eguation (USLE). The Revised Universal Soil Loss Equation (RUSLE) was developed to address deficiencies in the USLE by accounting for temporal changes in soil erodibility and plant factors which were not originally considered. Improvements were also made to the rainfall, length, slope, and management practice factors of the original USLE model. The Water Erosion Prediction Project (WEPP) model was developed to estimate soil erosion from single events, long-term soil loss from hillslopes, and sediment yield from small watersheds. Temporal changes in biomass, soil erodibility, and land management practices, and to a limited extent, spatial distribution of soil, vegetation, and land use are addressed in the WEPP model. To apply new process-based erosion prediction technology, basic research must be conducted to better model the interactions and feedback mechanisms of plant communities and landscape ecology. Thresholds at which accelerated soil erosion results in unstable plant communities must be identified. Research is needed to determine the confidence limits for erosion predictions generated by simulation models so that the probability of meeting specified soil loss values (kg ha-1 yr-1) for given management systems can be calculated at specific significance levels. As the technology for modeling soil erosion on rangelands has improved, limitations with the techniques of parameter estimation have been encountered. Improvements in model parameterization techniques and national databases that incorporate vegetation and soil variability are required before existing erosion prediction models can be implemented.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4003363
    Scopus Count
    Collections
    Journal of Range Management, Volume 51, Number 5 (September 1998)

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