A new splash and sheet erosion equation for rangelands

H. Wei, M. A. Nearing, J. J. Stone, Phillip Guertin, K. E. Spaeth, F. B. Pierson, M. H. Nichols, C. A. Moffett

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

Soil loss rates predicted from erosion models for rangelands have the potential to be important quantitative indicators for rangeland health and for assessing conservation practices. Splash and sheet erosion processes on rangelands differ from croplands, where the process is conceptualized in part as interrill erosion. Previous interrill equations were developed from cropland soils where interrill erosion was conceptualized and modeled for small plots, which are not generally large enough to encompass the relative high spatial heterogeneity of rangelands. Also, interrill erosion is usually modeled as a function of rainfall intensity (I) and runoff rate (q) such that I and a̧ are independent of each other. Splash and sheet erosion is the dominant type of erosion on most undisturbed rangeland hillslopes where there is adequate vegetation, and these important erosion processes need to be addressed to develop an appropriate rangeland erosion model. In this study, we developed a new equation for calculating the combined rate of splash and sheet erosion (D ss) using a large set of rainfall simulation data from the western United States. The equation we propose: D ss= K ssI 1.052 q 0. 592where K is a splash and sheet erosion coefficient, takes into account a key interrelationship betweenIand q revealed in the data. This equation was successfully evaluated using independent sets of multiple-intensity experimental data. The new equation should enable improved estimation of water erosion on rangelands in the western United States and in other parts of the world.

Original languageEnglish (US)
Pages (from-to)1386-1392
Number of pages7
JournalSoil Science Society of America Journal
Volume73
Issue number4
DOIs
StatePublished - Jul 2009
Externally publishedYes

Fingerprint

splash erosion
sheet erosion
rangeland
rangelands
interrill erosion
erosion
soil erosion models
Western United States
water erosion
conservation practices
rain intensity
rainfall simulation
precipitation intensity
hillslope
soil erosion
soil
runoff
rainfall
vegetation

ASJC Scopus subject areas

  • Soil Science

Cite this

Wei, H., Nearing, M. A., Stone, J. J., Guertin, P., Spaeth, K. E., Pierson, F. B., ... Moffett, C. A. (2009). A new splash and sheet erosion equation for rangelands. Soil Science Society of America Journal, 73(4), 1386-1392. https://doi.org/10.2136/sssaj2008.0061

A new splash and sheet erosion equation for rangelands. / Wei, H.; Nearing, M. A.; Stone, J. J.; Guertin, Phillip; Spaeth, K. E.; Pierson, F. B.; Nichols, M. H.; Moffett, C. A.

In: Soil Science Society of America Journal, Vol. 73, No. 4, 07.2009, p. 1386-1392.

Research output: Contribution to journalArticle

Wei, H, Nearing, MA, Stone, JJ, Guertin, P, Spaeth, KE, Pierson, FB, Nichols, MH & Moffett, CA 2009, 'A new splash and sheet erosion equation for rangelands', Soil Science Society of America Journal, vol. 73, no. 4, pp. 1386-1392. https://doi.org/10.2136/sssaj2008.0061
Wei, H. ; Nearing, M. A. ; Stone, J. J. ; Guertin, Phillip ; Spaeth, K. E. ; Pierson, F. B. ; Nichols, M. H. ; Moffett, C. A. / A new splash and sheet erosion equation for rangelands. In: Soil Science Society of America Journal. 2009 ; Vol. 73, No. 4. pp. 1386-1392.
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