Articles | Volume 9, issue 1
https://doi.org/10.5194/soil-9-71-2023
https://doi.org/10.5194/soil-9-71-2023
Original research article
 | 
23 Jan 2023
Original research article |  | 23 Jan 2023

Does soil thinning change soil erodibility? An exploration of long-term erosion feedback systems

Pedro V. G. Batista, Daniel L. Evans, Bernardo M. Cândido, and Peter Fiener

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Cited articles

Anache, J. A. A., Flanagan, D. C., Srivastava, A., and Wendland, E. C.: Land use and climate change impacts on runoff and soil erosion at the hillslope scale in the Brazilian Cerrado, Sci. Total Environ., 622, 140–151, https://doi.org/10.1016/j.scitotenv.2017.11.257, 2018. 
Anselmetti, F. S., Hodell, D. A., Ariztequi, D., Brenner, M., and Rosenmeier, M. F.: Quantification of soil erosion rates related to ancient Maya deforestation, Geology, 35, 915–918, https://doi.org/10.1130/G23834A.1, 2007. 
Auerswald, K., Fiener, P., Martin, W., and Elhaus, D.: Use and misuse of the K factor equation in soil erosion modeling: An alternative equation for determining USLE nomograph soil erodibility values, Catena, 118, 220–225, https://doi.org/10.1016/j.catena.2014.01.008, 2014. 
Batista, P. V. G., Evans, D. L., Cândido, B. M., and Fiener, P.: Erosion Feedback System – Soil Thinning MMMF Model (2.0), Zenodo [code], https://doi.org/10.5281/zenodo.7326882, 2022. 
Benaud, P., Anderson, K., Evans, M., Farrow, L., Glendell, M., James, M., Quine, T., Quinton, J., Rawlins, B., Rickson, J., and Brazier, R.: National-scale geodata describe widespread accelerated soil erosion., Geoderma, 371, 114378, https://doi.org/10.1016/j.geoderma.2020.114378, 2020. 
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Short summary
Most agricultural soils erode faster than new soil is formed, which leads to soil thinning. Here, we used a model simulation to investigate how soil erosion and soil thinning can alter topsoil properties and change its susceptibility to erosion. We found that soil profiles are sensitive to erosion-induced changes in the soil system, which mostly slow down soil thinning. These findings are likely to impact how we estimate soil lifespans and simulate long-term erosion dynamics.