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Rapid Estimation of Soil Erosion Rate from Exhumed Roots (Xiaolong Mts, China)

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  • Miklós Kázmér

    (Department of Palaeontology, Eötvös University, Pázmány Sétány 1/c, H-1117 Budapest, Hungary)

  • Keyan Fang

    (Key Laboratory of Humid Subtropical Eco-Geographical Process (Ministry of Education), College of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China)

  • Yunchao Zhou

    (Department of Soil and Water Conservation, Forest College, Guizhou University, Huaxi, Guiyang 550025, China)

  • Zoltán Kern

    (Institute for Geological and Geochemical Research, HUN-REN Research Centre for Astronomy and Earth Sciences, Budaörsi út 45, H-1112 Budapest, Hungary
    CSFK, MTA Centre of Excellence, Konkoly Thege Miklós út 15-17, H-1121 Budapest, Hungary)

Abstract

Soil erosion is a challenge worldwide, including in China. The dendrogeomorphic method was applied, for the first time, at Xiaolong Mts in Gansu Province to obtain a quantitative estimate of the soil erosion rate. The dataset built in this pilot study allowed the identification of exhumation texture in exposed roots between 1967 and 2002. The calculated mean erosion rate estimates (Er a ) ranged from 2.6 to 16.5 mm yr −1 and showed an increase with the slope steepness (s). The best fitting linear model (Er a = 0.043(±0.017) × s + 3.09(±1.04); R² = 0.20; R² adj = 0.16; F = 6.18; p = 0.02) could be used in future research to determine and to map soil denudation in this part of the Xiaolong Mts. Notable associations were found between erosive rainfalls and root exhumation events. Daily (Rx1day) and 5-day (Rx5day) precipitation totals of 56 and 73 mm, respectively, seem to be critical thresholds which if exceeded will always induce root exhumation in the same year or in the consecutive season in the forest of the Xiaolong Mts in the studied period.

Suggested Citation

  • Miklós Kázmér & Keyan Fang & Yunchao Zhou & Zoltán Kern, 2024. "Rapid Estimation of Soil Erosion Rate from Exhumed Roots (Xiaolong Mts, China)," Land, MDPI, vol. 13(6), pages 1-14, May.
    • Handle: RePEc:gam:jlands:v:13:y:2024:i:6:p:771-:d:1404926
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    References listed on IDEAS

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    1. Saskia Keesstra & Gerben Mol & Jan De Leeuw & Joop Okx & Co Molenaar & Margot De Cleen & Saskia Visser, 2018. "Soil-Related Sustainable Development Goals: Four Concepts to Make Land Degradation Neutrality and Restoration Work," Land, MDPI, vol. 7(4), pages 1-20, November.
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