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Characteristics of Soil Erodibility K Value and Its Influencing Factors in the Changyan Watershed, Southwest Hubei, China

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  • Xiaofang Huang

    (Department of Ecology, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China)

  • Lirong Lin

    (Department of Soil and Plant Nutrition, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
    Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Wuhan 430070, China
    State Environmental Protection Key Laboratory of Soil Health and Green Remediation, Wuhan 430070, China)

  • Shuwen Ding

    (Department of Ecology, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
    Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Wuhan 430070, China
    State Environmental Protection Key Laboratory of Soil Health and Green Remediation, Wuhan 430070, China)

  • Zhengchao Tian

    (Department of Soil and Plant Nutrition, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
    Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Wuhan 430070, China
    State Environmental Protection Key Laboratory of Soil Health and Green Remediation, Wuhan 430070, China)

  • Xinyuan Zhu

    (Department of Ecology, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China)

  • Keren Wu

    (Department of Resource and Environmental Information Engineering, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China)

  • Yuanzhe Zhao

    (Department of Soil and Plant Nutrition, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China)

Abstract

Soil erodibility K factor is an important parameter for evaluating soil erosion vulnerability and is required for soil erosion prediction models. It is also necessary for soil and water conservation management. In this study, we investigated the spatial variability characteristics of soil erodibility K factor in a watershed (Changyan watershed with an area of 8.59 km 2 ) of Enshi, southwest of Hubei, China, and evaluated its influencing factors. The soil K values were determined by the EPIC model using the soil survey data across the watershed. Spatial K value prediction was conducted by regression-kriging using geographic data. We also assessed the effects of soil type, land use, and topography on the K value variations. The results showed that soil erodibility K values varied between 0.039–0.052 t·hm 2 ·h/(hm 2 ·MJ·mm) in the watershed with a block-like structure of spatial distribution. The soil erodibility, soil texture, and organic matter content all showed positive spatial autocorrelation. The spatial variability of the K value was related to soil type, land use, and topography. The calcareous soil had the greatest K value on average, followed by the paddy soil, the yellow-brown soil (an alfisol), the purple soil (an inceptisol), and the fluvo-aquic soil (an entisol). The soil K factor showed a negative correlation with the sand content but was positively related to soil silt and clay contents. Forest soils had a greater ability to resist to erosion compared to the cultivated soils. The soil K values increased with increasing slope and showed a decreasing trend with increasing altitude.

Suggested Citation

  • Xiaofang Huang & Lirong Lin & Shuwen Ding & Zhengchao Tian & Xinyuan Zhu & Keren Wu & Yuanzhe Zhao, 2022. "Characteristics of Soil Erodibility K Value and Its Influencing Factors in the Changyan Watershed, Southwest Hubei, China," Land, MDPI, vol. 11(1), pages 1-14, January.
    • Handle: RePEc:gam:jlands:v:11:y:2022:i:1:p:134-:d:725398
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    References listed on IDEAS

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    1. Raquel Mendonça & Roger A. Müller & David Clow & Charles Verpoorter & Peter Raymond & Lars J. Tranvik & Sebastian Sobek, 2017. "Organic carbon burial in global lakes and reservoirs," Nature Communications, Nature, vol. 8(1), pages 1-7, December.
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    Cited by:

    1. Shijie Song & Beibei Zheng & Tao Sun & Lin Du & Jiangbo Wei, 2023. "Influence of Different Mining Damage Types on Soil Erodibility in Coal Mining Areas of Northern Shaanxi in the Middle Reaches of the Yellow River in China," Sustainability, MDPI, vol. 15(6), pages 1-22, March.
    2. Mingjie Qian & Wenxiang Zhou & Shufei Wang & Yuting Li & Yingui Cao, 2022. "The Influence of Soil Erodibility and Saturated Hydraulic Conductivity on Soil Nutrients in the Pingshuo Opencast Coalmine, China," IJERPH, MDPI, vol. 19(8), pages 1-17, April.
    3. Yuanli Zhu & Wenbo Li & Dongyan Wang & Zihao Wu & Peng Shang, 2022. "Spatial Pattern of Soil Erosion in Relation to Land Use Change in a Rolling Hilly Region of Northeast China," Land, MDPI, vol. 11(8), pages 1-17, August.

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