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Assessment of Soil Erosion from an Ungauged Small Watershed and Its Effect on Lake Ulansuhai, China

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  • Zhuangzhuang Zhang

    (Inner Mongolia Key Laboratory of River and Lake Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China)

  • Ruihong Yu

    (Inner Mongolia Key Laboratory of River and Lake Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
    Key Laboratory of Ecology and Resources Use of the Mongolian Plateau of Ministry of Education, Hohhot 010021, China
    Autonomous Region Collaborative Innovation Center for Integrated Management of Water Resources and Water Environment in the Inner Mongolia Reaches of the Yellow River, Hohhot 010018, China)

Abstract

Lake Ulansuhai, one of the main water sources for semi-arid areas of China, has a local deposit caused by soil erosion during past decades. However, a lack of monitor stations prevents better estimation of soil erosion levels. Therefore, we try to estimate soil erosion in the Huangtuyaozi (HTYZ) watershed, an ungauged small watershed of the lake’s eastern watershed, by using the revised universal soil loss equation (RUSLE) model and multi-source remote sensing data, and analyze its key drivers and effect on the lake siltation. The result showed that the soil erosion rate in the HTYZ watershed ranged from 0 to 129.893 t ha −1 yr −1 with an average of 6.45 t ha −1 yr −1 during 1986–2015. In particular, 80.06% of the area was less than 10 t ha −1 yr −1 , and just 0.06% was over 50 t ha −1 yr −1 , mainly in the mountain area, the southern part of the HTYZ watershed. Moreover, rainfall erosivity factor is the key factor, and rainfall during flood season plays a key role in soil erosion. Due to the soil erosion of HTYZ, siltation in Lake Ulansuhai reached 223.83 ha, with the annual siltation area increasing at a rate of 7.46 ha/yr. The results could provide a reference for estimating soil erosion of ungauged small watershed in semi-arid areas.

Suggested Citation

  • Zhuangzhuang Zhang & Ruihong Yu, 2023. "Assessment of Soil Erosion from an Ungauged Small Watershed and Its Effect on Lake Ulansuhai, China," Land, MDPI, vol. 12(2), pages 1-15, February.
    • Handle: RePEc:gam:jlands:v:12:y:2023:i:2:p:440-:d:1061940
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    References listed on IDEAS

    as
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    2. Dawit Samuel Teshome & Mitiku Badasa Moisa & Dessalegn Obsi Gemeda & Songcai You, 2022. "Effect of Land Use-Land Cover Change on Soil Erosion and Sediment Yield in Muger Sub-Basin, Upper Blue Nile Basin, Ethiopia," Land, MDPI, vol. 11(12), pages 1-20, November.
    3. Bhatti, Muhammad Tousif & Ashraf, M. & Anwar, Arif A., 2021. "Soil erosion and sediment load management strategies for sustainable irrigation in arid regions," Papers published in Journals (Open Access), International Water Management Institute, pages 1-13(6):354.
    4. 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.
    5. Muhammad Tousif Bhatti & Muhammad Ashraf & Arif A. Anwar, 2021. "Soil Erosion and Sediment Load Management Strategies for Sustainable Irrigation in Arid Regions," Sustainability, MDPI, vol. 13(6), pages 1-22, March.
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