Abstract
Purpose
Hilly areas are highly susceptible to soil erosion. This study aims to discover the drivers of soil erosion, identify soil erosion–sensitive areas, and predict future soil erosion in typical hilly areas of Hubei Province, China, using combined RUSLE and LSTM models.
Materials and methods
In this study, soil erosion in hilly areas of Hubei Province from 2000 to 2020 was quantitatively analyzed using the revised universal soil loss equation (RUSLE), and the soil erosion sensitivity evaluation system was constructed, a geographic detector was employed to identify the main drivers of soil erosion sensitivity, and using the long short-term memory neural network model (LSTM) to predict soil erosion in 2025.
Results and discussions
The results showed that most areas were dominated by slight and moderate erosion. Slope and vegetation coverage were identified as the core elements influencing the space heterogeneity of soil erosion. Soil erosion sensitivity was mainly composed of moderate sensitivity, accounting for more than 70% of the total area. The strong and extreme sensitivity demonstrated a downward trend with the continued implementation of slope management and forest rehabilitation from slope agriculture, whereas the sensitivity was still higher in the northwest and southwest Hubei Province. Regions with severe soil erosion had high sensitivity, and the spatial distribution of the two is strongly coherent. Areas with surface relief > 300 m and vegetation cover < 30% had the highest sensitivity and should be highly valued. The percentage of moderate and higher soil erosion area in 2025 was 3.77% lower than in 2020, but severe erosion still exists in the northwest and southwest Hubei Province.
Conclusions
Soil erosion sensitivity in the western part of the study area was the highest, followed by the southeast, and the overall erosion sensitivity was gradually decreasing during the studied period. In the future, soil erosion intensity will show a downward trend, whereas the deployment of soil and water conservation measures in soil erosion–sensitive areas should still be strengthened. The results are helpful for accurate soil erosion control and prediction in the hilly areas of Hubei Province, China.
Graphical Abstract
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Data availability
The data that support the findings of this study are available on request from the corresponding author.
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Funding
This research was jointly supported by the National Natural Science Foundation of China (42377354), the regional innovation and development of NSFC (U21A2039), and the Chunhui Plan Cooperation Research Project of the Chinese Ministry of Education (202200199).
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Conceptualization: PT; methodology: PT and YP; validation: PT, YG, and LL; formal analysis: YP; investigation: PT and YP; resources: PT; data curation: PT, YP, and ZZ; writing—original draft: PT and YP; writing—review & editing: LL, YG, YG, ZZ, YC, and LC; visualization: PT and YP; supervision: PT and LL; project administration: PT and LL; funding acquisition: PT and LL.
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Highlights
• Weights of soil erosion sensitivity factors are determined by a geographic detector.
• Slope and vegetation cover are core elements influencing soil erosion sensitivity.
• Areas with relief > 300 m and vegetation cover < 30% had the highest sensitivity.
• LSTM prediction showed that severe erosion exists in northwest and southwest Hubei.
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Ping, Y., Tian, P., Luo, L. et al. Soil erosion sensitivity and prediction for hilly areas of Hubei Province, China, using combined RUSLE and LSTM models. J Soils Sediments 24, 829–846 (2024). https://doi.org/10.1007/s11368-023-03668-8
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DOI: https://doi.org/10.1007/s11368-023-03668-8