Grassed Waterways Reduce Soil Erosion in Rare Earth Tailings Through Runoff Moderation and Sediment Particle Sorting
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Le résumé fourni par la source
ABSTRACT Ganzhou City in Jiangxi Province, China, serves as a critical source and supplier of rare earth ions. However, rampant mining activities have resulted in severe soil erosion, persistent pollution, and serious land degradation. Grassed waterways offer substantial benefits in drainage, erosion resistance, and promoting sediment deposition. This study investigated the application of the waterways for soil conservation in rare earth tailings, focusing on how flow rate and slope gradient dynamically influence runoff processes, sediment transport, and particle sorting during multiple scouring events. The results showed that grassed waterways effectively reduced runoff rates and significantly controlled sediment yield. Both flow rate and slope considerably affected sediment yield, with slope exerting a more pronounced influence. Particle size distribution in waterways typically exhibited bimodal patterns under varying conditions, with dominant particles size of the 0–0.068 and 0.094–0.171 mm. Transport mechanisms, primarily suspension/saltation (> 50%) and rolling, controlled these particle sizes, respectively, while coarse particles (> 0.955 mm) were predominantly deposited. Grassed waterways enhanced particle separation by minimizing the loss of large particles, including both agglomerates and individual grains, thereby reducing overall sediment generation. This study provided valuable insights into the potential of waterways in mitigating runoff and sediment generation and optimizing deposition processes, offering practical implications for engineering applications.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Grassed Waterways Reduce Soil Erosion in Rare Earth Tailings Through Runoff Moderation and Sediment Particle Sorting
- Date Crossref
- 10/09/2025
- Éditeur
- Wiley
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Jiangxi Agricultural University Key Laboratory of Poyang Lake Basin Agricultural Resources and Ecology of Jiangxi Province pays non établi dans la noticeUniversité ou école supérieure
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Jiangxi Academy of Environmental Sciences pays non établi dans la noticeStructure de recherche
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School of Soil and Water Conservation Jiangxi University of Water Resources and Electric Power Nanchang Jiangxi China pays non établi dans la noticeUniversité ou école supérieure
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College of Land Resources and Environment Key Laboratory of Poyang Lake Basin Agricultural Resources and Ecology of Jiangxi Province pays non établi dans la noticeUniversité ou école supérieure
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Jiangxi Academy of Water Science and Engineering Nanchang Jiangxi China pays non établi dans la noticeInstitution
Key Laboratory of Poyang Lake Basin Agricultural Resources and Ecology of Jiangxi Province — Jiangxi Agricultural University, Jiangxi Academy of Environmental Sciences et School of Soil and Water Conservation Jiangxi University of Water Resources and Electric Power Nanchang Jiangxi China, avec 2 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.