Comprehensive analysis of sediment grain features and their engineering implications in the Yangtze River source area DOI Creative Commons
Zhijing Li, Xiaoxue Wang, Yujiao Liu

и другие.

Frontiers in Soil Science, Год журнала: 2025, Номер 5

Опубликована: Фев. 25, 2025

Introduction The particle size characteristics of irregular sediments in the Yangtze River Source Area (YRSA) are pivotal for understanding mechanical properties sedimentary medium. Methods This study utilizes field sediment sampling, laser scanning, laboratory testing, and mathematical statistics to analyze morphological, geometric, mineralogical, accumulation particles region. Results Our findings indicate that YRSA have angular edges deviate from spherical shapes, exhibiting elongated flatter three-dimensional morphologies. In experiment, sliding plate method was used measure angle repose sediments, which found be 36.7° above water 35.9° below water. Both values higher than typical range non-plateau regions, indicating reduced mobility. composed fine-grained coarse-grained soils. distribution is primarily coarse sand (0.5-2.0 mm), fine gravel (2.0-5.0 medium (5.0-20.0 with a significant coarsening trend observed over past six years. mineral composition, dominated by quartz, feldspar, heavy minerals, stable, approximately 70% minerals having hardness ≥ 7 on Mohs scale. most abundant trace elements Ti, Mn, Ba, P, Sr, Zr, Cl. Discussion research reveals markedly different those natural sands necessitating reevaluation conventional theories engineering practices constructions this area. insights profound practically relevant, illuminating transport dynamics alpine river systems supporting sustainable regional development.

Язык: Английский

Comprehensive analysis of sediment grain features and their engineering implications in the Yangtze River source area DOI Creative Commons
Zhijing Li, Xiaoxue Wang, Yujiao Liu

и другие.

Frontiers in Soil Science, Год журнала: 2025, Номер 5

Опубликована: Фев. 25, 2025

Introduction The particle size characteristics of irregular sediments in the Yangtze River Source Area (YRSA) are pivotal for understanding mechanical properties sedimentary medium. Methods This study utilizes field sediment sampling, laser scanning, laboratory testing, and mathematical statistics to analyze morphological, geometric, mineralogical, accumulation particles region. Results Our findings indicate that YRSA have angular edges deviate from spherical shapes, exhibiting elongated flatter three-dimensional morphologies. In experiment, sliding plate method was used measure angle repose sediments, which found be 36.7° above water 35.9° below water. Both values higher than typical range non-plateau regions, indicating reduced mobility. composed fine-grained coarse-grained soils. distribution is primarily coarse sand (0.5-2.0 mm), fine gravel (2.0-5.0 medium (5.0-20.0 with a significant coarsening trend observed over past six years. mineral composition, dominated by quartz, feldspar, heavy minerals, stable, approximately 70% minerals having hardness ≥ 7 on Mohs scale. most abundant trace elements Ti, Mn, Ba, P, Sr, Zr, Cl. Discussion research reveals markedly different those natural sands necessitating reevaluation conventional theories engineering practices constructions this area. insights profound practically relevant, illuminating transport dynamics alpine river systems supporting sustainable regional development.

Язык: Английский

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