泥沙研究2025，Vol.50Issue(4)：23-29,7.DOI:10.16239/j.cnki.0468-155x.2025.04.004
小流域地理特征及土地利用对流域输沙粒径的影响
Impact of geographical features and land use in small watersheds on the sediment particle size distribution
摘要
Abstract
The distribution of soil particle size is one of the important soil physical properties,which affects the hydraulic characteristics and soil erosion.Taking the Caijiachuan nested watershed in the loess hilly and gully region as the research object,this study explores the effects of watershed area,forest coverage,and watershed elevation on the distribution of sediment particle size in front of the downstream weirs.The results show that the larger the watershed area,the smaller the sediment particle size and the size D＜1 mm;The vegetation coverage has no trend screening effect on the sediment in front of the,and the altitude of the watershed has little effect;The influencing factors for sediment with particle size D＞5 mm,from high to low are:forest coverage＞proportion of farmland＞river slope＞watershed area.The influencing factors for sediment with particle size D＜5 mm,from high to low are:watershed area＞forest coverage＞proportion of farmland＞river slope.The research results can provide scientific basis for soil erosion control in the loess hilly and gully areas of the Loess Plateau.关键词
黄土丘陵/沟壑区/流域/森林覆盖率/泥沙粒径Key words
Loess Plateau/gully region/watershed/forest coverage/sediment particle size分类
建筑与水利引用本文复制引用
魏天兴,荆丽波,缪今典,张晓明,侯磊..小流域地理特征及土地利用对流域输沙粒径的影响[J].泥沙研究,2025,50(4):23-29,7.基金项目
国家重点研发课题(2022YFF1300801) （2022YFF1300801）
