摘要
[目的]明确黄河源区高寒草地草毡层滑塌体入渗过程及特征,为黄河源区高寒草地草毡层滑塌变形破坏防治和水土保持工作提供数据基础和理论依据。[方法]以黄河源区高寒草地草毡层滑塌体为研究对象,通过双环入渗试验,获得黄河源鄂陵湖区斜坡草毡层滑塌体入渗速率与时间关系曲线,明确适宜入渗模型。[结果]黄河源区高寒草地草毡层滑塌体入渗曲线总体上表现出入渗速率随入渗时间的增加先急剧减小后逐渐趋于平缓的变化趋势;3个试验点的平均渗透系数分别为(5.81±2.18)×10^(-3)cm/s,(4.53±0.82)×10^(-3)cm/s和(4.42±0.51)×10^(-3)cm/s,相互之间不存在显著差异性。相比于Kostiakov模型和通用经验模型,Horton模型对研究区高寒草地草毡层滑塌体水分入渗过程的模拟具有较高的适用性。[结论]黄河源区高寒草地草毡层滑塌体水分入渗过程使用Horton模型模拟较为适宜。
[Objective]The infiltration process and characteristics of the slump body in the alpine grassland blanket layer in the source region of the Yellow River were analyzed to provide data and theoretical basis for the slump body deformation and damage prevention and soil and water conservation.[Methods]This study used the alpine grass felt layer slump body in the source area of the Yellow River as the research object.The relationship curve between infiltration rate and time and the permeability coefficient of the slope grass felt layer slump body in the Eling Lake area of the Yellow River source were obtained through the double loop permeability test,and the suitable permeability model was determined.[Results]The infiltration rate of the grass felt layer slump body in the study area generally decreased sharply and then gradually flattened with the increase of infiltration time.The average permeability coefficients of the three test points were(5.81±2.18)×10^(-3),(4.53±0.82)×10^(-3),and(4.42±0.51)×10^(-3)cm/s,respectively,and there was no significant difference between each other.Compared to the Kostiakov model and the general empirical model,the Horton model had a higher applicability in simulating the water infiltration process of the grass felt layer slump body in the study area.[Conclusion]The Horton model is more suitable for simulating the water infiltration process of the grass felt layer slump body.
作者
徐得忠
李华坦
张鹏飞
王泽磊
梁燊
庞景豪
刘亚斌
Xu Dezhong;Li Huatan;Zhang Pengfei;Wang Zelei;Liang Shen;Pang Jinghao;Liu Yabin(Xining Natural Resources Comprehensive Survey,China Geological Survey,Xining,Qinghai 810000,China;School of Geological Engineering,Qinghai University,Xining,Qinghai 810016,China;Key Laboratory of Cenozoic Resources and Environment on the Northern Edge of the Qinghai-Xizang Plateau,Xining,Qinghai 810016,China)
出处
《水土保持通报》
CSCD
北大核心
2024年第5期19-27,共9页
Bulletin of Soil and Water Conservation
基金
中国地质调查局项目“黄河源鄂陵湖-扎陵湖地区生态保护修复支撑调查”(DD20220960)。
关键词
黄河源
草毡层滑塌体
渗透系数
入渗模型
水土流失
Yellow River source
grass felt layer slump body
permeability coefficient
penetration model
soil erosion
