森林与环境学报2026，Vol.46Issue(3)：277-286,10.DOI:10.13324/j.cnki.jfcf.202509015
砾石含量对崩积体基质及优先流入渗的影响与微观机制
Influences of gravel content on matrix and preferential flow infiltration in colluvial deposits and the microscopic mechanisms
摘要
Abstract
To explore the influences of gravel content on the matrix and preferential flow infiltration in colluvial deposits and its microscopic mechanisms in Benggang,this study prepared five soil-rock mixtures with gravel mass content of 30%,40%,50%,60%,and 70%.CT scan and surface ring infiltration method were adopted to study the pore conditions and infiltration characteristics of colluvial deposits.The results showed that the presence of gravel reduced the number and roundness of pores,while increasing the total pore area,average pore diameter,and connectivity(P<0.05).With the increase in gravel content,all parameters of total infiltration,matrix infiltration,and preferential flow infiltration(initial infiltration rate,turning infiltration rate,steady infiltration rate,and average infiltration rate)showed an overall increasing trend.For colluvial deposits with gravel content of 30%and 40%,matrix infiltration dominated only in the initial stage,while for those with gravel content of 60%and 70%,preferential infiltration dominated in all stages,and the contribution rate of preferential infiltration to total infiltration reached 79%.All infiltration parameters showed positive correlations with pore ratio,average pore diameter,connectivity,and effective pore specific surface area(P<0.05).Among them,pore connectivity had the most prominent impacts on both matrix infiltration and preferential flow infiltration.In conclusion,gravel content mainly promotes matrix and preferential flow infiltration in colluvial deposits by enhancing pore connectivity,thereby affecting total infiltration.关键词
砾石/崩积体/土石混合物/孔隙特征/土壤入渗/崩岗/表置环式入渗仪Key words
gravel/colluvial deposit/soil-rock mixture/pore characteristics/soil infiltration/slope collapse/surface ring infiltration meter分类
农业科技引用本文复制引用
谢小芳,詹振芝,杨茂进,陈杜斌,洪婧瑜,黄炎和..砾石含量对崩积体基质及优先流入渗的影响与微观机制[J].森林与环境学报,2026,46(3):277-286,10.基金项目
水利部重大科技项目"南方花岗岩崩岗生态治理技术研发与示范"(SKS2022073). （SKS2022073）
