摘要
土壤中碎石的存在改变了土壤结构和土壤水分运动规律,为研究碎石含量和碎石粒径对土石混合介质水分入渗特性的影响,利用垂直一维积水入渗试验资料对其进行分析。结果表明:土石混合介质的累积入渗量和湿润锋推进速度均小于细土,碎石含量对累积入渗量和湿润锋的影响存在一个转折点,该转折点因粒级不同而不同;碎石含量对含水量剖面的影响表现为含水量随含石量增加而下降;碎石粒径只对混合介质本身的物理特性有影响,对水分入渗无明显影响。
Soil＇s structure and movement law of soil water is changed by rock fragment,in order to study the influence of rock fragment content and particle size on water infiltration characteristics of stony-soil medium,one dimensional vertical soil column ponding infiltration experiment under the condition of constant water head was conducted to illustrate it.Major findings are as follows： the accumulative infiltration and advancing process of wetting front of stony-soil are all smaller than pure soil,effect of rock fragment content on accumulative infiltration and wetting front exists a milestone which different with rock fragment particle size;water content at same depth become lower when rock fragment content is higher.Rock fragment particle size only affects the inherent characteristics of rock fragment,but no distinct influences was observed of rock fragment particle size on water infiltration.
出处
《水土保持学报》
CSCD
北大核心
2009年第5期87-90,132,共5页
Journal of Soil and Water Conservation
基金
国家科技支撑项目(2007BAD38B03)
新疆自治区重大专项(200731136-5)
关键词
土石混合介质
碎石含量
碎石粒径
水分入渗特性
stony-soil medium rock fragment content rock fragment particle size water infiltration characteristics
