期刊论文

Wang, H.(wanghuisb@126.com)

中文

农业工程学报

1002-6819

2008

24

5

65-68

10.3321/j.issn:1002-6819.2008.05.014

中国科学院***项目（2004109） 国家自然科学基金资助项目（90502006） 湖南农业大学人才基金资助（06YJ28）

本校为第一且通讯机构

为了研究黄土区降雨前期土壤含水量对不同土壤坡面降雨入渗、产流和产沙特性的影响,采用室内降雨模拟试验方法,探讨了前期土壤含水量从风干土状态至近饱和条件下填土和砂黄土坡面降雨入渗、产流产沙的特征.研究结果表明:在雨强(80mm/h)和坡度(10°)较大情况下,前期土壤含水量对塿士坡面产流时刻、入渗和产流过程影响不明显;砂黄土坡面产流时刻受前期土壤含水量影响显著,随着前期土壤含水量的增大先延长后缩短,其极差值达到28.91min:前期土壤含水量在风干土～10%和15%～25%两段范围内,砂黄土坡面入渗产流规律差异十分显著.基于土壤水分累积入渗过程特征,填土前期含水量可分成"三区",砂黄土则可分...

The effect of antecedent soil moisture content on the characteristics of infiltration, runoff and sediment was investigated by rainfall simulation experiment of lou soil and sand loess. The results show that, under the controlled conditions with rainfall intensity 80 mm/h and slope 10°, the impact of antecedent soil moisture content on initial time of runoff, infiltration process and sediment loss is unapparent for lou soil, while for sand loess, the initial time of runoff is greatly affected by antecedent soil moisture content, which is prolonged firstly and then shorted with the increasi...