期刊论文

Liu, M.

中文

生态学报

1000-0933

2012

32

3

871-878

10.5846/stxb201103300412

41001125:国家自然科学基金 40801078:国家自然科学基金 2010CDB01205:湖北省自然科学基金 201150431112:武汉市晨光计划

本校为第一且通讯机构

土壤入渗是降雨渗入土体形成土壤水的基本水文过程,土壤渗透能力影响着地表径流和土壤侵蚀强度。土壤初始含水量决定了入渗初期的土水势,是影响土壤入渗过程的重要因素。利用环刀法,观测了三峡库区林地和草地的土壤入渗过程,对比分析了不同初始含水率下土壤入渗率和常用入渗模型的适宜性。结果表明,随土壤初始含水率的增大,林地和草地下土壤初始入渗率减小,入渗趋于稳定所需时间缩短,累积入渗量和稳定入渗率增大。土壤含水率为12%的林地初始入渗率为8.95 mm/min,是含水率40%林地初始入渗率的4倍,但1h累积入渗量仅是含水率40%林地的2/3。有机质含量丰富的草地土壤入渗过程对初始含水率的敏感性较...

Soil infiltration is the basic hydrological process for water penetrating into the soil, and the amount of water infiltrating the soil surface directly affects the quantity of surface runoff and soil erosion, even the recharge of both soil and underground water. The initial soil water content is an important factor to soil infiltration, and its role in runoff controlling and soil erosion prevention has been taken into account by many researches. In this study, the double-ring infiltration method was used to quantitatively measure the infiltrability of surface soil (0-5 cm depth) covered with f...