选取四川省盐亭县陈家湾小流域为研究对象,使用环刀法对紫色土土壤水分入渗规律、不同土地利用方式下土壤入渗性能进行了研究,分析了容重、坡度、坡向对土壤入渗性能的影响.结果表明:紫色土土壤水分入渗速率随着时间增加呈下降趋势,25～30 min达到稳定入渗阶段,土壤水分入渗过程可用Horton公式较好描述.随着坡度的增加,土壤入渗速率增加,不同坡向土壤水分稳定入渗速率表现为半阴坡＞半阳坡＞阳坡.土壤容重与土壤入渗速率呈负相关关系,随着土壤容重的增加,土壤入渗速率减小.不同土地利用方式下,耕地的土壤稳渗速率大于林地.%The soil water infiltration process of purple soil and soil infiltration performance under different land use were studied by using the method of core sampler. Influences of soil bulk density, slope, slope aspect on soil infiltration were analyzed. The Chenjiawan watershed of Yanting County in Sichuan Province was chosen as a study area. The results indicated that the rate of soil water infiltration of purple soil decreased with the increase of infiltration time initially, and came into stable situation after 25～30 minutes.The Horton Empirical formula coud simulate the process of soil water infiltration properly. The soil stable infiltration rates changed with different slope aspect as following: semi-shady slope ＞semi-sunny slope＞sunny slope. The soil bulk density was negatively correlated with soil infiltration rates, the soil infiltration rates decreased as soil bulk density increased. Under different land use types, infiltration of farmland was bigger than that of forestry land.
展开▼
