关键词：
Guelph入渗仪;土地利用类型;土壤入渗性能;野外测定;室内模拟
摘 要：
【目的】验证Guelph入渗仪进行室内模拟的可行性以及研究松华坝水源区不同土地利用类型对土壤入渗性能的影响。【方法】利用Guelph入渗仪通过野外测定和室内模拟研究了林地、林改坡地和坡耕地土壤水分入渗过程。【结果】通过野外测定,土壤入渗性能强弱表现为林地>林改坡地>坡耕地,室内模拟的结果与其一致,且两种方法的结果显著相关;通过对土壤入渗性能与影响土壤入渗因素的相关分析发现,含水率、砂粒、容重、总孔隙度是影响土壤入渗性能的重要因素;利用3种公式对野外测定的土壤入渗速率进行拟合,Kostiakov公式拟合效果最好,通用经验公式次之,Philip公式还存在一定的偏差。【结论】利用Guelph入渗仪进行室内模拟可以很好地反映土壤渗透性能,更易控制实验条件,还可以观测到指标的变化过程,土壤入渗量和湿润锋等指标的测定更能全面地表达土壤入渗性能。
译 名：
Application of Guelph Permeameter in Determining the Soil Permeability of the Songhuaba Water Source Area in Kunming City
作 者：
ZHAI Zi-ning;WANG Ke-qin;SU Bei;College of Environment Science and Engineering,Southwest Forestry University;
关键词：
Guelph permeameter;;land utilization types;;soil infiltration capacity;;field measurement;;simulated experiments
摘 要：
【Objective】The aim of the study was to validate the feasibility of simulated experiments by Guelph permeameter,and to study the impacts of different land use types on the soil infiltration capacity in Songhuaba water source area.【Method】Soil infiltration capacity of three land use types was measured by using Guelph permeameter in both lab and field experiments.【Result】Soil infiltration capacity decreased in the order as follows: woodland>woodland instead of slope land> slope land. Laboratory simulation has also similar result. Pearson correlation showed that water content,sand contents,bulk density and total porosity were correlated with soil infiltration capacity. The fitting effect of Kostiakov equation was the best one among the three equations noted in the study.【Conclusion】Simulated experiments with Guelph permeameter can well indicate soil permeability and it may be easier to control experimental conditions and to observe index change process. Therefore,soil infiltration and wetting front can fully reflect soil infiltration capability.
