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根据土壤水平一维入渗推求紫色土水动力学参数
引用本文:程冬兵,张平仓,李亚龙,蔡崇法.根据土壤水平一维入渗推求紫色土水动力学参数[J].中国生态农业学报,2010,18(5):1007-1012.
作者姓名:程冬兵  张平仓  李亚龙  蔡崇法
作者单位:1. 长江科学院水土保持研究所,武汉,430010
2. 华中农业大学资源与环境学院,武汉,430070
基金项目:长江科学院中央级公益性科研院所基本科研业务费专项资金项目(YJJ0902/TB01)
摘    要:选择3种不同质地的紫色土,通过室内土壤水平一维入渗试验,探讨简单入渗法和入渗特性法推求水动力学参数对于紫色土的适用性。结果显示,简单入渗法和入渗特性法推求的水动力学参数中,水分特征曲线准确性较高,水分扩散率和非饱和导水率准确性较差。简单入渗法推求的水分扩散率和非饱和导水率均低于实测值1~2个数量级,但推求值与实测值曲线趋势较为一致。入渗特性法推求的水分扩散率和非饱和导水率在高含水量小于实测值,在低含水量大于实测值,推求值随含水量变化趋势响应缓慢。

关 键 词:水平一维入渗  紫色土  水动力学参数  简单入渗法  入渗特性法
收稿时间:2009/11/19 0:00:00
修稿时间:2010/1/26 0:00:00

Determination of hydraulic properties of purple soils via one-dimensional horizontal infiltration
CHENG Dong-Bing,ZHANG Ping-Cang,LI Ya-Long and CAI Chong-Fa.Determination of hydraulic properties of purple soils via one-dimensional horizontal infiltration[J].Chinese Journal of Eco-Agriculture,2010,18(5):1007-1012.
Authors:CHENG Dong-Bing  ZHANG Ping-Cang  LI Ya-Long and CAI Chong-Fa
Institution:Department of Soils and Water Conservation, Changjiang River Scientific Research Institute, Wuhan 430010, China;Department of Soils and Water Conservation, Changjiang River Scientific Research Institute, Wuhan 430010, China;Department of Soils and Water Conservation, Changjiang River Scientific Research Institute, Wuhan 430010, China;College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
Abstract:he hydraulic properties of three unsaturated purple soils were determined by a simple horizontal infiltration method in one-dimensional horizontal infiltration experiment. While the study accurately estimates soil water retention curve, its estimates of soil water diffusion and conductivity are not very accurate. Estimated soil water diffusion and conductivity of the three purple soils by the simple infiltration method are 1~2 order of magnitude lower than that of the measured values. However, the model-estimated and measured variation tendencies of soil water diffusion and conductivity are similar. Under high soil water conditions, the estimated soil water diffusion and conductivity by the horizontal infiltration method are lower than that of the measured values. However, under low soil water conditions, the estimated soil water diffusion and conductivity by the horizontal infiltration method are higher than that of the measured values. This suggests that the model slowly responds to soil water change.
Keywords:Horizontal one-dimension infiltration  Purple soil  Hydraulic property  Simple infiltration method  Horizontal infiltration method
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