改进的圆盘渗透仪计算模型  

An Improved Calculation Model Based on the Disc Infiltration Meter

作　　者：邹朝望[1] 李杰[2] 

机构地区：[1]国家农业信息化工程技术研究中心 [2]湖北省水利水电勘测设计院水保总站,武汉430064

出　　处：《中国农村水利水电》2006年第1期109-112,114,共5页China Rural Water and Hydropower

基　　金：国家自然科学基金资助(50279038)

摘　　要：圆盘渗透仪是一种目前常用的田间测定土壤导水参数的仪器,利用测量得到的入渗数据,国内外学者推导出了一系列推导土壤导水参数的计算方法。这些方法经过逐步改进,日趋成熟。本研究主要是针对Zhang模型中不能准确估计宏观毛管上升高度的缺点,用Philip的导水率曲线代替Ankeny等方法的近似公式来改进Zhang模型,用大量的模拟和实验的数据对比分析现有方法和新方法,新方法提供了更精确的估计值。The disc infiltration meter has been a device for field in-situation measurements of soil conductivity parameters. Several methods have been developed to calculate soil conductivity parameters by scholars domestic and abroad. These methods are improved in practical use and are quite developed. In this study, aiming at the faults in Zhang＇s model, which can＇t estimate the macroscopic capillary height, we take the hydraulic conductivity curve of Philip to replace approximately the model of Ankeny to improve Zhang＂ s model. Compared with other methods through numerically simulation and experimental data, the new proposed method can provide more accurate and stable estimations of the soil hydraulic properties.

关 键 词：圆盘渗透仪 导水参数 水力传导度 

分 类 号：S152.72[农业科学—土壤学]