›› 2011, Vol. 25 ›› Issue (2): 58-.

• 工程实录 • 上一篇    下一篇

土壤介电常数—含水量关系模型的比较

 刘华贵, 曾 健   

  1. (广西大学土木建筑工程学院,南宁 530004)
  • 收稿日期:2010-05-14 出版日期:2011-04-20 发布日期:2012-01-13
  • 作者简介:刘华贵,男,1984年生,硕士,主要从事特殊土方面的研究工作。 

Comparison of Soil Dielectric Constant-Water Content Models

LIU  Hua  gui, ZENG  Jian   

  1. (College of Civil Engineering,Guangxi University,Nanning  530004, China)
  • Received:2010-05-14 Online:2011-04-20 Published:2012-01-13

摘要: 土壤介电常数-含水量关系模型是TDR法测量含水量的基础,比较了Topp模型、混合模型以及扩散模型的特点,并通过实测数据分析各模型产生误差的原因,结果发现混合模型与扩散模型中未知参量随机性大且不易确定,Topp模型虽因未考虑土壤的组分而导致产生偏差,但经简单修正后在实际应用中仍能得到良好的拟合效果。

Abstract: The Time Domain Reflectometry(TDR) used to estimate soil water content was based on the relationship of soil dielectric constant\|water content. Errors of Topp model, Mixing model and Diffusion model were analyzed with test results. Test results show that parameters of Mixing model and Diffusion model are too randomly to be determined, but parameters of Topp model with neglecting the forms of soil component can be used in engineering with proper revising in despite of the error in the model.