Accurate and continuous measurements of soil thermal and hydraulic propertiesare required for environmental, Earth and planetary science, and engineering applications, but they are not practicallyobtained by steady-state methods. The heat pulse (HP) method is a transient method for determinationof soil thermal properties and a wide range of other physical properties in laboratory and field conditions. The HP method is based on the line-heat source solution of the radial heat flow equation. This literature review begins with a discussion of the evolution of the HP method and related applications, followed by the principal theories, data interpretation methods and their differences. Important factors for HP probe construction are presented. The properties determined in unfrozen and frozen soilsare discussed, followed by a discussion of limitations and perspectives for the application of this method. The paper closes with a brief overview of future needs and opportunities for further development and application of the HP method.

中文翻译：

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热脉冲法在土壤物理测量中的开发与应用

环境、地球和行星科学以及工程应用需要准确和连续测量土壤热和水力特性，但实际上无法通过稳态方法获得。热脉冲 (HP) 法是一种瞬态方法，用于在实验室和现场条件下测定土壤热特性和其他各种物理特性。HP 方法基于径向热流方程的线热源解。本文献综述首先讨论 HP 方法的演变和相关应用，然后是主要理论、数据解释方法及其差异。介绍了 HP 探头结构的重要因素。讨论了在未冻土和冻土中测定的特性，随后讨论了该方法应用的局限性和前景。本文最后简要概述了 HP 方法进一步开发和应用的未来需求和机会。