华中师范大学学报（自然科学版）2012，Vol.46Issue(1)：104-108,5.
浅层地温剖面曲线拟合法估算热扩散系数
Estimation of thermal diffusivity using subsurface temperature profile curve fitting algorithm
摘要
Abstract
Based on the theory of heat transfer and thermal diffusion in subsurface soil, a mathematical equation was derived for describing the temperature fluctuation in a semi-infinite homogeneous soil, this equation can be used to fit the temperature profile curves of drill hole to estimate the gross thermal diffusivity of subsurface soil and ground temperature parameters, such as the mean surface temperature, the annual temperature amplitude at the surface, the day of minimum surface temperature . Results of two examples show that the theoretical model fits the measured temperature profile curve very well, and the diffusivity values of subsurface soil obtained by the new method are rather close to that from references, indicating that the algorithm is feasible. The algorithm can be widely applied in practical work since it is simple, convenient and effective,and based on the reliable theory and clear physical mechanism.关键词
热扩散系数/浅层地温/曲线拟合Key words
thermal diffusivity/ subsurface temperature/ curve fitting.分类
天文与地球科学引用本文复制引用
何报寅,刘杰,徐贵来,丁超,刘红卫,杨柳..浅层地温剖面曲线拟合法估算热扩散系数[J].华中师范大学学报（自然科学版）,2012,46(1):104-108,5.基金项目
国家自然科学基金项目(51079137) （51079137）
中国科学院知识创新工程重要方向项目(kzcx2-yw-141) （kzcx2-yw-141）
湖北省地质矿产勘查开发局课题(0703). （0703）
