Modelling of soil solid thermal conductivity

摘要: Abstract Soil solid thermal conductivity (λs) is critical to model effective soil (λeff) that required for engineering design and estimate of surface energy flux temperature. However, it impossible measure λs because a porous medium there no way compact the continuous state without any pore spaces. The indirect estimation requires saturation soils or complete mineralogical information mineral component such as quartz has much greater conductivity. Therefore, many approximation approaches various complexities predict have been proposed. few studies conducted assess these models. An extensive review were returned 20 models calculate λs. These categorized their performances assessed with compiled dataset consisting 65 from five studies. results showed Johansen approach can give satisfactory given content available (RMSE = 0.60 W m−1 °C−1, NSE = 0.91) Tarnawski et al. suitable Canadian (RMSE = 0.55 W m−1 °C−1, NSE = 0.92). Cote Konrad inversely based on geometric mean measured at full (λsat) accurate (RMSE = 0.22 W m−1 °C−1, NSE = 0.99), but cannot be applied λsat measurement. other take use dryness (λdry) unsatisfactory new three-point method (three measurements between λdry λsat) He was proposed this provides reliable (RMSE = 0.17 W m−1 °C−1, NSE = 0.99) textures water contents knowledge information.