常温土壤导热系数模型评价及改进

导热系数是土壤热传递的基本参数,在许多领域发挥着重要作用.土壤导热系数的获得需要耗费大量的时间和精力,为了方便准确地获得土壤导热系数,将5种土壤导热系数实测值与Campbell、Johansen、C?té-Konrad以及Lu-Ren导热系数模型计算值进行了比较,并且引入了一个与土壤质地有关的参数F对误差较大的Camp...

Evaluation and Improvement of Thermal Conductivity Model of Room Temperature Soil

Thermal conductivity is the basic parameter of soil heat transfer and plays an important role in many fields.The acquisition of soil thermal conductivity takes a lot of time and effort.In order to acquire the thermal conductivity of soil accurately,in this paper,the measured thermal conductivity values of 5 soil samples was compared with the predicted values of Campbell,Johansen,Cote-Konrad and Lu-Ren thermal models.A new parameter F related to soil texture was introduced to improve the Campbell model with large deviations.The NSE,RMSE,and PBISA of the improved Campbell model ranged from 0.938 to 0.996,0.039 to 0.084 and-0.067 to 0.016,respectively,which were considerably better than those of the Campbell model(0.632 to 0.975,0.089 to 0.217 and-0.011 to 0.252).Then,the thermal conductivity values of 10 soil samples from other regions were used to verify the improved model.The results showed that the predicted value of soil thermal conductivity was stably distributed around the 1∶1 line,and the modified model could also accurately calculate the soil thermal conductivity in other areas.