一种新的土壤冻融特征曲线模型
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付子腾, 吴青柏, DYCK Miles, 何海龙
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A new model to describe soil freezing-thawing characteristic curve
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Ziteng FU, Qingbai WU, Miles DYCK, Hailong HE
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表5 式(18)和式(19)在不同溶质浓度土壤中的拟合指标,式(19)中的值分别用经验公式(20)计算和参数拟合
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Table 5 The statistical indexes of Eq.(18) and Eq.(19) in different soil solute concentrations, the values of Tfin Eq.(19) are calculated by the Eq.(20) and by parameter fitting, respectively
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条件 | 溶质浓度/(g·L-1 NaCl) | α | β | Tf /℃ | RMSE/(cm3·cm-3) | AD/(cm3·cm-3) | NSE | 综合指标 |
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不考虑Tf ,用式(19)计算 | 0 | 18.41 | 1.46 | | 0.015 | -0.0005 | 0.951 | RMSE=0.014 AD=0.00007 NSE=0.960 | 10 | 1.87 | 1.86 | | 0.005 | -0.0002 | 0.992 | 20 | 0.65 | 2.42 | | 0.017 | 0.0020 | 0.952 | 35 | 0.33 | 2.81 | | 0.016 | -0.0001 | 0.877 | 考虑Tf,用式(20)计算,且Tf通过经验公式得到 | 0 | 18.41 | 1.46 | 0 | 0.015 | -0.0050 | 0.951 | RMSE=0.013 AD=-0.0002 NSE=0.965 | 10 | 2.89 | 1.70 | 0.61 | 0.006 | -0.0003 | 0.984 | 20 | 1.58 | 1.81 | 1.22 | 0.010 | 0.0007 | 0.985 | 35 | 1.15 | 1.76 | 2.09 | 0.017 | 0.0002 | 0.856 | 考虑Tf,用式(20)计算,且Tf通过参数拟合得到 | 0 | 18.41 | 1.46 | 0 | 0.015 | -0.005 | 0.951 | RMSE=0.013 AD=-0.0002 NSE=0.965 | 10 | 1.87 | 1.86 | 0 | 0.005 | -0.002 | 0.992 | 20 | 3.98 | 1.52 | 4.33 | 0.003 | -0.001 | 1 | 35 | 0.57 | 2.18 | 0.60 | 0.017 | -0.002 | 0.897 |
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