土壤饱和导水率的多尺度预测模型与转换关系

运用联合多重分形方法研究不同土层土壤饱和导水率与土壤基本物理特性的多尺度相关性,建立不同土层土壤饱和导水率的多尺度预测模型,构建不同土层土壤饱和导水率之间的转换关系。结果表明:不同土层土壤饱和导水率与土壤基本物理特性的相关程度排序不同;在单一尺度和多尺度上,0~20 cm土层土壤饱和导水率与土壤基本物理特性的相关程度排序相同,20~40 cm土层土壤饱和导水率与土壤基本物理特性的相关程度排序不同;土壤饱和导水率多尺度预测模型的预测精度较高,0~20 cm土层和20~40 cm土层拟合值的均方根误差分别为0.035 0和0.029 0;0~20 cm土层和20~40 cm土层土壤饱和导水率转换关系的计算精度较高,拟合值的均方根误差为0.037 5。

Multi-scale prediction model and transformation relation of soil saturated hydraulic conductivity

n this study, the relationships between soil saturated hydraulic conductivity and physical properties in different soil layers was examined with joint multifractal method, multi-scale prediction model of soil saturated hydraulic conductivity with above conclusions educed was established, and transformation relation of soil saturated hydraulic conductivity between different soil layers was constructed. The results showed that sorting of correlation degree between soil saturated hydraulic conductivity and physical properties in different soil layers was different; at single scale and multi-scale, sorting of correlation degree between soil saturated hydraulic conductivity and physical properties in 0-20 cm soil layer was same, and one in 20-40 cm soil layer was different; developed multi-scale prediction models of soil saturated hydraulic conductivity had high precision, and root mean square error of fitted soil saturated hydraulic conductivity in 0-20 cm and 20-40 cm soil layers was 0.035 0 and 0.029 0, respectively; precision of transformation relation of soil saturated hydraulic conductivity between 0-20 cm and 20-40 cm soil layers was high, and root mean square error of fitted soil saturated hydraulic conductivity was 0.037 5.