非饱和土壤导水率试验计算与模拟分析

Analysis about the measurement and the simulation of unsaturated soil hydraulic conductivity

以非饱和土壤导水率作为研究对象,用瞬时剖面法计算两种土壤非饱和土壤导水率,并与RETC中不同模型的模拟结果进行对比,研究瞬时剖面法计算结果的可靠性。结果表明:两种土壤的K-h与lgK-h模拟曲线和实测值均吻合较好,实测值和不同模型的模拟值均属于高度性相关,且K-θ实测曲线与各模型的模拟曲线变化规律相似,处于各模拟曲线之间。综上所述,瞬时剖面法计算结果与模拟结果相似,具有一定的准确性,可以直接使用在实际生产运用过程中。

In order to study unsaturated soil hydraulic conductivity, the unsaturated soil hydraulic conductivity of two kinds of soils was calculated by using both instantaneous profile method and RETC software. And a comparison of these two methods was done. The research shows that the measurement has a good relevance with the simulation data. The experimental data is near to the curve of RETC and the curve of EXP is close to the simulated one. Overall speaking, the result of instantaneous profile method is practicable and has a accurate description of the relationship between the unsaturated soil hydraulic conductivity and water content.