土壤优先流的离子显色示踪技术与分形模型模拟方法研究Characterizing Preferential Flow Using Iodine-Starch Staining Method and Active Region Model

盛 丰
2012 Journal of Water Resources Research  
To capture the heterogeneous flow pattern and enhance the prediction accuracy of preferential flow in unsaturated soil, the iodine-starch staining method was applied to visualize the preferential flow pattern from the background in this research. The digital imaging procedure was conducted to obtain the heterogeneous distribution pattern of preferential flow paths, and soil sampling was conducted to obtain the heterogeneous distributions of soil water content and solute concentration in the
more » ... erential flow region. The measured distributions of soil water content and solute concentration resulted from preferential flow were simulated and predicted using the active region model (ARM) and the mobile-immobile region model (MIM). The modeling efficiency using ARM and MIM were quantitatively evaluated and compared using the relative root mean square error (RRMSE) analysis. The model evaluation and comparison revealed that, ARM produced more accurate infiltration depth, and soil water and solute concentration distributions predictions, showing the ARM captured the macroscopic behavior of preferential flow and transport well.
doi:10.4236/jwrr.2012.13012 fatcat:qqklmgqtjzapdcsheyvty5piau