The evaluation/application of Hydrus-2D model for simulating macro-pores flow in loess soil

International Soil and Water Conservation Research

Sajjad Raza¹  Xuexuan Xu²  Wen yuan Chen²  Shahmir Ali Kalhoro² 

[1] Institute of Soil and Environmental Sciences, University of Agriculture, Faisalabad 38040, Pakistan;Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China;

关键词: Hydrus-2D model;    Macro-pores;    Soil infiltration;    Wetting front movement;   

DOI  :  10.1016/j.iswcr.2017.05.010

来源: DOAJ

【 摘 要 】

Soil hydraulic properties were mainly governed by soil structures especially when the structures is full of the connected soil macro-pores. Therefore, the good hydrological models need to be well documented for revealing the process of soil water movement affected by soil medium. The Hydrus-2D model with double domain was recommended in simulating water movement in a heterogeneous medium of soil. To evaluate the performance of the double domain Hydrus-2D model in loess soil, the dynamic of soil wetting front movement in differential loess soil columns under the constant water head were observed and the processes was simulated by Hydrus-2D model under conditions of different soil properties. The results indicated that the Hydrus-2D model was quite good in simulation of loess soil water movements, and the relative errors of simulation results are less than 15%, MRE less than 5%, and R2>0.9. The results provided the appropriate infiltration parameters of loess soil.

【 授权许可】

Unknown