System dynamics modeling of infiltration and drainage in layered coarse soil

作者：Huang Mingbin; Elshorbagy Amin^*; Barbour S Lee; Zettl Julie D; Si Bing Cheng

来源：Canadian Journal of Soil Science, 2011, 91(2): 185-197.

DOI：10.4141/CJSS10009

• System dynamics model
• infiltration
• drainage
• layered soils

Huang, M., Elshorbagy, A., Barbour, S. L., Zettl, J. D. and Si, B. C. 2011. System dynamics modeling of infiltration and drainage in layered coarse soil. Can. J. Soil Sci. 91: 185-197. A system dynamics (SD) model was developed to simulate transient infiltration and drainage processes in multilayered soils. STELLA Software was used as a stock-flow icon-based simulation environment. The developed SD model combined both physically based formulations and empirical assumptions to describe one-dimensional saturated unsaturated water flow in the vadose zone. The model was successfully calibrated and validated using measured water contents during the infiltration and drainage phases, respectively, of a double-ring infiltration test. The simulation results were also compared with a finite element model of saturated/unsaturated flow (HYDRUS). The results showed that the SD model was capable of accurately simulating the various hydrological processes in multilayered soils, and could be a useful tool for designing reclamation covers. The simulated and measured results show that the presence of a finer sand layer overlying a coarse sand layer will increase the soil water storage at field capacity.

• 出版日期2011-5
• 单位Saskatoon; Saskatchewan