Observation and modeling on irregular purple soil water infiltration process

• 来源期刊: 山地科学学报（英文版）
• 年，卷（期）: 2017,（6）
• 页码范围: 1076-1085
• 页数: 10页
• 语种: 英文
• DOI: 10.1007/s11629-015-3737-x

摘要

The infiltration process is a critical link between surface water and groundwater.In this research,a specific device to observe infiltration processes in homogeneous and heterogeneous soils with triangular and inverted triangular profiles was designed,and the Green-Ampt model was employed for the process simulation.The results indicate that (1) the wetting front in coarse texture soils transports faster than in fine texture soils;(2) for the homogeneous case,the wetting front in triangularshaped soils transports faster than the inverted triangular type,but the triangular-shaped soils show a lower infiltration rate;(3) in the initial step,the wetting front in tdangular-shaped soils shows higher transport speed,but depicts lower speed with increase in the time;(4) both the wetting front and infiltration rate show a significant exponential relation with the time.From these findings,an empirical model was developed which agrees well with the observed data and provides a useful method for this field of soil research.