Vol14 No.6: 1076-1085
【Title】Observation and modeling on irregular purple soil water infiltration process
【Author】CHENG Dong-bing*; DONG Lin-yao; QIAN Feng; SUN Bei
【Addresses】Changjiang River Scientific Research Institute, Changjiang Water Resources Commission, Wuhan 430010, China
【Citation】Cheng DB, Dong LY, Qian F, Sun B(2017) Observation and modeling on irregular purple soil water infiltration process. Journal of Mountain Science 14(6). DOI: 10.1007/s11629-015-3737-x
【Abstract】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 triangular-shaped 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 triangular-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.
【Keywords】Purple soil; Triangular profile; Inverted triangular profiles; Soil water infiltration; Empirical modeling