Observation and modeling on irregular purple soil water infiltration process
Observation and modeling on irregular purple soil water infiltration process作者机构：Changjiang River Scientific Research Institute Changjiang Water Resources Commission Wuhan 430010 China
出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)
年 卷 期：2017年第14卷第6期
页 面：1076-1085页
核心收录：
学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学]
基 金：supported by the National Natural Science Foundation of China (Grant No. 41201268)
主 题：Purple soil Triangular profile Inverted triangular profiles Soil water infiltration Empirical modeling
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 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.
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