3种入渗测定方法在崩岗不同土层的应用比较

Comparing Three Methods for Soil Infiltration Measurement in Different Soil Layers of Collapsing Hill

采用3种不同土壤入渗方法(双环法、环刀法和土壤入渗自动测量系统),研究安溪县龙门镇的崩岗崩壁3个土层的入渗情况及不同入渗方法的差异。结果表明,3种方法得到的入渗速率与入渗时间的关系有一定差异,其中土壤入渗自动测量系统的拟合效果最好;自动测量系统对土壤的扰动极小,也能避免代表性差的问题,结果比较准确,且操作和计算方便,试验周期短,适合野外崩壁土层土壤入渗试验。影响崩岗土层土壤入渗因子主要为土壤机械组成和有机质含量。

This study measured soil infiltration rates of 3different soil layers by using 3different methods（double-ring method,cutting ring method,and automatic measurement system）in collapsing hill of Longmen Town,Anxi County,and the differences in 3measurement methods were investigated.The results showed that the relationship between soil infiltration rate and infiltration time differed when different measurement methods were used,with the automatic measurement system showing the best fitting effect.Automatic measurement system only caused slight disturbance of soil and could avoid the problem of poor representation.The results measured by automatic measurement system were more accurate.Automatic measurement system was convenient to use and the computational procedures were simple.It is more suitable to use automatic measurement system to measure soil infiltration in collapsing hill.The main influencing factors of soil infiltration in collapsing hill were soil organic matter content and soil mechanical composition.