Seasonal Characteristics of Pore Development and Hydraulic Properties of Surface Soil in Two Forested Watershed
2009
Joo, S.H., Pusan National University, Busan, Republic of Korea | Gwak, Y.S., Pusan National University, Busan, Republic of Korea | Kim, S.J., Yonsei University, Seoul, Republic of Korea | Kim, J., Yonsei University, Seoul, Republic of Korea | Kim, S.H., Pusan National University, Busan, Republic of Korea
Configuration of soil hydraulic property is an essential component to understand the hydrological processes at the hillslope scale. In this study, we investigated temporal variations in pore development and soil hydraulic properties during the period from March to October in 2008. Characteristics for macropore flow and hydraulic conductivity were measured at two hillslopes: one is the hillslope located in Gwangneung Research Forest. Vertical fluxes through macropore were measured using a tension infiltrometer at the depth of surface. The saturated hydraulic conductivities in March, June, July and September were relatively high compared to those in May and October. Temporal variations in several soil hydraulic features could be explained by the differences in vegetation activity and soil moisture content determined by antecedent precipitation. Particularly, the features of macropores had a substantial impact on hydraulic conductivity in the forest hillslope. The nonuniformity of the soil hydraulic properties observed in the study manifests the dynamic features of hydrological processes in the hillslope scale and the experimental results will be useful to understand the internal hydrological processes in the mountainous hillslope.
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