Fig. 6 Dominant hydrological pathways in typical Girnock hillslope: 1: vertical percolation through podzolic soils, 2: lateral flow at permeability boundaries, 3: exfiltration of hillslope groundwater in saturated valley bottom areas with gley soils, and 4: saturation overland flow on peat and 5: deeper groundwater flow. Insets show profiles of dominant soils and travel time distributions as probability density functions for major soil horizons, groundwater and the stream channel.