Hydrological hotspots in blanket peatlands: spatial variation in peat permeability around a natural soil pipe

摘要: [1] Measurements were made of the hydraulic conductivity (K) peat around a natural soil pipe in blanket bog. This is first investigation decimeter-scale variability both vertical K and horizontal peats, which found to be higher than indicated by previous research. information suggests that it may appropriate reconsider (I) spatial sampling strategies employed investigate subsurface flow peatlands, (II) how field data are used parameterize models. Critically, there was structure heterogeneity, with wedge high-K directly above forming hydrological conduit between near-surface perennially flowing pipe. There also significantly greater parallel pipe's orientation compared perpendicular Determinations triaxial anisotropy K, undertaken for time soils, revealed substantial directional variations K. The pipe-peat interface investigated; however, sample length dependency samples precluded hypothesized low-K skin