Abstract

This study presents assessments on the spatial variability of a soil landslide in the three gorges reservoir in China. Results challenge the idea that variability of permeability within a landslide is secondar. Consequently, it can't be assessed through single representative values. It was found that its variability spans two orders of magnitude, a consequence of it being influenced by both morphology and regolith properties. Identification of zones that display comparable behavior can be done through assessment of remote sensing images collected by drones; as growth patterns of vegetation correspond well with zones that displayed similar permeability coefficients within the landslide body. Furthermore, extensive variability of permeability was caused by a diverse range of seepage mechanisms, namely pipe network flow, interface network seepage and pore water seepage. Thus, the hydraulic behavior of large landslide bodies is remarkably complex.

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