Debris flow erosion into bedrock helps to set the pace of mountain denudation, but there are few empirical observations this process. We studied effects debris flows on using Structure-From-Motion photogrammetry and multiple real-time monitoring measurements. found that distribution across channel cross-section could be generalized as an exponentially decreasing function height above thalweg. U...

Abstract. We used numerical modelling to explore the role of vertical compartmentalization hillslopes on groundwater flow and recession discharge. found that, when hydraulic properties are vertically compartmentalized, streamflow behaviour may strongly deviate from what is predicted by theory that considers drainage shallow reservoirs with homogeneous properties. further identified hillslope co...

Mass balance studies in forested catchments in the northeastern USA show that S losses via streamwater SO4 exceed measured atmospheric S inputs. Possible sources of the excess S loss include underestimated dry deposition, mineralization of organic S in soils, desorption of soil sulphate, oxidation of recently formed sulphides and mineral weathering. Evaluating the relative contribution of these...

Digital elevation models of two “steady-state” mountain ranges, the Olympic Mountains (OM) and Oregon Coast Range (OCR), are used to examine relationships between slope distributions, the development of threshold hillslopes, and steady-state topography. Plots of drainage area versus slope for these mountain ranges exhibit substantial scatter that complicates comparison of range form to analytic...

Plants affect the spatial distribution of soil microorganisms, but the influence of the local abiotic context is poorly documented. We investigated the effect of a single plant species, the cushion plant Silene acaulis, on habitat conditions, and microbial community. We collected soil from inside (In) and outside (Out) of the cushions on calcareous and siliceous cliffs in the French Alps along ...

Two data sets commonly used for geological resource assessment include bedrock geology and stream-sediment geochemistry. Traditional methods for determining relationships between these data include both qualitative and quantitative techniques. Qualitative interpretation and integration is generally based upon visual observations of spatial coincidence between the data. Quantitative results can ...

Bedrock river erosion is driven by channel hydraulics, which are not well understood for complex morphologies. Many bedrock rivers exhibit a constriction-pool-widening (CPW) morphology associated with submerged plunging flows. These flows cause velocity profile inversions resulting in high velocities near the bed and low on water surface. The first observations documenting were from relatively ...