A new surface-processes model combining glacial and fluvial erosion
نویسندگان
چکیده
منابع مشابه
Assessing the relative efficiency of fluvial and glacial erosion through simulation of fluvial landscapes
The relative rates of erosion by rivers and glaciers, and the topographic effects of these two different styles of erosion, remain outstanding problems in geomorphology. We use a quantitative description of local fluvial landscapes to estimate how glaciated landscapes might look now had glaciers not developed. This indicates the landscape modification attributable to glacial erosion. We present...
متن کاملThe relative efficacy of fluvial and glacial erosion over modern to orogenic timescales
Since the late nineteenth century, it has been debated whether rivers or glaciers are more effective agents of erosion1. The dramatic landscapes associated with glaciated terrain have often led to the argument that glaciers are more erosive than rivers, and recent studies have documented the topographic signature of an ice-controlled limit of mountain height known as the ‘glacial buzz-saw’2,3. ...
متن کاملImpact of glacial erosion on Be concentrations in fluvial sediments of the Marsyandi catchment, central Nepal
[1] Several processes contribute to denudation in high-mountain environments. Of these, glacial erosion is particularly difficult to constrain, despite its critical importance in the evolution of many mountain ranges. In this study, we present a new data set of Be concentrations in fluvial sediments sampled along the Marsyandi River and its main tributaries in central Nepal. We interpret the Be...
متن کاملErosion of biofilm-bound fluvial sediments
The movement of fluvial sediment shapes our rivers. Understanding sediment entrainment has been a goal of hydraulic engineers for almost a century1,2. Previous sediment entrainment models have been informed by laboratory experiments using grains that were free from biological material3. In natural river settings, however, sediments are invariably covered by bacteria, often forming visible biofi...
متن کاملThe Influence of Alpine Glaciation on the Relief of Tectonically Active Mountain Belts
A surface processes model incorporating large-scale fluvial processes, local hill-slope processes, and glacial erosion is used to investigate the effect of glaciation on the relief of a fast-growing, narrow orogen. The results of several simulations show that: glaciers concentrate erosion near peaks; fluvial erosion is reduced downstream of glaciers; glaciers with frozen bases can lead to an in...
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ژورنال
عنوان ژورنال: Annals of Glaciology
سال: 1999
ISSN: 0260-3055,1727-5644
DOI: 10.3189/172756499781821797