Debris Entrainment Processes at Glacier Beds

冰川床的碎屑夹带是一种基本的地貌 因为它为侵蚀过程提供了工具 例如磨损和采石。 尽管如此， 碎片夹带仍然不完全清楚。 这 调查，重点是这些机制，结合 在实验室和现场的实验研究与理论 对碎片的热力和水文控制分析 夹带 被广泛接受的“韦特曼-博尔顿”冻结假说， 碎片夹带将重新审查的有限元 水文水流模拟 底部冰透镜（二次隆起）夹带的碎片 寒冷的冰川也可能是一个非常重要的过程。 基本 这一过程的物理学将在以下背景下进行研究： 现场数据支持这种现象的存在。 涉及数值模拟的理论工作，以阐明 碎片夹带率和控制这一机制将是 介绍了

Debris entrainment at glacier beds is a fundamental geomorphic process because it provides the tools for erosional processes such as abrasion and quarrying. Nonetheless, processes of basal debris entrainment remain incompletely understood. This investigation, which focuses on these mechanisms, combines experimental studies in laboratory and field with theoretical analysis of thermal and hydrologic controls on debris entrainment. The widely accepted "Weertman-Boulton" freeze-on hypothesis of debris entrainment will be reexamined by finite-element hydrologic flow modelling. Debris entrainment by ice lensing (secondary heave) at the soles of cold glaciers may also be a very important process. The basic physics of this process will be investigated in the context of field data supporting the existence of this phenomenon. Theoretical work involving numerical simulations, to elucidate debris-entrainment rates and controls on this mechanism will be described.