منابع مشابه
Subglacial swamps
The existence of both water and sediment at the bed of ice streams is well documented, but there is a lack of fundamental understanding about the mechanisms of ice, water and sediment interaction. We pose a model to describe subglacial water flow below ice sheets, in the presence of a deformable sediment layer. Water flows in a rough-bedded film; the ice is supported by larger clasts, but there...
متن کاملDynamics of subglacial floods
The Nye model of jökulhlaups is able to explain both their periodicity and even the detailed shape of the flood hydrograph. In this paper, we show how the model can be used to predict the shape of the hydrographs from the subglacial lake Grı́msvötn beneath Vatnajökull in Iceland, and we comment on three particular issues that have proved contentious in the application of the Nye model: the role ...
متن کاملSubglacial till formation: Microscale processes within the subglacial shear zone
This was a study of subglacial deformation till genesis from a modern temperate glacier, at Sk alafellsj€ okull, Iceland. Detailed microscale properties of till samples (from Scanning Electron Microscope [SEM] and thin section analysis) were examined from a glacial site with in situ subglacial process monitoring and an exposed subglacial surface in the foreland. Two lithofacies were examined, a...
متن کاملComputational Hydraulics
The aim is to give an understanding of the numerical approximation and solution of physical systems, especially in open channel hydraulics, but with more general application in hydraulics and fluid mechanics generally. The marriage of hydraulics and computations has not always been happy, and often unnecessarily complicated methods have been developed and used, when a little more computational ...
متن کاملLeaf hydraulics.
Leaves are extraordinarily variable in form, longevity, venation architecture, and capacity for photosynthetic gas exchange. Much of this diversity is linked with water transport capacity. The pathways through the leaf constitute a substantial (>or=30%) part of the resistance to water flow through plants, and thus influence rates of transpiration and photosynthesis. Leaf hydraulic conductance (...
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ژورنال
عنوان ژورنال: Journal of Glaciology
سال: 1986
ISSN: 0022-1430,1727-5652
DOI: 10.3189/s0022143000012156