seddik_2005.htm
Bulletin of Glaciological Research 22 (2005)
75-79
©Japanese Society of Snow and Ice
Numerical simulation of glacial-valley cross-section
evolution
Hakime SEDDIK1, Shin SUGIYAMA2 and Renji NARUSE1
1 Research Institute for Humanity and Nature,
335 Takashimacho Kamigyo-ku Kyoto-city Kyoto
602-0878 Japan
2 Graduate School of Environmental Studies,
Nagoya University, Nagoya 464-8601, Japan
Abstract
A numerical model for glacial-valley cross-section evolution has been developed. The model allows the simulation of the development of U-shaped valleys by coupling an ice flow model in a transverse section with an erosion model. The core of the cross-section development model is the calculation of the two-dimensional flow speed field in a transverse cross-section considering the lateral drag from glacier side walls and the basal-stress dependent sliding speed. Assuming that the glacial erosion is a quadratic function of the sliding speed, the model shows rapid evolution of a V-shaped profile into a recognizable glacial form with sliding velocities ranging from 3m a-1 to 8m a-1.
