Fully Coupled Model of Ice-Jam Dynamics
| Autor: | Robert Ettema, Jon E. Zufelt |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Mathematical model
Meteorology Water flow Ice stream Flow (psychology) Hydrograph Mechanics Geotechnical Engineering and Engineering Geology Industrial and Manufacturing Engineering Physics::Fluid Dynamics Momentum Routing (hydrology) Conservation of mass Physics::Atmospheric and Oceanic Physics Geology |
| Zdroj: | Journal of Cold Regions Engineering. 14:24-41 |
| ISSN: | 1943-5495 0887-381X |
| DOI: | 10.1061/(asce)0887-381x(2000)14:1(24) |
| Popis: | This paper presents a numerical model that simulates the dynamic failure and re-formation of an ice jam. The model comprises a simultaneous solution of the 1D, unsteady flow equations (conservation of mass and momentum) for water flow and ice motion. Its use is demonstrated in the routing of flow hydrographs through a channel containing an initial jam or accumulation of broken ice. The model shows the extent to which changes in flow discharge may affect profiles of jam thickness and flow depth for these situations. It also shows how ice momentum may affect the jam-thickness profile. Dimensionless parameters, characterizing initial jam stability and the shape of the hydrograph, are identified to indicate conditions when changes in flow discharge and ice momentum should be taken into account when estimating jam thickness. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|