Model:Quad: Difference between revisions
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Future versions of the model will include the profile evolution. | Future versions of the model will include the profile evolution. | ||
|Output format=ASCII | |Output format=ASCII | ||
|Pre-processing software needed?=No | |Pre-processing software needed?=No | ||
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|Describe key physical parameters and equations=The key physical parameters are: (1) the sediment unit-flux, defined as the sediment input from the river network in units of volume per unit width. (2) The average water discharge per unit width. (3) The basement slope on top of which the delta develops. (4) The base-level curve. | |Describe key physical parameters and equations=The key physical parameters are: (1) the sediment unit-flux, defined as the sediment input from the river network in units of volume per unit width. (2) The average water discharge per unit width. (3) The basement slope on top of which the delta develops. (4) The base-level curve. | ||
The key equations are a sediment mass balance and the boundary conditions dictated by diffusive transport (i.e., the sediment flux is proportional to the local bed slope through the fluvial diffusivity). To first order calculations, we assume the fluvial diffusivity to be | The key equations are a sediment mass balance and the boundary conditions dictated by diffusive transport (i.e., the sediment flux is proportional to the local bed slope through the fluvial diffusivity). To first order calculations, we assume the fluvial diffusivity to be half the water discharge per unit width (they both have the same units). More accurate expressions for the fluvial diffusivity can be found in Paola 2000 and Lorenzo-Trueba et al.2009. | ||
|Describe length scale and resolution constraints=In the field, this model is applicable in the range of landscape and regional scales (~10-100km). It has also been successfully applied at the scale of physical experiments. | |Describe length scale and resolution constraints=In the field, this model is applicable in the range of landscape and regional scales (~10-100km). It has also been successfully applied at the scale of physical experiments. | ||
|Describe time scale and resolution constraints=We use the ‘basin equilibrium timescale’ (Paola 2000), defined as the length scale square divided by the fluvial diffusivity. In field settings, this time scale can range from centennial to millennia up to millions of years. | |Describe time scale and resolution constraints=We use the ‘basin equilibrium timescale’ (Paola 2000), defined as the length scale square divided by the fluvial diffusivity. In field settings, this time scale can range from centennial to millennia up to millions of years. |
Revision as of 11:52, 21 December 2011
Quad
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