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From CSDMS
No but possible +
No but possible +
No but possible +
Single Processor +
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22:51:07, 19 December 2011 +
No calibration data sets. We validate the model against available analytical solutions and use it to analyze the system behavior under a general base-level fall and base-level rise. See Lorenzo-Trueba et al. 2012. +
Physical experiments and/or field observations of the sedimentary record. +
The key physical parameters are: (1) the s … 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. </br></br>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. Paola 2000 and Lorenzo-Trueba et al.2009. +
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. +
Currently it is not possible to model transgression followed by regression. +
Shoreline and alluvial-bedrock transition trajectories over time.
Future versions of the model will include the profile evolution. +
We model sedimentation in a fluvio-deltaic … We model sedimentation in a fluvio-deltaic system under base-level changes. Possible dynamics include: (1) river aggradation (i.e., a seawards migration of the alluvial-basement transition), (2) river degradation (i.e., a landwards migration of the alluvial-basement transition), (3) regression (i.e., a seawards migration of the shoreline), and (4) transgression (e.g., a landwards migration of the shoreline)., a landwards migration of the shoreline). +
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. +
We present a geometric model able to track … We present a geometric model able to track the geomorphic boundaries that delimit the fluvial plain of fluvial-deltas: the shoreline and the alluvial-bedrock transition. By assuming a fluvial profile with a quadratic form, which satisfies the overall mass balance and the boundary conditions dictated by diffusive transport, we are able to provide a solution that accounts for general base-level changes.t accounts for general base-level changes. +
Jorge +
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ASCII +
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0 +
Coastal +
Tool +
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02:18:19, 17 September 2020 +
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Geometric model to study the response of fluvial-deltas to base-level changes. +
ASCII +
2 Third Ave SE +
55414 +
false +
false +
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GPL v2 +
Matlab +
typically less than 10 seconds +
2010 +
Model developer +
