Model:QDSSM

Contact

Name	George Postma
Type of contact	Project manager
Institute / Organization	Utrecht Univeristy
Postal address 1	Budapestlaan 4
Postal address 2
Town / City	Utrecht
Postal code	3584 CD
State	NO STATE
Country	The Netherlands"The Netherlands" is not in the list (Afghanistan, Albania, Algeria, Andorra, Angola, Antigua and Barbuda, Argentina, Armenia, Australia, Austria, ...) of allowed values for the "Country" property.
Email address	gpostma@geo.uu.nl
Phone	+31 30 2534155
Fax	+31 30 2532648

Name	Xander Meijer
Type of contact	Model developer
Institute / Organization
Postal address 1
Postal address 2
Town / City
Postal code
State
Country
Email address
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QDSSM

Metadata

Summary Also known as Model type Single Model part of larger framework Note on status model Date note status model Technical specs Supported platforms Windows Other platform Programming language Fortran90 Other program language Code optimized Single Processor Multiple processors implemented Nr of distributed processors Nr of shared processors Start year development 1998 Does model development still take place? Yes If above answer is no, provide end year model development Code development status When did you indicate the 'code development status'? Model availability As code Source code availability (Or provide future intension) Through owner"Through owner" is not in the list (Through web repository, Through CSDMS repository) of allowed values for the "Source code availability" property. Source web address Source csdms web address Program license type Other Program license type other NOT SURE Memory requirements -- Typical run time On a 0.5 GHz Windows server, a 1000 time steps and 50 x 50 cell grids takes less than 2 minutes. The run time is never an issue. Getting the input files in place to make a run is the limiting factor. Memory becomes an issue with increasing size of the cell grid. In/Output Describe input parameters Input is in the form of values per time step for the following variables: files of rain fall, river inlet, sea-level, substratum thickness, tectonics, subsidence, while the model is calibrated through environmental coefficients, threshold slopes, threshold discharge, and set for interval time steps, number of time steps, environmental coefficients (m2/yr) and substratum grain size. Input format ASCII Other input format Describe output parameters Maps of geomorphology, discharge, deposition, isopachs, stratigraphic thickness, grain size, contour, subsidence, and environment Output format Binary Other output format Pre-processing software needed? No Describe pre-processing software Post-processing software needed? No Describe post-processing software Visualization software needed? Yes If above answer is yes Other visualization software Surfer Process Describe processes represented by the model Time-averaged sediment transport by long-range river transport based on discharge and gradient and on short range diffusive transport based on gradient and diffusion coefficients. Thresholds for slope and discharge can be set and act as a means to keep the flow from spreading over every adjacent grid cell allowing avulsion and bifurcation processes to be modeled. Describe key physical parameters and equations Basin digital elevation model. Describe length scale and resolution constraints The model has been successfully used for simulation of river-shelf-slope configuration with a length of 0.005–400 km. The very short length scale refers to laboratory produced physical landscape models that have been used for calibration of avulsion and headward erosion processes. Describe time scale and resolution constraints Time steps of 10 – 1000 years depending on output range. Total range up to Millions of years. Describe any numerical limitations and issues The model does not allow for compaction Testing Describe available calibration data sets Have successfully tested the model on the Colorado river shelf system, and along analogue models. Upload calibration data sets if available: Describe available test data sets -- Upload test data sets if available: Describe ideal data for testing Time-averaged values over 1000 years from seismic and sequence stratigraphic studies. Other Do you have current or future plans for collaborating with other researchers? Is there a manual available? No Upload manual if available: Model website if any Model forum / discussion board Comments Model was initially developed to interpolate between analogue experiments and landscape evolution done at the Utrecht University by George Postma and coworkers. Introduction History Papers Issues Help Input Files Output Files Download Source