Terrestrial Mo

Terrestial model descriptions

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Model	Contact Person	Discussion Page

AquaTellus	Irina Overeem	Not yet
Contact information
Institute:	CSDMS, INSTAAR, University of Colorado
City:	Boulder, CO
Country:	USA
Email:	irina.overeem@colorado.edu

Caesar	Tom Coulthard	Not yet
Contact information
Institute:	University of Hull
City:	Hull
Country:	UK
Email:	T.Coulthard@hull.ac.uk

HEBEM	Jeffrey Niemann	Not yet
Contact information
Institute:	Colorado State University
City:	Fort Collins, CO
Country:	USA
Email:	jniemann@engr.colostate.edu
Model description
Model type:	Single model
Description:	The Hydrologically Enhanced Basin Evolution Model (HEBEM) is a combined hydrologic/geomorphic model. The hydrologic model simulates precipitation with variability, infiltration, evapotranspiration, overland flow, and groundwater flow, thus producing a spatially and temporally varying water discharge Q that drives fluvial processes in the land surface. The geomorphic model accounts for tectonic forcing, hillslope processes, erosion, and sediment transport. The combined model uses multiple time steps for hydrologic and geomorphic processes. Due to its hydrologic represenation, the model is able to investigate the interaction between hydrology and geomorpholgy.
Technical information
Supported platforms:	Unix
Programming language:	Fortran77, Fortran90, C
Model was developed started from:	2001 and development still takes place
To what degree will the model become available:	Not
Current license type:	--
Memory requirements:	--
Typical run time:	--
Input / Output description
Input parameters:	A grid with initial elevation Hydrologic time step and geomorphic time step Hydrologic parameters: average rainfall intensity, rainfall duration, interstorm period, infiltration capacity, porosity, hydraulic conductivity, aquifer depth, specific yield, PET Geomorphic parameters: baselevel lowering rate, diffusivity for hillslope processes, weathering rate, parameters for erosion and sediment transport model
Input format:	ASCII
Output parameters:	Elevations of all nodes, elevation changes of all nodes
Output format:	ASCII
Post-processing software (if needed):	No
Visualization software (if needed):	No
Process description
Processes represented by model:	Hydrologic processes: Precipitation, infiltration, evapotranspiration, overland flow, saturation-excess runoff, groundwater flow Geomorphic processes: Baselevel lowering, weathering, hillslope processes, erosion, sediment transport
Key physical parameters & equations:	Infiltration capacity, water balance equation Hydraulic conductivity, 2-D Dupuit groundwater movement equation
Length scale & resolution constraints:	A grid with 100x100 cells. Typical cells with a resolution of 40x40m
Numerical limitations and issues :	Time scale of 10,000 years. Typical time step is 3 hour
Testing
Available calibration data sets:	The hydrologic model was calibrated using hydrologic measurements of WE-38 watershed in PA
Available test data sets:	N/A
Ideal data for testing:	N/A
User groups
Currently or plans for collaborating with:	None
Documentation
Key papers of the model:	Huang, X., and J. D. Niemann, How do streamflow generation mechanisms affect watershed hypsometry? Earth Surface Processes and Landforms, 2007, doi:10.1002/esp.1573 (currently published online). Huang, X., and J. D. Niemann, An evaluation of the geomorphically effective event for fluvial processes over long periods, Journal of Geophysical Research, 111, F03015, 2006, doi:10.1029/2006JF000477. Huang, X., and J. D. Niemann, Modeling the potential impacts of groundwater hydrology on long-term drainage basin evolution, Earth Surface Processes and Landforms, 31(14), 1802-1823, 2006, doi:10.1002/esp.1369.
Is there a manual available:	No
Model website if any:	No
Additional comments
Comments:	No