Model:WTM

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WTM

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Summary Contact Technical specs In/Output Process Testing Other Component info Also known as Model type Single Model part of larger framework Note on status model Date note status model Incorporated models or components: Spatial dimensions 2D Spatial extent Global, Continental, Regional-Scale Model domain Terrestrial One-line model description Coupled groundwater and dynamic lake modelling Extended model description The Water Table Model (WTM) simulates terrestrial water changes over the full range of relevant spatial (watershed to global) and temporal (monthly to millennial) scales. It comprises coupled components to compute dynamic lake and groundwater levels. The groundwater component solves the 2D horizontal groundwater-flow equation by using non-linear equation solvers in the C++ PETSc library. The dynamic lakes component makes use of the Fill-Spill-Merge (FSM) algorithm to move surface water into lakes, where it may evaporate or affect groundwater flow. Keywords: Lake levels, groundwater, Name Kerry Callaghan Type of contact Model developer Institute / Organization University of Illinois Postal address 1 Postal address 2 Town / City Chicago Postal code 60607 State Illinois Country United States Email address kerryc@uic.edu Phone Fax Name Andrew Wickert Type of contact Technical contact Institute / Organization University of Minnesota Postal address 1 Postal address 2 Town / City Postal code State Minnesota Country United States Email address awickert@umn.edu Phone Fax Name Richard Barnes Type of contact Technical contact Institute / Organization Lawrence Berkeley National Lab Postal address 1 Postal address 2 Town / City Berkeley Postal code State California Country United States Email address Phone Fax Supported platforms Unix, Linux, Mac OS Other platform Programming language C++ Other program language Code optimized Multiple Processors Multiple processors implemented Distributed memory Nr of distributed processors Nr of shared processors Start year development 2021 Does model development still take place? Yes If above answer is no, provide end year model development Code development status Active When did you indicate the 'code development status'? 2024 Model availability As code Source code availability (Or provide future intension) Through web repository Source web address https://github.com/KCallaghan/WTM/ Source csdms web address Program license type GPL v3 Program license type other Memory requirements -- Typical run time -- Describe input parameters deltat {Number of seconds per time step, e.g. 315360000 for a 10-year time step} southern_edge {Southern-most latitude of your domain in decimal degrees, e.g. 5} maxiter 500 {How many times GW should run before FSM runs} total_cycles 1000 {how many times FSM should run before completion} infiltration_on 0 {true is 1, false is 0. Only recommend true for high-resolution input data.} fdepth_a 200 {e-folding depth coefficients} fdepth_b 150 {e-folding depth coefficients} fdepth_fmin 2 {e-folding depth coefficients} Input format Binary Other input format Describe output parameters The program outputs a text file that provides information on the current minimum and maximum water table elevation, the changes in surface water and groundwater within the past iteration, and the number of iterations passed. The main output is a geoTiff file that supplies the depth to/elevation of the water table. Negative values indicate a water table below the surface, while positive values indicate a water table above the surface (i.e. a lake). 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? No If above answer is yes Other visualization software Describe processes represented by the model -- Describe key physical parameters and equations -- Describe length scale and resolution constraints -- Describe time scale and resolution constraints -- Describe any numerical limitations and issues -- Describe available calibration data sets Upload calibration data sets if available: Describe available test data sets Upload test data sets if available: Describe ideal data for testing 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 This part will be filled out by CSDMS staff OpenMI compliant No but possible BMI compliant No but possible WMT component No but possible PyMT component No but possible Is this a data component No Can be coupled with:

Model info Authors Kerry Callaghan Wickert, Barnes Source code Go to external source code site Model citations Nr. of publications: 8 Total citations: 96 h-index: 3 m-quotient: 0.09 QR-code Link to this page Other models by author WTM

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Nr. of publications:	8
Total citations:	96
h-index:	3
m-quotient:	0.09

Featured reference(s)	Open Access Status	Year	Type of Reference	Cited
Callaghan, K.L.; Wickert, A.D.; Barnes, R., and Austermann, J.; 2025. The Water Table Model (WTM) (v2.0.1): coupled groundwater and dynamic lake modelling. Geoscientific Model Development, 181463–1486. 10.5194/gmd-18-1463-2025	cc-by · publishedVersion	2025	a module overview describing a module	3

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