Community Hydrologic Modeling Platform

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Community Hydrologic Modeling Platform, Larry Murdoch . Objectives. 1. Represent physics associated with all terrestrial waterInclude physics associated with the terrestrial water cycle, including flow and storage of ground water, vadose, streams, lakes, estuaries, glaciers, snow, etc.2. Accommodate parameters and physics over a wide range of scalesInclude techniques for adjusting equations to accommodate scales from pores to continents; methods to up-scale and down-scale parameters. 3. 9444

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Community Hydrologic Modeling Platform

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1. Community Hydrologic Modeling Platform, Larry Murdoch Community Hydrologic Modeling Platform

2. Community Hydrologic Modeling Platform, Larry Murdoch

3. Community Hydrologic Modeling Platform, Larry Murdoch More Objectives

4. Community Hydrologic Modeling Platform, Larry Murdoch Architecture

5. Community Hydrologic Modeling Platform, Larry Murdoch Packages on the Platform Forward package with general capabilities to represent multi-domain (all domains) of distributed hydrologic processes Inverse package with parameter estimation and optimization schemes Stochastic package with general geostatistical capabilities Visualization package with general graphical and data display capabilities Data package Store existing observational and computed data.

6. Community Hydrologic Modeling Platform, Larry Murdoch Communication and Growth

7. Community Hydrologic Modeling Platform, Larry Murdoch Key to Growth: Peer-reviewed publication of functionality and data

8. Community Hydrologic Modeling Platform, Larry Murdoch Forward model, options 1. Couple existing models Selected analytical, numerical models Couple together with OpenMI, CCA… 2. Revise existing models Ed, Chris, Reed… 3. New Approach Hydrologic Multiphysics Commercial (Comsol, ANSYS, CFD-ACE, ABACUS/ Simulia…) Open source (Salome, OpenFOAM, Elmer…)

9. Community Hydrologic Modeling Platform, Larry Murdoch Hydrologic Multiphysics

10. Community Hydrologic Modeling Platform, Larry Murdoch Performance Comparison Research code development Write new code Modify existing source code Include new module

11. Community Hydrologic Modeling Platform, Larry Murdoch Write new code Example: Flow through deformable fracture DFrx code [Murdoch and Germanovich, 2006] Laminar/turbulent flow through fracture in elastic material. Propagation possible Continuity+momentum+elasticity Finite difference + semi-analytical + coupling 100 pages of Fortran source Time required: 2 years Multiphysics implementation Same physics and coupling as above Time required: 1 week

12. Community Hydrologic Modeling Platform, Larry Murdoch Modify existing source code Example: Flow of power-law fluid through porous media to evaluate experiments T2VOC Rewrite viscosity function Modification of Fortran source Time required: 4 months Multiphysics implementation Include Time required: 30 minutes + 1 day to check

13. Community Hydrologic Modeling Platform, Larry Murdoch Include existing module Fresh water lens over saltwater MODFLOW+SEAWAT Include libraries, set-up solver in GUI Read about module Get it to run Time required: 7 hours Multiphysics implementation Include Time required: 1 minute + 10 minutes to check

14. Community Hydrologic Modeling Platform, Larry Murdoch Comparison

15. Community Hydrologic Modeling Platform, Larry Murdoch Multiphysics Multiscale

16. Community Hydrologic Modeling Platform, Larry Murdoch Dissolution of a stream bed

17. Community Hydrologic Modeling Platform, Larry Murdoch Dissolution of a stream bed

18. Community Hydrologic Modeling Platform, Larry Murdoch Advantages Huge flexibility in designing analyses, wide range of problems in hydrology and related Capabilities beyond most hydro models Fast to set-up Easy to communicate new methods Access to equations; good for modification, good for teaching Built on Matlab, so powerful opportunities for coupling with optimization, stochastic, image processing, visualization, other.

19. Community Hydrologic Modeling Platform, Larry Murdoch Current limitations Geometries designed for engineering, more work needed for hydrologic geometries, irregular geometries in 3-D Some applications are slow, need work on formulation and verification Parallel processor capability available, but currently optimized only for a few processors License

20. Community Hydrologic Modeling Platform, Larry Murdoch

21. Community Hydrologic Modeling Platform, Larry Murdoch General Approach

22. Community Hydrologic Modeling Platform, Larry Murdoch Conclusion Objectives Architecture Publication HM Evaluation Project

23. Community Hydrologic Modeling Platform, Larry Murdoch Objectives 1. Represent physics associated with all terrestrial water 2. Accommodate parameters and physics over a wide range of scales 3. Flexibility to represent many physical, chemical and biological processes 4. Ability to advance and modify capabilities using input from the community 5. Easy to use and readily available to community 6. Visualization 7. Facilitate education 8. Execute simulations on single, or many parallel processors 9. Couple with Ocean and Atmospheric Circulation Models 10. Exchange data with Hydrologic Information System 11. Ability to estimate model parameters and characterize uncertainty from large data sets 12. Stochastic processes

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