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Arc Hydro groundwater data model

Arc Hydro groundwater data model. ESRI User Conference July 2005. Gil Strassberg, David R. Maidment, and Norman L. Jones. Arc Hydro surface water. A data model for representing surface water systems. Published by ESRI press, 2002. Goals of the data model. Objective.

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Arc Hydro groundwater data model

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  1. Arc Hydro groundwater data model ESRI User Conference July 2005 Gil Strassberg, David R. Maidment, and Norman L. Jones

  2. Arc Hydro surface water A data model for representing surface water systems Published by ESRI press, 2002

  3. Goals of the data model Objective Develop a data model for representation of groundwater systems. Data model goals • Support representation of regional and site scale groundwater systems. • Enable the integration of surface water and groundwater data. • Connection to groundwater modeling software.

  4. Regional groundwater systems • Usually the horizontal scale >> vertical scale • In many cases modeled as 2 dimensional flow system

  5. Site scale groundwater studies Characterization of Savannah River Site in South Carolina • Usually model 3D flow to study mass transport • Important to establish a 3D model of the system

  6. Integration of surface water and groundwater information Need to represent movement of water between the surface and subsurface Geographic relationship between the surface and groundwater elements Conjunctive view and analysis of information from groundwater and surface water systems

  7. Connection to groundwater models Data model = Database Model input Model outputs

  8. Data model framework Features describing the hydrogeology of the system Table that describes hydrogeologic units and their properties Features used in relation with modeling Raster catalog to represent geologic formations and parameter distribution Raster catalog to represent water related parameters Describes surfaces

  9. Hydrogeology feature dataset Wells (points) Aquifer (2D Polygon) GeoArea (2D Polygon) GeoLine (2D line) GeoVolume (Multipatch) GeoSection (3D polygon) BoreLine (3D line)

  10. Hydrogeologic unit Describes the hydrogeologic unit and links together the spatial representations Hydrogeologic unit table

  11. GeoRasters Raster catalog • GeoRasters: • Distribution of properties • Define boundaries of hydrogeologic units Transmisivity Hydraulic conductivity Top of formation Formation base GeoRasters are usually constant over time Woodbine aquifer, Texas

  12. Rasters Series describe water related properties over time Potentiometric surface Saturated thickness Contaminant concentration

  13. Modeling feature dataset Connection to modeling tools: enable the preparation of model inputs and communication of model outputs 2 dimensional models 3 dimensional models

  14. Tools Develop tools that help create and populate the data model classes • Many of the objects are three dimensional and require custom tools to populate the classes • Tools to connect with models

  15. Example 1:Representing hydrogeology of an aquifer system North Carolina coastal aquifer system

  16. North Carolina coastal aquifer system Section line * From USGS, Water Resources Data Report of North Carolina for WY 2002

  17. Example 2:Representation of 3D site scale measurements Case study of the MADE (Macrodispersion Experiment) site

  18. MADE site • Text files: • tracer concentrations • Hydraulic conductivity measurements • Hydraulic head measurements From Harvey and Gorelick. WATER RESOURCES RESEARCH, VOL. 36, NO. 3, PAGES 637–650, MARCH 2000

  19. 3D sampling ports A well can be related to multiple sampling ports

  20. Querying and displaying 3D measurements Creates a new temporary layer with measurements for a specific variable, in a certain value range, at a selected time

  21. Interpolation using new 3D tools Tetrahedral network of Bromide concentrations 3D interpolation tools Isosurfaces of Bromide concentrations

  22. Example 3:Interfacing with MODFLOW Barton Spring segment of the Edwards aquifer GAM model

  23. GAM models for the Edwards Aquifer • MODFLOW models are developed as part of the GAM models for Texas • Models can be downloaded from the TWDB website

  24. Model Boundary Using external models we can create solid models that can then be stored and visualized within GIS

  25. Barton Creek Williamson Creek Interstream recharge Slaughter Creek Bear Creek Onion Creek No recharge Model dimensions • The model is 1 layer with 120 by 120 cells • Each cell is 1000 by 500 • Steady state (20 years) and transient (10 years) models • Model Packages: Recharge, Well, Drain

  26. Tools to populate the relevant classes in the data model from MODFLOW files

  27. Aggregate and query the model results from GIS Define zones of interest through GIS Get Budgets for the defined zones

  28. Future work • Finalize the conceptual data model design • Create a detailed database design • Get feedback from the groundwater community Refine the model and test on more case studies

  29. For more information and updates Websites: ESRI Data models website: www.support.esri.com/datamodels Gil Strassberg website: https://webspace.utexas.edu/gstras/MyWebsite/ GIS Water Resources Consortium, CRWR UT Austin: http://www.crwr.utexas.edu/giswr/ Contacts: Gil Strassberg – gilstras@mail.utexas.edu David R. Maidment – Maidment@mail.utexas.edu Norman L. Jones njones@byu.edu

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