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MODFLOW Data Model

MODFLOW Data Model. An extension of the Arc Hydro Groundwater Simulation feature dataset. Simulation Feature Data Set. Boundary Polygon. J. I. Cell2D and Node2D Features. Cell2D. Node2D. CELL3D Features. Ancestral Streams. Ancestral Streams. Ancestral Streams. Riverbank.

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MODFLOW Data Model

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  1. MODFLOW Data Model An extension of the Arc Hydro Groundwater Simulation feature dataset

  2. Simulation Feature Data Set

  3. Boundary Polygon J I

  4. Cell2D and Node2D Features Cell2D Node2D

  5. CELL3D Features

  6. Ancestral Streams

  7. Ancestral Streams

  8. Ancestral Streams

  9. Riverbank Model Layer 1 • Consists of sands, silts, and clays from floodplain and alluvial deposits • Superjacent ancestral stream channels cut across this formation creating lateral channels of gravels and unconsolidated sediments

  10. Turlock Lake Laguna Formation Model Layers 3,4 and 5 • Predominantly consists of sands, silts, and clays • Superjacent ancestral stream channels cut across this formation, creating lateral channels of gravels and unconsolidated sediments

  11. Mehrten Formation Model Layers 6,7 and 8 • Composed of two dominant units: • Black andesitic sands “salt and pepper sand” and blue and brown clays • Hard gray and black tuff-breccias “lava”

  12. Valley Springs Formation Model Layer 9 • Consists of rhyolite ash, quartz sand , and ashy clay

  13. Ione Formation Model Layer 10 • Consists of sandstone, silts, and clays

  14. Interface Data Models

  15. MODFLOW Data Model • Data standard for storing MODFLOW models in a GIS database • Importing models built externally • Building new MODFLOW models inside ArcGIS • Custom scripts for analyzing/modifying models can be developed as geoprocessing tools

  16. MODFLOW Data Model

  17. MODFLOW Analyst Tools • Developed as geoprocessing (GP) tools • Classes of tools • Import • Export • Visualization/Map Layers • Model editing • Building package input • Working with transient input/solutions

  18. Import MODFLOW Model Tool INPUT OUTPUT

  19. Make MODFLOW Features Tool + Or Node2D Cell2D INPUT OUTPUT

  20. Map Layer – Computed Head

  21. Build Package Input • Discretize: • Spatial • Polygons  K zones (overlay) • Points  K values (interpolate) • Polylines  River cells • Points  Wells • Temporal • Time Series  Stress Periods

  22. Discretization of Features

  23. MODFLOW Array from Polygons

  24. Geoprocessing Tools

  25. Geoprocessing Tools

  26. Geoprocessing Tools - Workflows • GP tools enable the development of workflows as models or scripts • Extendable – You can create your own workflows • Leverage low-level tools to create new tools

  27. Model Domain Bear River Sierra Nevada Feather River Sacramento River Mokelumne River

  28. Land Use Patterns Master Land Use File Farm Data Change from Non-urban to Urban

  29. Water Unit Demand Factors Agricultural Demand Factors (DWR) • Model Output for Representative Water Years Urban Demand Factors • Normalization Factor based on Water Year Index Monthly Conversion Factors Water Year Index • 2002 ITRC Crop Evapotranspiration • Rates for Eto Zone 14 • ITRC Report 02-001, funded by • CALFED and Agricultural Research • Initiative of California State Univ.

  30. Calibration of Urban Demand Factors

  31. GSSHA Results 1 2 3 4 5 6 7

  32. Automated Workflow GSSHA simulations Recharge coeff. for each STLU for each water year Master Land Use Files Water Unit Demand Factors Water Year Total Recharge GSSHA Simulation Recharge Coeffs Calculate Change in Land Use Calculate Recharge Model Total Applied Water and Precip Calculate Water Demand Calculate Total Applied Water Recharge to MODFLOW Total Flow from Ungaged Watersheds Water Budgeting and Accounting Calculate Demand Summary Lateral Inflow to MODFLOW Distribute Demand

  33. For more information http://www.archydrogw.com (AHGW Wiki page) http://www.aquaveo.com/archydro (Info on tools) Norm Jones njones@aquaveo.com

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