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

5. CELL3D Features

6. Ancestral Streams

7. Ancestral Streams

8. Ancestral Streams

9. Riverbank
Model Layer 1
Middle to Late Pleistocene deposits (formerly the Victor Formation)
Hardpan deposits are prevalent in this formation that inhibit vertical infiltration of recharge from applied water and precipitation
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
Early Pleistocene to late Pliocene deposits (formerly the Fair Oaks Formation)
Characteristic feature: white to grey tuff and tuffaceous silts “white clay”
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 Composed of two dominant units:
Model Layers 6,7 and 8
Pliocene deposits formed during an erosional sequence following chain of volcanic eruptions
Significant water bearing unit
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
Middle Miocene deposits formed during sequence of volcanic eruptions
Characteristic features: olive green – greenish gray tone of clays, silts
Consists of rhyolite ash, quartz sand , and ashy clay

13. Ione Formation Consists of sandstone, silts, and clays Model Layer 10
Consists primarily of sandstone and clays deposited during the Eocene epoch, a time when the ancient sea became fresh to brackish.
Generally low in permeability, although secondary fracturing near the outcrops
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

20. 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

21. Import MODFLOW Model Tool
INPUT
OUTPUT

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

23. Map Layer – Computed Head

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

25. Discretization of Features

26. MODFLOW Array from Polygons

27. Geoprocessing Tools

28. Geoprocessing Tools

29. 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

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

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

32. 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 , funded by
CALFED and Agricultural Research
Initiative of California State Univ.

33. Calibration of Urban Demand Factors

34. GSSHA Results 1 2 3 4 5 6 7

35. Automated Workflow Total Recharge 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

36. For more information
(AHGW Wiki page)
(Info on tools)
Norm Jones