SIMULATION COMPONENT AND MODFLOW DATA MODEL

Simulation Component

Boundary Polygon J I Defines the model location and orientation

φ φ i i j j Boundary Origin X X Y Y The model location in space is defined by:  Origin – the X, Y position of the model boundary  Rotation angle – measured from the north Model Location

Cell2D and Node2D Features Cell2D Node2D  Define the model cells and nodes  For a 3D model define the cells and nodes of a single layer

 Define the model cells and nodes as 3D features (points and multipatches)  Mostly used for visualization of 3D models Cell3D and Node3D Features

CELL3D ANIMATION Demo

 A complete description of a simulation model inside a database  Enable the storage of model inputs and outputs Interface Data Models

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

 Links Cell2D and Node2D with Cell3D and Node3D  Includes I, J, K, IJ, and IJK indexes CellIndex Table

 IJ index – Cell2D and Node2D  IJK index – Cell3D and Node3D CellIndex Table

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

 Import a complete model (including creation of MODFLOW features)  Import only model tables (no features created)  Import MODFLOW outputs – populates output tables Import Tools Options:

 A MODFLOW world file (.mwf) must be built prior to importing your model  World files can be exported by other programs (e.g. GMS)  Can be created using the Create MODFLOW World File tool  The world file contains:  Origin coordinates  Rotation angle  Reference to a projection file MODFLOW World File

 Tool for importing a MODFLOW model based on a world file  The tool does the following:  Import the MODFLOW tables  Create the CellIndex table  Create Cell2D and Node2D features Import Georeferenced MODFLOW Model

INPUTOUTPUT

 Imports the MODFLOW files into the MODFLOW-related tables in the geodatabase without creating features (Node2D, Cell2D)  Typically used to update a previously imported model Import MODFLOW Tables

 Imports the outputs of a simulation (head, drawdown, ccf)  Output files need to be in binary format  The tool populates the OutputHead, OutputFlow, and OutputDrawdown tables Import MODFLOW Outputs

 Create a model boundary – a number of different options  Create 2D and 3D cells/nodes Tools for Creating Features

Export tools Export from tables to MODFLOW text files

 A view is created by joining spatial features (cells/nodes) with model inputs/outputs stored in the MODFLOW tables  The joins are based on the IJ and IJK indexes Tools for Creating Views

 Creates a new feature class with features representing the active zones in the MODFLOW model  Inputs include the Cell2D features and IBOUND table  An active zone polygon is generated for each layer in the MODFLOW model IBOUND To Polygon Active zone

 Creates a layer based on a join between features and tables  The result is an in-memory (temporary) layer stored in the map  The layer is updated automatically if the data in the table is updated Make MODFLOW Feature Layer

INPUTOUTPUT Or + Cell2D Node2D

 Similar to the Make MODFLOW Feature Layer tool  The result is a new feature class on disk  The features will not be updated automatically if the data in the table is updated Create MODFLOW Features

Map Layer – Computed Head

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

Discretization of Features

Geoprocessing Tools

 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 Geoprocessing Tools - Workflows

 Start with an existing calibrated MODFLOW Model  Create a new geodatabase and feature dataset with the appropriate spatial reference  Find the origin X and Y coordinates and the grid orientation  Run the Import Georeferenced MODFLOW Model tool  Load background map Example Workflow Step 1 - Import an existing MODFLOW Model:

Example Workflow Step 2 - Create active boundaries Layer 1Layer 4Layer 6

Example workflow Step 3 - Create maps of packages using the Make MODFLOW Feature Layer tool HY VCont Recharge

Example workflow Step 4 - Import simulated heads and create map layers to visualize

Map MODFLOW Outputs Step 5 - Create 3D features and visualize in ArcScene