Automated well permitting. Application of Arc Hydro Groundwater and MODFLOW Analyst. Calibrated regional model is imported to ArcGIS as a “baseline” model Candidate wells are added to baseline model using well package. Impact of new well is analyzed using MODFLOW. Overview.
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
Application of Arc Hydro Groundwater and MODFLOW Analyst
Calibrated regional model is imported to ArcGIS as a “baseline” model
Candidate wells are added to baseline model using well package.
Impact of new well is analyzed using MODFLOW
Step 1: User applies for a new well (coordinates, pumping rate, screen elevations).
Create a new feature in the Well feature class
New Well (HydroID = 1001)
Step 2: Create new instances in the WEL table.
Custom tool that creates MODFLOW instances based on the location of the well and the screen elevations and finds the appropriate MODFLOW cell.
CellID represents MODFLOW i, j, k values
SourceID is the HydroID of the well feature
Step 3: Export the new well data to the MODFLOW text file
Step 4: Run MODFLOW simulation with candidate well
Use OBS process to compute new flows at rivers, drains, etc.
Export drawdown file as part of solution.
Step 5: Read solution and compare to “base” simulation
Permitting criteria based on impact to streams, springs, etc.
Create new well update well table export well package file run MODFLOW import solution build map layers
Location of candidate well
Virginia Coastal Plain Model (VCPM)
10-layer MODFLOW model used to analyze impacts of candidate wells
Criteria based on state law
Potentiometric surface cannot fall below a critical surface (80% drawdown)
Area of Impact defined by drawdown = 1 ft
Heads for layer 8
Create new well update well table export well package file run MODFLOW import solution build drawdown map layer
Area of Impact Cells
Area of Impact Contour